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You are here:Home » Traffic-Sign Recognition : Basics

By Abhishek Ghosh August 7, 2019 12:59 am Updated on August 7, 2019

Traffic-Sign Recognition : Basics

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Traffic-Sign Recognition (TSR) is a part of Advanced Driver-Assistance Systems (ADAS). Traffic-Sign Recognition (TSR) helps the vehicles to recognize the traffic signs on the road. The signs can be speed limit, school children, turn ahead, speed breaker and so on. The Traffic-Sign Recognition systems are increasingly being used for road traffic safety by helping the drivers by automatic alerts on the roads. This technology is being developed by a variety of automotive manufacturers incorporating microcontroller and microprocessor based image identification and processing techniques to detect the traffic signs. The methods can be colour-based, shape-based and learning based methods.

Traffic-Sign Recognition

There is the Vienna Convention on Road Signs and Signals which gives standardized traffic signs across 52 countries. Even the countries which not signed, actually use quite closer systems. It is obvious to the readers that various commercial systems exist for cars.

The Advanced Driver Assistance Systems (ADAS) including automated Traffic-Sign Recognition (TSR) has been implemented using Raspberry Pi 3 and OpenCV. OpenCV (Open Source Computer Vision Library) is an Application Programming Interface (API) developed by Intel for image processing and computer vision. OpenCV library is a collection of algorithms and C/C++ functions. There is active development for C, C++, Python.

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autopi.io has a Raspberry Pi based OBD dongle. The dongle has embedded 3-axis accelerometer, 4G/LTE connectivity, GPS and almost all the sensors a typical smartphone these days have. I never purchased AutoPi but their website has texts and images on how the system can read traffic signs and warn about hazards. Look at this detailed article for understanding the workflow for coding part :

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https://chsasank.github.io/keras-tutorial.html

I also noticed some works with IBM Watson and Jupyter Notebook :

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https://dataplatform.cloud.ibm.com/analytics/notebooks/fb588e1e-88bc-41ff-b905-35e37bed0365/view?access_token=30a9cd9e10b4fd977bd1c83d658537d68c9664f014a1773954f01395ac9a493e

The model above has an accuracy of 20%. That is possible because the images were too much compressed. There are some research papers available on the internet which has discussed the topic Traffic-Sign Recognition with Raspberry Pi. The thing still is not mainstream and not heavily improved.

It is worthy to mention that there are some Android Apps including Roadly dashcam & speed camera :

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https://play.google.com/store/apps/details?id=ru.roadar.android&hl=en_IN

MoonBot Kit Based on ESP32-WROOM-32 supports recognizing Traffic Signs.

This is the end of the basics of Traffic-Sign Recognition. In future, we will try to use various DIY technologies in an effort of detecting the speed limits.

Tagged With sign recognition systems safety , how does traffic sign recognition work , traffic signs recognition android , traffic sign recognition system git hub , traffic sign recognition laser system , Traffic Sign Recognition (TSR) , traffic sign recognition , sign traffic recognition api , sign recognition goal , sign recognition apps
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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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