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  • 我们只解决官方正版的OpenMV的问题(STM32),其他的分支有很多兼容问题,我们无法解决。
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  • 色块寻找?求没找到色块发送个0?



    • # Single Color RGB565 Blob Tracking Example
      #
      # This example shows off single color RGB565 tracking using the OpenMV Cam.
      
      import sensor, image, time, math
      
      threshold_index = 0 # 0 for red, 1 for green, 2 for blue
      
      # Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max)
      # The below thresholds track in general red/green/blue things. You may wish to tune them...
      thresholds = [(30, 100, 30, 127, -40, 60), # generic_red_thresholds
                    (15, 40, -10, 40, -50, 20), # generic_block_thresholds
                    (60, 80, 0, 64, -10,40)] # generic_blue_thresholds
      
      
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)
      sensor.skip_frames(time = 1000)
      sensor.set_auto_gain(False) # must be turned off for color tracking
      sensor.set_auto_whitebal(False) # 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. "merge=True" merges all overlapping blobs in the image.
      
      while(True):
          clock.tick()
          img = sensor.snapshot()
          for blob in img.find_blobs([thresholds[threshold_index]], pixels_threshold=400, area_threshold=500, merge=True):
              # These values depend on the blob not being circular - otherwise they will be shaky.
              if blob.elongation() > 0.5:
                  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)
      
          try:
              print(threshold_index,blob[4])
          except NameError:
              print(1)
          threshold_index=threshold_index+1
          if threshold_index>1:
              threshold_index=0
      
      

      我是多色块寻找,返回色块颜色和大小,但是blob【4】这个变量无法更改,更改就报错,我试过del blob也没用,
      try函数是第一次没找到报错用的!
      最后效果想的是如果没找到色块,返回个0就好
      求大佬帮助啊



    • blobs = img.find_blobs()
      if blobs:
          for blob in blobs:
              xxxx
      else:
          print(0)