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  • 在小球测距的时候,视野多出一个小球,如何保持测的是第一个小球



    • import sensor, image, time

      For color tracking to work really well you should ideally be in a very, very,

      very, controlled enviroment where the lighting is constant...

      yellow_threshold = ( 56, 83, 5, 57, 63, 80)

      You may need to tweak the above settings for tracking green things...

      Select an area in the Framebuffer to copy the color settings.

      sensor.reset() # Initialize the camera sensor.
      sensor.set_pixformat(sensor.RGB565) # use RGB565.
      sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
      sensor.skip_frames(10) # Let new settings take affect.
      sensor.set_auto_whitebal(False) # turn this off.
      clock = time.clock() # Tracks FPS.

      K=5000#the value should be measured

      while(True):
      clock.tick() # Track elapsed milliseconds between snapshots().
      img = sensor.snapshot() # Take a picture and return the image.

      blobs = img.find_blobs([yellow_threshold])
      if len(blobs) == 1:
          # Draw a rect around the blob.
          b = blobs[0]
          img.draw_rectangle(b[0:4]) # rect
          img.draw_cross(b[5], b[6]) # cx, cy
          Lm = (b[2]+b[3])/2
          length = K/Lm
          print(length)


    • https://singtown.com/learn/49239/

      程序里是追最大的色块,也就是最近的小球。