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  • 用像素点大小作为led灯亮的颜色种类,怎么不行



    • 0_1617942789592_)EFV)%K}{SL66E)T7NJ8~KL.png
      希望解答,实在不明白



    • # Blob Detection Example
      #
      # This example shows off how to use the find_blobs function to find color
      # blobs in the image. This example in particular looks for dark green objects.
      
      import sensor, image, time, pyb
      
      # 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.
      
      # For color tracking to work really well you should ideally be in a very, very,
      # very, controlled enviroment where the lighting is constant...
      green_threshold   = (76, 96, -110, -30, 8, 66)
      size_threshold = 2000
      blue_led = pyb.LED(3)
      green_led = pyb.LED(2)
      red_led = pyb.LED(1)
      
      def find_max(blobs):
          max_size=0
          for blob in blobs:
              if blob[2]*blob[3] > max_size:
                  max_blob=blob
                  max_size = blob[2]*blob[3]
          return max_blob
      
      while(True):
          clock.tick() # Track elapsed milliseconds between snapshots().
          img = sensor.snapshot() # Take a picture and return the image.
          blobs = img.find_blobs([green_threshold])
          if blobs:
              max_blob = find_max(blobs)
              xiangshu = max_blob.blob[4]
              img.draw_rectangle(max_blob[0:4]) # rect
              img.draw_cross(max_blob[5], max_blob[6]) # cx, cy
              if xiangshu > size_threshold
                          red_led.on()
              else:
                          blue_led.on()                   
              
          else:
              green_led.on()
      
      

      我单独运行颜色检测也可以,单独运行led灯也行,合在一起就是不行了



    • 43行if没有冒号