Pre k number recognition

44 Number Recognition Activities For Preschoolers

September 29, 2022 //  by Eileen Zajac

It's important to give your preschoolers enough experience with different math concepts throughout their time in your classroom. The best ways to do this for Preschool is by planning number recognition activities. These activities help students grow and develop properly in the following concepts:

• Gain confidence with numbers at an early age
• Build critical thinking skills
• Help your kiddos start with a strong numerical foundation

Here is a list of 45 number recognition activities that will help reach all of the abovementioned benchmarks throughout the Preschool year.

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Motor skills and math can be one and the same. This fun math activity is great for building those skills up while also helping students with their number recognition. This activity is also super simple to create with a big piece of paper (or poster board) and really any kind of markers. @Storiesaboutplay used mini glass gems, but small stones or pieces of paper can also work.

Learn more: Stories About Play

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Activity tables hold some of the best games for preschoolers. They're wonderful because students can work together as well as independently to hone in on their newfound skills and experiences. Preschool kids everywhere will love forming these big numbers with playdough and then matching up the smaller, magnetic numbers above or next, too.

Learn more: The Bored Preschooler

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Looking for ways to track your students understanding? There's nothing better than some clothespin and laminated number wheels. This has definitely become a favorite number activity that's used as an informal assessment to monitor student progress and understanding.

Learn more: Little Wonderer's Creations

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Integrating both color recognition and number recognition is really killing two birds with one stone. Not only that, but identification activities like this are also helping with students planning and deliverables skills.

Learn more: The Toddler Creative

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This is such a cute idea. If you have the resources to make this (pretty simple), then you should definitely have this activity somewhere in the classroom. These hands-on activities can be used at any time during the day to give students daily practice in math.

Learn more: The Lyndsey Lou

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Foam pieces have been used as recognition games for years. They are a great way to get students used to matching numbers with outlines. This fun game can be played with multiple students and will foster both number recognition and motor skills.

Learn more: Teaching Blocks

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Finding games that promote effective sorting skills is essential in the preschool classroom. This specific activity fosters counting skills and encourages students to practice their sorting skills. Sorting skills give students the space to observe and realize differences and similarities between objects, numbers, and more.

Learn more: Jill K in Pre-K

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Fun activities often involve big, fierce animals. This is a great center activity. Students will love to practice numeral identification through shark teeth. It'll be engaging and fun for children at all levels. Let them work independently or as a group.

Learn more: The Parenting Game

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This is a favourite number activity for preschoolers. Fun-filled hands-on activities like this will have students totally engaged and distracted from the fact that this is actually an enrichment activity. Give students a manipulative of numbers they should be fishing for.

Learn more: Bear's Den Montessori

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Treasure hunts are ALWAYS a win. This is better done in small groups, but it can be done in large groups as well. If you're able to go outside, try doing this on the playground or in the gymnasium. Have students work in teams to collect all of the numbers and fill out the treasure map.

Learn more: Play Date with DQ

Setting up a play space focused on number identification is the perfect way to tie in some extra practice for students. A math play activity for preschool kids is pretty simple to set up. Just find different objects that will promote the following:

• Number recognition
• Number usage
• Handwriting practice

Learn more: We Skoolhouse

Honestly, this is a great daily activity for students. At circle time or just at a time that you need a little structured play, you'll love watching students work on finding all of the numbers. This can be used as an informal assessment as well to monitor which students are reaching benchmarks.

Learn more: Nexus Prep Preschool

As you can see, this is one of those fun number activities that will have kiddos feeling proud of themselves. Fun number recognition activities like this are great because they can really be set up in any area of the classroom and used at any time throughout the day.

Learn more: Emy's - Nursery and Preschool

A number activity with children using construction paper! This is a great craft for any classroom learning their numbers. It is fun to create and will make for a great decoration and manipulative to have in the classroom. Oh, don't forget to finish it off with some googly eyes!

Learn more: Wilmington Island United Methodist Preschool

This is a great activity for students working at the teacher's table. Counting games like this are fun and engaging for students. Explain to them that they are helping to bring all of their family members back home.

Learn more: Hobson Preschool

Building numbers with big wooden (or plastic) numbers is a great experience for preschoolers. This is a simple hands-on activity that can be done with anyone. It will help to intertwine motor skills and number recognition skills.

Learn more: Little Millenium Techzone IV Noida Extension

There can't be a list of educational activities for preschoolers without something to do with play dough! This one is so much fun and can easily be used in a dental unit. Students will love rolling the dice and matching the dots with the number tooth, then creating the tooth out of play dough.

Learn more: Little Minds at Work

A simple board game for preschool classes everywhere. There's no doubt that students love playing with Matchbox Cars. Providing a special parking garage for them will be the perfect additional practice they need for building those number recognition skills.

Learn more: Preschool Inspirations

Hopscotch has always been a fun game, but did you know it can easily be made out of sheets of paper? Just simply use color crayons to create a large number that students can jump to. Whether you play with traditional hopscotch rules or you just let your kiddos run across and say the numbers, all will be educational.

Learn more: Joy English Preschool

Using pom poms or dot stickers, this activity can easily be implemented in the preschool classroom. Use it to go along with your Very Hungry Caterpillar unit plans! This is a bit tougher, so keep your children in mind and work with them.

Learn more: Popcorn Poppin Preschool

@brightstarsfun Spring number recognition activity #maths #numbers #toddler #learning #prek #preschool #spring ♬ 1, 2, 3, 4 - Album Version - Plain White T's

I love these super cute little flower beds. They're so fun and simple to make. Students will love playing with them in and out of math class. It can be pretty simply made with a permanent marker, some paper, and a recycled box.

Learn more: Bright Stars Fun

@beyondtheplayroom Apple Number Writing and Counting Sensory Tray for Kids. Check out @beyondtheplayroom for the Instructions on how to make the Apple Pie Scented Rice #preschoolteacher #sensorytray #preschoolactivities #countinggame #numberrecognition #finemotorskills ♬ 888 - Cavetown

A sensory activity that includes number recognition just as much as color recognition. Matching the rice to the objects being used is a great way to help students with color matching. Keep the color in one theme, from the rice, to the object, to the buttons.

Learn more: Beyond the Playroom

@.playtolearn Great valentines activity! ♥️ #fyp #foryou #craftsforkids #numberrecognition #preschoolactivities #numberpuzzle #valentinesdaycraft #toddleractivity ♬ All You Need Is Love - Remastered 2015 - The Beatles

These puzzles can be easily created with a sheet of paper and some markers. Draw dots and numbers and have students build some hearts. This will help students develop essential skills for number recognition and counting.

