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  • 在那个多颜色识别示例里,如何能把识别到的多个颜色区域的多个blob分别打印出来



    • 想识别多个色块,现在可以识别3个色块了,但是怎么获得三个色块的参数呢

      from pyb import UART
      from pyb import Timer
      import sensor, image, time, math,json,pyb
      
      # Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max)
      # The below thresholds track in general red/green things. You may wish to tune them...
      thresholds = [(30, 100, 15, 127, 15, 127), # generic_red_thresholds
                    (27, 100, -69, -44, -32, 33), # generic_green_thresholds
                    (0, 100, -63, -16, -74, -27)] # generic_blue_thresholds
      # You may pass up to 16 thresholds above. However, it's not really possible to segment any
      # scene with 16 thresholds before color thresholds start to overlap heavily.
      
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)
      sensor.skip_frames(time = 2000)
      sensor.set_auto_gain(False) # must be turned off for color tracking
      sensor.set_auto_whitebal(True) # must be turned off for color tracking
      clock = time.clock()
      
      # Only blobs that with more pixels than "pixel_threshold" and more area than "area_threshold" are
      # returned by "find_blobs" below. Change "pixels_threshold" and "area_threshold" if you change the
      # camera resolution. Don't set "merge=True" becuase that will merge blobs which we don't want here.
      uart = UART(3, 115200)
      
      while(True):
          clock.tick()
          img = sensor.snapshot()
          for blob in img.find_blobs(thresholds, pixels_threshold=200, area_threshold=200):
              # These values depend on the blob not being circular - otherwise they will be shaky.
              if blob.elongation() > 0.1:
                  img.draw_edges(blob.min_corners(), color=(255,0,0))
                  img.draw_line(blob.major_axis_line(), color=(0,255,0))
                  img.draw_line(blob.minor_axis_line(), color=(0,0,255))
              # These values are stable all the time.
              img.draw_rectangle(blob.rect())
              img.draw_cross(blob.cx(), blob.cy())
              # Note - the blob rotation is unique to 0-180 only.
              img.draw_keypoints([(blob.cx(), blob.cy(), int(math.degrees(blob.rotation())))], size=20)
              #output_str="[%c,%03d,%03d]" % ('Y',blob[0].cx(),blob[0].cy()) #方式1
          print(blob)
          print(clock.fps())
      




    • @kidswong999 嗯嗯 谢谢了