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  • 能不能识别不同阈值的颜色,并且返回一个数值,同时返回这个颜色的中心坐标,我很慌不知道该怎么办



    • # Multi Color Blob Tracking Example
      #
      # This example shows off multi color blob tracking using the OpenMV Cam.
      
      import sensor, image, time
      
      # 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
                    (30, 100, -64, -8, -32, 32), # generic_green_thresholds
                    (0, 15, 0, 40, -80, -20)] # 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(False) # must be turned off for color tracking
      clock = time.clock()
      list1=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
      list2=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
      
      # 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.
      
      while(True):
          clock.tick()
          img = sensor.snapshot()
         # for blob in img.find_blobs(thresholds, pixels_threshold=200, area_threshold=200):
         #     img.draw_rectangle(blob.rect())
          #    img.draw_cross(blob.cx(), blob.cy())
          #    print(blob.code())
          blobs = img.find_blobs([thresholds[0], thresholds[1], thresholds[2]], merge=True)
          i=0
          for blob in img.find_blobs(thresholds, pixels_threshold=200, area_threshold=200):
      
              if i!=0:
                  continue
              img.draw_cross(blob.cx(), blob.cy())
              img.draw_rectangle(blob.rect())
              print(blob[8])
              print(blob.cx(), blob.cy())
              list1[i]=blob[8]
              list1[i+1]=blob.cx()
              i=i+1
              print(list1)
              print(i)
      
      
      
      


    • 我不太懂你要做什么?

      什么叫做“并且返回一个数值”,什么的数值?

      看看这个?https://forum.singtown.com/topic/1735/如何识别三种颜色-而且能够分别记下坐标