Learn more: Play to Learn

@jess_grant Conjure up some preschool skills with this fun counting game 🧙🏻✨ #preschoolteacher #learnontiktok #tiktokpartner #learnthroughplay #prektips ♬ Pumpkins - Chris Alan Lee

Write the recipe on little sheets of paper and watch as your students create their own little witch cauldrons. This is really a great motor activity for little hands as it works muscles that students are necessarily used to working.

Learn more: Jess Grant

@harrylouisadventures Watermelon Maths #stemeducation #toddleractivities #preschoolplay #playdough #playdoughmaking #playdoughactivities #earlymaths #mathsplay #activitiesforkids #homeschool #finemororskills #counting #numberecognition #mathsactivity #actividadesinfantiles #playbasedlearning #preschool #preschooler #toddlers #stayathomemom #mumhacks ♬ Watermelon Sugar - Harry

Dough activities like this are perfect for incorporating fruits into math class. Your students will love creating the watermelons and then counting the seeds that need to go into each watermelon.

Learn more: Harry Louis Adventures

@happytotshelf A cute monster counting activity for preschoolers! #learningisfun #handsonlearning #preschoolactivities #learnontiktok #preschoolathome #kidsactivities #counting ♬ Kids Being Kids - Happy Face Music

Create some number monsters! This is an amazing number activity for preschoolers. This is a great activity to do during circle time. Students will love instructing you on how many eyes to put on each monster. Simply use garage sale stickers to create the eyes.

Learn more: Happy Tot Shelf

@theparentingdaily Number tracing with paint #kids #kidsactivities #activitiesforkids #eyfs #learning #learningisfun #children #number #activity #activities #parenting #fun #earlyyears #preschoolactivities ♬ BARELY BREATHING - Grant Averill

Fun-filled hands-on activities often include paint of some sort. Your students will love creating their numbers with all of the different paint colors. It will be fun to watch as students use their own ideas to create the pictures from dotting their fingers to just tracing along the numbers.

Learn more: The Parenting Daily

@happytotshelf Fun fishing and number matching game! #learningisfun #handsonlearning #homelearning #preschoolactivities #finemotorskills #diygames ♬ Happy song 1 for cooking / child / animal videos(476909) - きっずさうんど

Ready to get messy? This game will surely help with the development of numeracy skills. Students will love playing in the water (dye it with different colors to make it even more exciting). They will also love the challenge of fishing out the straws and using their counting skills to put them in the right places.

Learn more: Happy Tot Shelf

@happytotshelf Can you believe that my 3yo sat down for 15 whole minutes, wrote all 10 numbers and poked 55 cotton buds? #learningisfun #handsonlearning #preschoolactivities #learntocount #homelearning ♬ Happy Mood - AShamaluevMusic

How many apples are on the tree? This helps to build the foundational skills of counting. Students will count the apples and then get some extra handwriting practice by tracing the dotted lines to create the different numbers.

Learn more: Happy Tot Shelf

@happytotshelf Download the printables at Happy Tot Shelf blog. #learningisfun #handsonlearning #preschoolactivities #homelearning ♬ Kimi No Toriko - Rizky Ayuba

This printable activity is great because it will allow students to practice their counting skills and develop various muscles throughout the hand. The best part is that students get to practice holding scissors and paper simultaneously, honing in on their bilateral coordination.

Learn more: Happy Tot Shelf

Preschool is working on number recognition with a game of red rover outside!! #TigerLegacy pic.twitter.com/yZ0l4C2PBh

— Alexandria Thiessen (@mommacoffee4) September 17, 2020

Outdoor games for children should always be at the top of your list. Being outdoors only gives students more experience and curiosity. It also gives them time to take in the fresh air and just enjoy nature.

Learn more: Alexandria Thiessen

Grab some cups, tape foam numbers on them, sort the rest of the foam numbers into them:https://t.co/lYe1yzjXk7 pic.twitter.com/Sl4YwO4NdU

— Teacher Sheryl (@tch3and3yearold) April 17, 2016

Teaching your preschoolers how to categorize will help to train them as they develop math and literacy skills. It's important for preschoolers to have enough diversity in different sorting activities, including but not limited to:

•  Numbers
• Colors
• Shapes
• Sensory

Learn more: Teacher Sheryl

Number Matching Game For The Preschool Classroom: Number Recognition, Observational Skills, & Fine Motor Skills Used 👩🏽‍🏫#Preschool pic.twitter.com/c5fT2XQkZf

— Early Learning® (@early_teaching) August 25, 2017

Simple games for children like this one are so nice to have in the classroom. These counting games are so easy to make that each child can have their own game boards! Which is essential to individuality and student, teacher interactions.

Learn more: Early Learning

Check out and make this mini-book Frog Jump for your #preschool children https://t. co/qsqwI9tPTK. It explains how to play Lily Pad, a game that helps children practice number concepts like counting (or just knowing) how many dots on the die & visualizing the number line. #ECE pic.twitter.com/o2OLbc7oCG

— EarlyMathEDC (@EarlyMathEDC) July 8, 2020

A printable activity that students will absolutely love! Friendly competition and games with animals make always make any learning activities that much more exciting. This is a great game to work on matching dots, numbers, and of course, working on turn-taking.

Learn more: Early Math EDC

Save your bread ties to make this super simple number game I call, Ghosts vs Frankenstein. Kids can take turns being either character. Roll the dice until you collect all of your numbers. #Halloween #Preschool #kindergarten #homeschooling pic.twitter.com/A9bKMjLFXM

— Mom On Middle (@MomOnMiddle) October 2, 2020

This is such a cute game! Taking turns is vital in life, and it starts in preschool! Help to incorporate games that require students to take turns and learn the pattern of communication - back-and-forth exchanges.

Learn more: Mom on Middle

This month our Rolling Rhombus visited All Ages Read Together-a local, non-profit preschool dedicated to educating children in need. 3rd graders brought math games to teach number recognition & counting. It also helps our students learn to communicate with language barriers. pic.twitter.com/ga6OJzoEf9

— St. Stephen’s and St. Agnes School (@SSSASsaints) November 19, 2021

Playing with blocks is super important in the preschool years. It teaches students so many different skills, especially in a setting with multiple kiddos. Number blocks help to get kids to feel the different shapes of numbers.

