@ohu5 很简单，先使用阈值助手设置绿色和棕色的阈值，然后二值化，然后计算直方图就行了。
hist[0]和hist[1]就是颜色比例
import sensor, image, time
sensor.reset() # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240)
sensor.skip_frames(time = 2000) # Wait for settings take effect.
clock = time.clock() # Create a clock object to track the FPS.
green_threshold = (10,30,30,40,50,60)#随便写的，需要重新设置阈值
brown_threshold = (40,50,-30,20,-10,10)#随便写的，需要重新设置阈值
while(True):
clock.tick()
img = sensor.snapshot()
img.binary([green_threshold, brown_threshold], to_bitmap=True)
hist = img.get_histogram(bins=2).l_bins()
print(hist)
print(clock.fps())