为什么外界光线增强后图像变成灰色的?
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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())
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你代码写的就是GRAYSCALE