Learn more: St. Stephens and St. Agnes School

There's nothing better than a fun counting song. These songs can be classified as recognition games. They are great for helping kids to remember and visualize the different numbers with objects that they're familiar with.

Learn more: TheLearningStation - Kids Songs and Nursery Rhymes

If your preschoolers are just about ready for kindergarten, why not give them a challenging circle time activity?

Work together to play these different counting games. Pause the video to give students time to count and work through all of the numbers inside their brains.

Learn more: NoNa TV

Using sheets of paper, this counting activity can easily be recreated and used in the classroom. This is perfect for stations or seatwork. Your preschoolers may find this super funny and cute, which just makes it all the more enjoyable.

Learn more: Jady A.

I love this activity so much. It really keeps my preschoolers engaged for long amounts of time. First building their numbers out of playdough (always a win) and then poking that amount of toothpicks into the number makes it that much more enjoyable and educational.

Learn more: The Dad Lab

A dauber activity that takes away from the usual coloring and stamping activities. Help your students develop better coloring skills by providing manipulatives like pom poms (or circle stickers) to create colorful numbers.

Learn more: Childcare Land

Roll and cover is a great activity for students at all levels. This is completed both by working together and practicing turn-taking or working individually. It can also serve as an engaging informal assessment to see where your students are at in reaching the objectives.

Learn more: Childcare Land

This is super cute and will build the foundation skill of counting. Tying number recognition into button counting will help bring students to the next level of their numeracy understanding. It will also be an engaging and creative to get students involved in their learning.

Learn more: Childcare Land

A countdown chain is a daily activity that can be used for so many different things! It's one of those experiential learning aspects of the classroom. It can be used for holidays, birthdays, and even the countdown to summer vacation.

Learn more: Childcare Land

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Category: Classroom Ideas

13 Hands-On Number Recognition Games Preschoolers will Love

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Are you teaching your children to identify numbers? Here are some fun and interactive number recognition games for preschoolers and kindergarteners that you can play at home or in the classroom too.

If you’re wondering how to teach number recognition, the answer in early childhood is always through play.

Play is the natural way in which children learn. During play, children practice their skills and make sense of new knowledge and experiences. They develop early maths skills through play.

Remember that there are many aspects to learning about numbers. There is learning to count, which you can teach with number games and counting songs, and then there’s one-to-one correspondence, which is when a child reliably counts one object at a time.

Number recognition is about the physical appearance and shape of a number, as well as what value it represents.

These number recognition activities for preschoolers are a great place to start teaching the numbers from 1 to 10, but once you get going you’ll quickly notice opportunities all around you.

This numbers game can be adapted to suit your children’s age, stage and interests.

Write numbers onto some toy cars and create a parking garage with numbered spaces. Your children can then match the number on the car with the number in the space and park the car correctly.

If they need more of a challenge replace the numerals with dots or words so that your kids can begin to recognise numbers being represented pictorially.

If they are not particularly interested in cars you could do a similar game with animals, dolls, or whatever it is that they enjoy playing with.

Put numbers on toy cars, or for a large-scale activity; bikes and scooters. Create a car wash for them with clothes, brushes, water and bubbles.

Your children are then in charge of ensuring that the cars, bikes, or scooters come to the car wash and get cleaned in the correct order. As well as recognising numerals, this activity gives kids the chance to begin learning about number order.

This fairground classic is great for numeral recognition. How you set this up is your choice.

If you have lots of ducks and something to hook them with then perhaps you could create a replica of the fairground game, otherwise feel free to improvise with what you have at hand.

A net or bowl to scoop objects out of the bath could work well – the important thing is for your children to be having fun and looking at numbers. You could allocate prizes to certain numbers if you want to.

Sidewalk chalk is brilliant for larger-scale mark-making and games that get children using their gross motor skills.

Use sidewalk chalk to write out large numerals, then give kids a paintbrush and a pot of water and have them paint over the numerals with water to erase them.

Not only does this help them to recognise numerals but also helps with the beginnings of formation.

Create a chart using beads and pipe cleaners. Attach 10 pipe cleaners to a piece of card and write numbers 1-10, one number above each pipe cleaner.

Provide children with a pot of beads and help them to count out the correct number on each pipe cleaner.

This activity gives them the opportunity to practise numeral recognition, counting and assigning the correct value to each numeral. It’s also brilliant for their fine motor skills.

Label some buckets or baskets with numbers and provide your children with beanbags. Have them step back from the buckets and take aim and throw the bean bags in.

You can do quite a lot with this activity depending on your children’s age and ability, but on the most basic level, it encourages number recognition along with introducing the concept of more and less.

If your children are ready then you can model addition and play to win.

Label pots with numerals and provide counters, craft beads, pom poms or really whatever you have at hand and encourage children to fill each pot with the correct number of items.

Again, this activity targets a variety of different skills as children recognise numerals, apply their understanding of value, and count out the correct number of items. This is another good one for fine motor skills.

Children love to learn outdoors and on a large scale. Many teachers love using small number lines in the classroom to introduce the ideas of one more and one less but you can do the same outside.

Perhaps use chalk to draw out your number line and encourage children to locate different numerals – “Stand on number 8,” “Hop to number 4” and so on.

If appropriate you could discuss one more and one less. You could also use the number line to encourage counting by inviting your children to find 1 item to place next to the number 1, 2 items to place next to the number 2 and so on.

If your children like to be creative and artistic then this could work for them. Use nature to create the shapes of numbers.

This might mean drawing in the mud or sand, arranging leaves or stones or even noticing natural shapes in the environment. You could do this in your backyard or take a special walk.

Even better if you can take photos of your creations for your kids to look back on. This allows them to begin thinking about how numerals are formed in a fun and creative way.

Hopscotch is a real playground classic and it brings together a whole host of skills including gross motor skills.

Draw out a hopscotch grid and teach your children how to play, throwing a stone or stick to find out where they need to hop to, and then hopping and jumping to the end.

As well as reinforcing the recognition of numerals this also introduces the idea of higher and lower and allows kids to have fun while working with numbers.

Hopscotch is my favourite number activity for preschool kids.

If you like messy, creative play then this one’s for you.

Create a couple of ‘recipe cards’ using measurements expressed as numerals, for example – 2 cups of water and 3 pinecones, and have your children follow the recipe card, combining everything together in a big cauldron-like tub.

This taps into children’s imaginations and introduces the concept of measurement as well as numbers. Once they are finished following the recipes you have provided perhaps they will be ready to create their own recipes, which you can scribe for them.

