4.3 Ball Recognition

4.3.1 Algorithm

It determines whether there is an orange ping-pong ball or a green tennis ball in the image. If yes, it returns their coordinates, size and label value.

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4.3.2 Classification Label

Label ID	Definition
1	ping pong (orange)
2	tennis (green)

Ping pong:

Tennis:

4.3.3 Code Blocks

1. recognizes the detected ball is ‘Table Tennis’ or ‘Tennis’.

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4.3.4 Test Code

1. In the code start-up, set the serial port baud rate to 9600, and then set the communication mode of the AI vision module to I2C, and finally set it to run in Ball mode.

2. The if block determines the number of detections. Only when the number of detections is greater than 0 will the data be output. Note to choose Ball.

3. The serial port outputs the label value of the detected ball without wrapping.

4. recognizes the detected ball and the serial monitor outputs the ball name.

Complete code:

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4.3.5 Test Result

After uploading the code, the module will detect the area captured by the camera. If an orange ping pong or a green tennis is detected, it will be recognized, and its label value and name will be displayed on the serial monitor.