Traffic Sign Detection

In addition to color, face detection, PiCar-X can also do traffic sign detection.

Now let’s combine this traffic sign detection with the line following function. Let PiCar-X track the line, and when you put the Stop sign in front of it, it will stop. When you place a Forward sign in front of it, it will continue to move forward.


  1. PiCar will recognize 4 different traffic sign models included in the printable PDF below.

  2. Set ref to () block is used to set the grayscale threshold, you need to modify it according to the actual situation. You can go ahead and run Test Grayscale Module to see the values of the grayscale module on the white and black surfaces, and fill in their middle values in this block.



  • You can write the program according to the following picture, please refer to the tutorial: How to Create a New Project?.

  • Or find the code with the same name on the Examples page of the EzBlock Studio and click Run or Edit directly.

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