All you need is a nice big roll of paper with numbers on it and a fly swat dipped in paint. You call out the numbers and children must swat them, thereby covering them in paint. This is a really fun preschool number activity.

You can play just as easily without the paint, simply swatting at the numerals, but it’s far less fun than making a mess. 

This activity is extremely physical helping to really embed the learning, and as children try to speed up, their ability to recognise numerals will improve too so that they’ll soon be able to recognise them at a glance.

Bingo is a great maths game for building up number awareness and can be enjoyed as a family. To start off with you can simply use numerals up to ten but as your children’s knowledge expands so can your game.

You can use what you have on hand – a bowl and folded-up pieces of paper, with highlighters – or you can go ahead and buy bingo pads and dabbers and bingo balls to add to the overall experience.

Here you will be building number recognition and as your kids aim to increase their speed, they will get quicker and quicker at recognising numbers and linking them to the number names being called out.

I hope you’ve enjoyed these number identification games for preschoolers. Here are some more fun math activities for preschoolers to build early mathematical skills.

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License plate recognition systems: programs, modules

Updated: Over the past few years, technology in video surveillance systems has undergone significant changes. More recently, motion detection, inter-frame compression, and remote access have been advances. Today nobody is surprised by real-time tracking, analytics on board an IP camera, multi-server architecture, number and face recognition. The computational power of modern computers has increased by several orders of magnitude, and this has made possible the leaps and bounds in video analysis technologies.

Video surveillance is no longer the prerogative of security services and is increasingly in demand in solving business problems. This includes counting visitors at the entrance to the store, analyzing the behavior of visitors on the trading floor, automating parking, organizing access systems for face recognition, and many others. And here, customers impose strict requirements on the reliability and reliability of the video analysis algorithms.

We decided to consider one of the most demanded tasks for business intelligence today - license plate recognition. There are many myths and misconceptions about license plate recognition: from the fact that these are all toys and only work in ideal conditions, to the fact that you can read numbers from 10 lanes of the expressway at once and at the same time recognize the faces of drivers. What should a designer of a video surveillance system who has a specific task do in this situation? How to choose equipment, how to install a camera, do you need additional lighting and what kind? How to be an engineer who needs to squeeze the maximum out of the existing equipment and hand over a working system to the customer?

Step-by-step instructions for designing license plate recognition systems in our video:

The VIDEOMAX channel regularly publishes training videos, technology demonstrations, and recordings of events.
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First of all: does license plate recognition work or not? This question can be answered by every motorist who has received by mail a receipt with a fine created by an automated system, where his number is clearly visible. The car number is made in accordance with GOST and this greatly facilitates the work of video analytics. According to the manufacturers, modern algorithms provide a 3-5% chance of error when reading the license plate. And this is in real conditions on the freeway with real numbers, which can be both dirty and crumpled. If the task is to recognize numbers at the entrance to the parking lot, where the car moves slowly, and where ideal lighting conditions can be created, then it is possible to achieve indicators up to 98-99% of correctly recognized license plates. How to achieve these indicators, and what are ideal conditions - in our article.

Tasks for the license plate recognition system

We will leave the identification of violations and fixing the numbers of violators on the roads to state bodies and specialists from related companies. Let's consider typical tasks when designing and configuring a number plate recognition system to account for vehicles at the entrance to a protected area and automate parking.

For commercial facilities, the installation of any license plate recognition system is justified either by reducing the cost of organizing a business process, or by reducing various risks and possible losses. Reducing costs when installing a license plate recognition program is, first of all, a reduction in personnel and the number of security officers involved in providing access to the territory and parking operation. Modern tools allow you to create a fully automatic system in which the operator only controls the work and intervenes in the event of an emergency.

Reduction of risks and losses is possible due to the exclusion of the human factor when making a decision on admission and obtaining a reliable report on traffic, parking occupancy, and operation of parking spaces.

There are other, still exotic, examples of the use of the license plate recognition system. So, one of our partners installed a system at the entrance to the territory of a cottage village and integrated it with the database of owners. At the entrance, an electronic scoreboard greets the resident by name and patronymic, congratulates him on his birthday or reminds him of the amount of debt on utility bills. As a result, the delay in payments was reduced to almost zero, and loyalty to the management company increased many times over.

The classic version of the operation of the license plate recognition system at the entrance to the protected area with the automation function - cameras are installed at the entrances and exits from the territory, which transmit information to the video server, a special software module searches and recognizes the number plate in the frame. Next, the number is checked against the database, and when the authorization to enter is confirmed, the system issues a signal about admission to the territory. Entry and exit algorithms can use various types of sensors, magnetic loops, control of traffic lights, barriers, etc. Management is possible both directly from the video server and as part of integration with ACS.

Camera selection and setup

The name "License Plate Recognition System from a Camera Image" itself implies that the image from a video camera is of primary importance for the quality of the system. A high-quality and clear image is possible with the right choice of a video camera, a special setting of its parameters, and the correct installation.

The key to the successful operation of the number plate recognition system is the choice of a high-quality camera and its correct settings.

Often, customers, wanting to save money, and sometimes installers, out of ignorance, try to solve the tasks of overview monitoring of the situation at the entrance to the territory and the problem of license plate recognition with one video camera. It must be clearly understood that these are two completely different tasks. To recognize license plates, you need to clearly see the car number under any lighting conditions, and everything that happens around it is not important. An overview camera should provide information about the make and color of the car, the situation at the entrance, and record the actions of drivers, pedestrians, and security personnel. It is not worth trying to combine these tasks in one camcorder. You can draw an analogy with car tires: summer tires are better for the warm season, and winter tires for the cold season. Vehicles with all purpose tires handle poorly in hot weather and skid in the snow.

Before talking about specific recommendations for choosing cameras, it is worth noting that when choosing a special device for solving a special problem, you should not put economy at the forefront.

The cost of a camera as part of solving the problem of license plate recognition is not so significant, and the devices themselves, as a rule, require much less than all other video cameras in the video surveillance system at the facility. Choose quality products from well-known brands with guaranteed performance.

Permission. More is not better

One of the most common questions is what resolution is better to use for plate recognition. The simplest answer is sufficient for accurate and reliable identification of the car number. Small resolution may cause errors and inaccurate recognition. High resolution will significantly increase the load on the computing power of the server. The main problem with high resolution is low light sensitivity due to the high density of pixels and their small size, which can make the number unreadable at night or require very powerful additional lighting. It's expensive, not always possible, and motorists won't like a spotlight that shines in their face.

