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  • 为什么外界光线增强后图像变成灰色的?



    • 0_1695713995228_d3e08c70-7e5c-44c7-a3ab-3c8d3af991b0-image.png
      为什么外界光线增强后图像变成灰色的?

      # Single Color Grayscale Blob Tracking Example
      #
      # This example shows off single color grayscale tracking using the OpenMV Cam.
      
      import sensor, image, time, math
      
      # Color Tracking Thresholds (Grayscale Min, Grayscale Max)
      # The below grayscale threshold is set to only find extremely bright white areas.
      thresholds = (245, 255)
      
      sensor.reset()
      sensor.set_pixformat(sensor.GRAYSCALE)
      sensor.set_framesize(sensor.VGA)
      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()
      
      # 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], pixels_threshold=100, area_threshold=100, 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=0)
                  img.draw_line(blob.major_axis_line(), color=0)
                  img.draw_line(blob.minor_axis_line(), color=0)
              # These values are stable all the time.
              img.draw_rectangle(blob.rect(), color=127)
              img.draw_cross(blob.cx(), blob.cy(), color=127)
              # Note - the blob rotation is unique to 0-180 only.
              img.draw_keypoints([(blob.cx(), blob.cy(), int(math.degrees(blob.rotation())))], size=40, color=127)
          print(clock.fps())
      
      


    • 你代码写的就是GRAYSCALE