The minimum license plate image size in pix in width, at which high-quality license plate recognition is guaranteed, is indicated by most manufacturers at 80pix. It looks like this:

The optimal width of the car number in pix for the best probability of correct recognition is 150-200 pix. The picture below shows the same number but at 200pix.

How does this affect camera resolution? Knowing the width of the number in pix and knowing the area where the car's license plate might appear, you can calculate the required camera resolution.

Let's try to calculate the clearance for a 4 meter wide driveway. Taking into account that there are numbers installed on the side, we will assume that there can be a number in the entire range of the width of the passage. The size of the number is 520mm. Let's take 150 as an acceptable width in pix. Camera resolution will be:

(4/0.52)*150pix=1154pix

This corresponds to the HD camera resolution of 1280x720. If the passage width is larger, then an increase in resolution to FullHD will be required. Installing a camera with a resolution higher than FullHD 2Mpix is ​​not practical. In most cases, already 2Mpix requires additional lighting.

If, as a result of calculations, you get that a resolution of 1 Mpix will be enough for you, you should not use a 2Mpix camera. The quality of recognition in this case may not improve, but even worsen, because The light sensitivity of a 2Mpix matrix is, by definition, less than that of a camera with a 1Mpix matrix, and at night, noise may appear that will complicate the work of license plate recognition algorithms.

Here's what you should pay special attention to, so it's the size of the matrix.

The larger the matrix, the more light will fall on each pixel and the more contrast and clear the picture will be.

Among the common camera models on the market, the sizes of matrices 1/2", 1/2.5", 1/3". 2 times, but the first ones require a special lens.

Lens. Key Factor

What is required from the lens? It must provide image sharpness at any time of the day, its focal length must correspond to the required viewing angle, and it must transmit as much light as possible to the matrix in the dark. Lens aperture is a key parameter that determines the image quality for recognition. In lens specifications, this is the F-number. This value is indicated in the form F / 1.4 or F = 1: 1.4. The F / 1.2 lens has a larger aperture than F / 1.4. We do not recommend using lenses with apertures less than f/1.4.

Image formation on the matrix is ​​provided primarily by the lens, and the initial result depends on its parameters.

The focal length is selected based on providing the required viewing angle, depending on the location of the camera and the distance to the place where it is necessary to recognize license plates. To do this, the easiest way is to use the numerous calculators that can be found on the Internet. It should be borne in mind that the angle of view also depends on the size of the camera's matrix, and the data on the angle of view in the characteristics of the lens are indicated for reference and for a certain size of the matrix.

Should I use a varifocal or fixed focal length lens? There is no clear answer here. The varifocal lens is very convenient for both the designer and the installer, it allows you to adjust the viewing angle at the location of the camera. But it also has a number of disadvantages: always a lower aperture compared to a fixed one, high cost (a high-quality optical system of such lenses cannot be cheap), defocusing over time. If you know exactly where and how the camera will be installed, then a properly calculated and well-chosen prime lens will give the best results. But if the project is a sketch and specialists have to look for a place where to mount the camera, then it is better to install a varifocal lens with a wide range of focal length adjustment.

If the camera will work outdoors and in conditions of highly variable illumination, then the lens must be equipped with ARD.

If you plan to use IR, then you will need an IR-corrected lens to ensure that the image is sharp both day and night when the IR illuminator is on.

Other options. Special settings for all conditions

If you look at the description of camera parameters, you can see a lot of characteristics, values ​​of different parameters, image processing algorithms. Most of them are aimed at making the picture pleasant for the operator of the video surveillance system. If we talk about license plate recognition, then the image should not be "pleasant" or "beautiful". It must be machine-readable.

In this regard, we highlight the main parameters that are worth paying attention to, and note those parameters that are not important, and sometimes even hinder high-quality recognition.

The most important camera parameters required for the license plate recognition task are:

• shutter adjustment
  the main parameter that allows you to set or limit the shutter speed (shutter, shutter speed). This is necessary so that the number in the frame is not blurred when the car is moving. Fixing the shutter speed can lead to noise in the dark, but recognition algorithms can cope with them, but nothing can be done with a blurry number. In order for the image to remain high-quality during daylight hours, you need to choose devices for which you can limit the maximum shutter speed, but leave the possibility of adjusting it from the camera. The electronic shutter speeds for quality license plate recognition are 1/500 for vehicles moving up to 40 km/h and 1/1000 for speeds over 40 km/h. If you have a stop line, a speed bump, a barrier in front of which the car will definitely stop, and at the same time powerful lighting in the recognition zone, then you can set the shutter speed to 1/250 of a second.
• number of c/s
  the greater the number of fps, the more times the recognition algorithm will be able to read the number plate during the passage of the car. Please note that some software systems have separate licenses for recognizing slow and fast moving vehicles. In the first case, they make a selection from a video sequence of a limited number of frames. In this regard, it is recommended: 3-8 fps - the optimal number of fps for recognition of license plates when driving at low speeds (up to 40 km/h), 25 fps - for recognition of license plates of fast moving vehicles (up to 100 km/h). h or more). A larger number of fps causes an additional load on the recognition algorithms, which does not lead to an increase in the quality of the system.
• format, compression ratio
  this parameter is applicable for IP video cameras and will be discussed in more detail below. The H.264 format requires preliminary decoding and introduces a time delay, but allows you to transmit a high-quality image with a minimum channel bandwidth. MJPEG allows you to reduce the load on decoding for the operation of the license plate recognition module, but significantly loads the LAN. The compression ratio should be set to the minimum. If the LAN is dedicated and the system is built from scratch, then it is more correct to use MJPEG.
• light sensitivity (minimum illumination)
  an important parameter, but its absolute value when comparing several manufacturers does not make sense, because There is no single methodology for measuring minimum illumination. By this parameter, you should compare cameras from the same manufacturer. The higher the light sensitivity, the better the image you can get in the dark

Other settings may also affect image quality for license plate recognition and should be configured locally, depending on specific operating conditions. For example, ARD may be useful in sunny weather, but at night, in the headlights, the diaphragm may close, and the number will go into the shade. In this case, the ARD makes sense to fix. Similarly, with other parameters that affect the image.

What can hinder high-quality license plate recognition:

• WDR
  There are two options for implementing WDR - software and hardware. The hardware mode gives the best results, but the essence of both algorithms is to make the image pleasant for a person, and a person perceives information not in freeze frames, but in a stream. Machine vision, on the other hand, deals with each frame separately, and problems can arise with WDR enabled. The algorithm combines frames with different shutter speeds and thereby brightens dark areas and darkens overexposed ones. It is not known which area the number will fall into, and on a freeze frame it may turn out to be blurry.
• accumulation modes (DSS, Sens-Up)
  This mode is actively used to improve image quality in the dark. Its essence lies either in the accumulation and overlay of several frames to increase the brightness of the image, or in combining several pixels into one for the same purpose. In the first case, we get a blurry number, in the second - a low resolution.
• color
  a color image is pleasing to the eye and carries important information about the object in the frame for the observer. But for license plate recognition, color is not only unnecessary, but even harmful. Ceteris paribus, switching the camera to b/w mode improves the quality of the license plate recognition algorithm.

Any parameters and modes in the camera settings can affect both negatively and positively, and must be set individually in each case. It is important to understand the mechanism of operation of a particular mode and the influence of a particular parameter. You can consult Videomax technical support on setting up the camera for license plate recognition.

Analog, IP or something else?

Here it is more correct to oppose the IP camera to everything else. The IP camera transmits the compressed data via LAN to the processing device. As a result, many problems arise:

• delay
  when using IP cameras, the time delay from the moment the car came into the camera’s field of view to fixing the license plate number consists of the time for processing and compressing data inside the camera, transmitting over the LAN, decoding data on the server, and processing by recognition algorithms. The delay can be up to 1 s or more. In some situations, this can be critical, especially when the delay for controlling the actuator is added to this. As a result, the cycle of passage of the car to the territory is significantly slowed down. And this becomes critical when you need to quickly respond and block the road for the offender. At a speed of 100 km/h, a car travels 28 meters in 1 second.
• quality
  in order to transmit data over the LAN, they need to be compressed. Compression without a certain level of information loss is impossible. In this regard, the image for the work of the recognizer comes with a certain level of degradation, which in some situations can play a significant role.

What about analog CCTV cameras? They are devoid of the listed shortcomings, but they have a significant disadvantage - low resolution. Image resolution after digitization is available up to 704x288. Thus, the width of the view area according to the criterion of at least 150 pixels per car number is limited to 2.5 m, which, of course, is very small. In this situation, one has to either put up with the fact that for some vehicle trajectories there may be problems with reading numbers or install two or more video cameras on one passage.

New standards in video surveillance, such as HD-SDI, HD-CVI, HD-TVI, AHD, allow you to receive high-resolution images in real time.

The main problem of these standards is that video capture cards are either absent or not integrated into video analysis software systems due to low demand. The new standards remain largely the preserve of smaller DVR-based video surveillance systems.

There are also special machine vision cameras that operate on special protocols and transmit "raw" data without any compression to a receiving device for processing. These devices are used in specialized video recording complexes, and the cost of such solutions is extremely high.

Ultimately, for commercial facilities and solving ordinary business problems, you have to return to IP cameras again and try to get the best result, taking into account all the features of IP video surveillance. To minimize latency in data encoding and LAN transmission, it makes sense to set the compression type to MJPEG. To minimize compression loss, set the compression ratio to the lowest level. H.264 can be used as a second stream for archiving.

Despite the fact that analog CCTV standards are best suited for number recognition, IP cameras are still used more often for recognition due to the lack of video capture cards for new standards for server equipment.

When using IP cameras for license plate recognition, you should be careful when calculating and designing the LAN. With limited bandwidth from the camera to the server, image quality problems, delays, and skips can occur. Under these conditions, license plate recognition will not work well.

Camera location

The choice of the camera installation location for successful license plate recognition is no less important than the choice and configuration of the camera itself. The camera must be located outside the area of ​​​​illumination by headlights of cars. It should not be too far away, otherwise vibrations may affect the image due to the long focus. The camera must not be too close, otherwise unacceptable perspective distortion of the number will occur.

Basic requirements for installing a license plate recognition camera:

• installation height within 2-6 meters depending on the distance to the detection zone of the number
• camera tilt angle not more than 30 degrees in the vertical plane, and not more than 20 degrees in the horizontal
• license plate angle relative to the horizon ±5 degrees
• The camera must be installed on the right or left in the direction of travel of the vehicle, but not in the center. The installation structure must not be subject to vibrations and swaying

The classic version of the camera installation: height - 3 m, distance to the control zone 11 meters. The angle in the vertical plane in this case is 15 degrees, in the horizontal - up to 10, with a passage width of 4 meters.

It should be borne in mind that the barrier creates an exclusion zone, within which the number is blocked by the barrier boom. In the above example, the stop line should be placed on the border of the exclusion zone or behind it, but no closer than 3-4 meters from the barrier.

For license plate recognition systems at the entrance to the territory of the enterprise and to the parking lot with a low vehicle speed, a deviation from the specified viewing angles is permissible: up to 25 degrees in the vertical and horizontal planes. Practice shows that this does not greatly affect the quality of recognition when other recommendations are followed.

Additional lighting for license plate recognition

There is no such thing as a lot of light for video surveillance. Additional lighting at night can significantly improve the quality of license plate recognition and will effectively combat backlight from car headlights.

The formal requirement of manufacturers of license plate recognition systems is at least 50 lux in the license plate recognition area. But keep in mind that this value is highly dependent on the parameters of the cameras that you have chosen. If a camera with a large matrix, high light sensitivity, fast lens is selected and it is correctly configured, then you can get the maximum probability of correct recognition already at 20 lux. However, if there is no additional lighting at the checkpoint of the object at all, then license plate recognition will be impossible.

According to regulatory documents, the illumination of transport highways should be in the region of 15-20 lux, and on local streets - 4-6. It turns out that we can hardly do without additional lighting. Illumination can be in the visible range (ordinary lighting spotlight) and in the IR range, invisible to human eyes.

• use of floodlights
  Ordinary floodlights do an excellent job of creating additional illumination in the area of ​​license plate recognition and are not expensive. However, bright lighting can create discomfort for vehicle drivers, especially when the lighting is spotlight and directed towards the movement of the car.
• use of IR illuminators
  IR illuminators are produced with wavelengths of 770-880 nm and 930-950. The former manifest themselves in the form of a barely noticeable red glow, the latter are absolutely invisible to the human eye. The sensitivity of camera matrices is greater at wavelengths of 770-880, and it makes sense to use such spotlights as additional spot lighting in license plate recognition systems.

Excellent results are obtained when visible light and additional IR illuminators are combined. Conventional spotlights are installed in a standard way on lighting poles or on adjacent buildings and create even and comfortable lighting for the driver. Narrow beam IR illuminators are installed next to the video camera. In most cases, the power of an additional IR illuminator of 20 W is sufficient.

When using IR illumination, remember that in this case the camera must be switched to b/w mode.

A little about IR-illumination in one case with a video camera. It is convenient to install and does not require adjustment - the IR beam is always in the same axis as the viewing angle. But if the additional heating created by LEDs with IR radiation in the cold season can even be useful for the camera, creating heating, then in hot weather the heat from IR LEDs leads to excessive heating of the camera matrix and introduces additional noise in the image. It is recommended to use an external IR illuminator to obtain stable results in any season and in any weather.

License plate recognition software selection

Today, a large number of ready-made license plate recognition systems, both imported and domestic, are presented on the market. The price range for one channel is from 10 tr. for the simplest number plate fixing systems at low speeds and up to 100 tr. for license plate recognition modules at high speed on the motorway as part of integrated security systems.

The quality of recognition in most products is at a fairly high level. Get recognition probability above 95% on real traffic in real conditions is possible on any product on the market. The capabilities of the license plate recognition algorithm itself are similar, and in most cases the module does not even require additional configuration. All differences are in additional functions and implementation of non-standard algorithms.

If you need to create a system for fixing car numbers at the entrance and exit from a protected area, and the probability of recognition at the level of 95% is quite acceptable, and integration into an existing security system is not required, then you can choose any product from any manufacturer that has high-quality support in Russia.

If you are building a security system for a large facility, if you need to implement the complex logic of interaction between the license plate recognition system and the control of executive devices, perform integration with third-party license plate databases, and you need a probability of correct recognition close to 98-99%, then it makes sense to pay attention to full-featured complexes that integrate a video surveillance system, number recognition, access control systems and allow you to implement non-standard logic of work through macros and internal programming.

License plate recognition module setting

If all the requirements for the camera and its installation, set out earlier in this article, are met, then the most important and first thing to do before setting up the license plate recognition module is to make sure that an image suitable for recognition is coming from the video camera:

• The minimum number size in the recognition area is at least 80pix in width. This can be done using the pixel counter on the IP camera or, knowing the camera resolution, calculate the width of the observed space in meters at the place of license plate recognition and taking into account the license plate width of 520 mm. It is better if the number on the image is around 150pix
• the freeze frame must be clear and sharp. To do this, you need to look frame-by-frame in the archive the movement of the car in the license plate recognition zone. The number must be clear. Any smearing or vague image of the number is unacceptable.

In most cases, even with a large number of various parameters, the license plate recognition module does not require additional settings. Typical minimum settings that need to be made regardless of the used license plate recognition software:

• number size
  depending on the software product, the average number size or the minimum and maximum are set. Often this can be done right on the freeze frame by overlaying a polygon with the size of the number on the image with the real number
• setting of search area for number
  if the camera is installed and configured in such a way that there are areas in the image in which the license plate number cannot appear, it is recommended to reduce the search area for license plates
• fixing numbers in a given direction of movement
  if you have separate cameras for entry and exit, then it makes sense to indicate the direction of movement "from the camera" or "towards the camera" to fix the numbers. In this case, the load on the server for recognition is reduced, and there will be no unnecessary information in the event log from the recognizer.

Setting up a number search zone can significantly reduce the load on the server of the video surveillance system.

All other additional settings, which abound in recognition modules from various manufacturers, affect the quality of recognition, but in most cases they are set to optimal values. They should only be changed at the direction of the manufacturer's technical support, when all other possible sources of problems have been eliminated.

Entry automation software capabilities. Solving related problems

Each installation of the license plate recognition system is unique and requires detailed study. Often, the installer has to solve many related tasks. Among them: control of executive devices, integration with third-party databases, parking automation and others. Below are typical tasks that our partners approached us with and which we successfully solved together with software manufacturers.

• Entry and exit detection with one video camera
  If at the facility you only need to record the numbers of incoming cars and do not need to control executive devices, then you can get by with one camera for both entry and exit. In most cases, software systems can determine the direction of movement and make an appropriate entry in the protocol. Thus, the customer receives information from one video camera about all the numbers of cars that have passed through the checkpoint both for entry and exit. Check with the software manufacturer or Videomax technical support about this possibility
• Management of executive devices, integration with ACS
  One of the most common tasks that our partners deal with and which is required from the license plate recognition system is to control the executive device upon the fact that the car number matches the number in the database. Control is possible directly from the video server using special I/O devices, from control outputs on an IP camera, or by transmitting a control signal to an integrated access control and management system if the executive device is part of the object's ACS. Check with the software manufacturer or Videomax technical support about this possibility. One of the implementation options is described in the reference manual for engineers "Opening the barrier by a recognized vehicle number". Attention! It should be taken into account that the probability of correct recognition in a well-mounted and configured system is very high and reaches 99%, but nevertheless it is not 100%. It will not be possible to create a fully automatic access system based on license plate recognition; there will always be cars whose license plate is illegible, missing, dirty, crumpled, etc. It is necessary to provide for the possibility of communication between the driver of such a vehicle and the system operator.
• 100% of all entrants
  The recognition probability of 99% is a very good indicator, but in situations where the number plate could not be recognized, and the car needs to be allowed into the territory, we get unaccounted for transport. If the customer requires 100% accounting of all incoming vehicles, it is necessary to fix the numbers in the system, including in manual mode. We described one of the options for implementing this task in the reference manual for engineers "Recognition of plates and accounting for 100% of incoming cars."
• Vehicle Counting
  There is a task when it is important for the customer to know how many cars are currently in the territory, the parking lot, how many and which cars have entered, and how many of them have left the object. Not every software allows you to implement this feature. One of the problems in the implementation of the counting system is the desynchronization of data when the car falls into the same 1% of unrecognized numbers. In this case, the system should be able to enter vehicle data manually, similar to the task with 100% of recognized vehicles.
• Integration with a third-party license plate database
  Often, our partners are faced with a situation where the customer already has some kind of information base, which contains the numbers of cars that are allowed or prohibited from entering. The customer sets the task of using his database when checking the license plate for the admission of vehicles or synchronizing data with the database in the number recognition system. This is possible and has been repeatedly implemented by our partners. One of the classic examples is a cottage settlement and a list of cars of living people. A typical requirement of the customer is to automatically block the access of the non-paying car.
• Entry of a group of cars into a limited number of parking spaces
  Parking spaces, especially in comfortable business centers in large cities, are quite expensive and are always in short supply. Some landlords offer a limited number of parking spaces per organization. If you tie one parking space to one car, then there is no problem, but the demand for such parking spaces may be limited. Parking spaces are in much greater demand, where the lessor can park any of his cars. Some software systems allow you to implement logic when the system knows which numbers are assigned to which organization and counts the number of parking spaces occupied by these cars. If you try to enter another car from those that are allowed to enter from the tenant, in excess of the seats occupied by him, the system will issue a refusal. Check with the software manufacturer or Videomax technical support about this possibility.

We have given several examples with typical requests for additional functions to the license plate recognition system. This list is far from complete and every day we face new interesting tasks. If you have a special requirement and you do not know how to implement it, please consult Videomax specialists. We will definitely find the best solution, debug the implementation at the stage of developing a design solution, and help in setting up the facility. We are responsible for the proposed solutions and are ready to share our experience and knowledge. Contact us, we are always happy to help.

The help of professionals with experience in implementing license plate recognition systems will allow you to correctly choose a design solution, design a system, configure and launch license plate recognition. Call Videomax for any questions related to the creation of a license plate recognition system.

Video server configuration calculation for license plate recognition

The calculation of the station part of the video surveillance system for the tasks of video analytics is atypical and always requires an individual approach. A common mistake is when a server is selected based on typical video surveillance tasks and the cost of a license for license plate recognition is added. As a result, the server at the site is overloaded, there are gaps in the processing of data from recognition cameras.

When calculating the load on the server part, it is necessary to take into account many factors: camera resolution, the format and size of the information flow for car recognition, the number of cameras for recognition per server, etc. Having extensive experience in calculating systems for video analytics, Videomax technical specialists are always ready to assist in the selection of the station part of the video surveillance system and provide advice on any issues related to the design and configuration of license plate recognition systems.

Bonus for the most attentive readers and inquisitive minds: Equipment testing report for the license plate recognition system

the main rules for setting up the license plate recognition system for vehicles



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Author: Natalia A.

Parent category: Blog svisitom

Category: New Features

Published: December 23, 2020

Views: 1983

High-quality recognition of license plates, or state registration plates (GRZ), is a function that has become common in access control systems (ACS) over the past couple of years. The range of tasks solved by the use of GRZ is constantly expanding, especially with the development of web services. As a result, security is improved, business processes are optimized, resources are released, and therefore money is saved. In addition, in the eyes of the drivers of guest, official vehicles, the image component of the object wins. Any user familiar with auto-recognition of the GRZ, when choosing a parking lot, will give preference to one that is equipped with the latest technology, and not just blocked by a barrier.

However, for all the attractiveness of the new recognition algorithms, many still rightly doubt their effectiveness and accuracy, and some are disappointed by the bitter experience of unsuccessful implementation. How difficult is it really to install and set up a GRZ recognition system with the necessary and sufficient, and most importantly, manageable recognition quality? No matter how simple it may sound to implement auto-recognition in advertising brochures, there are several conditions that must be taken into account, regardless of the manufacturer of the system and the place of installation.

1. Camera mounting angles relative to the recognition zone When installing a video camera, the installation location and angles are important. For GRZ, a separate camera is required, the task of which will be to recognize numbers. The picture, namely the license plate, must be in the focus of the video camera.
   • Number plate rotation angle relative to the center without loss of recognition quality up to 20°;
   • Angle of rotation in the horizontal plane without loss of recognition quality up to 35°;
   • Vertical tilt angle without loss of recognition quality up to 50°;

Horizontal rotation angle of about 60°. Number plate recognition works, errors are possible.

2. Resolution of the GRZ plate in the frame The optimally selected resolution of the video camera will allow you to get a clear picture and will not overload the ACS system. The image of the license plate must be placed in the center of the frame (without distortion) with a resolution of at least 95 pixels horizontally. The simplest way to count pixels is to zoom in on the full screen of your monitor and see each pixel to count.

The GRZ resolution of 78 pixels is easy to read in the enlarged still image.

3. Correct setting of shutter speed and lens depth of focus. Backlight When installing a video camera at a distance of 5 meters, you must take into account the loss of aperture and depth of focus when using zoom. Please note that a camera with a fixed lens provides better results due to the greater aperture. In the absence of a preliminary plan for installing the camera, a varifocal lens will be relevant, providing a large flux of aperture. Shutter speeds vary with vehicle speed and range from 1/500 to 1/4000 seconds. For example, a low-end camera with IR illumination, at night, without additional lighting, will cope with license plate recognition at speeds up to 15 km / h.
4. Illumination IR, day/night light
   
   At any time of the day, the GRZ system requires quality lighting. Required illumination for license plate recognition in the working area of ​​the system should be at least 50 Lux, preferably 100-120 Lux. At night, it is required to use additional lighting in the form of a spotlight or IR lighting. The place of installation of additional lighting is chosen carefully, as a rule, above the main kegel of the luminescence of the low beam headlight, so as to exclude the illumination of the number plate. If the camera installation location is predetermined and it is not possible to avoid light in the frame, we recommend using an infrared cut filter in the range of 840-900 nm using a spotlight emitting in the appropriate infrared range.

License plate recognition under given lighting conditions is possible.

5. The degree of contamination of the GRZ The recognition system of the GRZ is static, in contrast to the surrounding conditions. Road dirt, snow sticking to the license plate plate of a car can make recognition difficult or even impossible. Using algorithms for optimizing the detection and validation of symbols of our own design, we significantly reduce the dependence of the quality of recognition on the degree of contamination of the license plate, especially if the number is entered in the database of the ViCAR device. In extreme cases, our information LED light board will help for infographic notification of drivers, for example, with the output of a test message "GRZ pollution. Driver, wipe the number!"

Recognition of the number entered in the database is possible.

Number recognition is not possible.

6. Difficult weather conditions Depending on the current weather, precipitation: rain, snow, fog, as well as dust and smoke can interfere with the quality of recognition, reducing the quality of the image from the video camera and slowing down the recognition process. Such working conditions require additional compensation in the form of special machine vision cameras and mathematical analysis algorithms, which we can offer upon request. And it will not be superfluous to have regular scheduled maintenance of all external ACS systems.

In view of the requirements listed above, the use is really a pleasure for both the administration of the facility and drivers who have the right to enter the territory.

Where license plate recognition may be needed:

• Car parks of any size;
• Enterprises and factories;
• Storage areas;
• Closed cottage settlements;
• Various cooperatives;
• Park areas, etc.

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