RGB图像代码：

import sensor, image, time

sensor.reset()
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.RGB565)
sensor.skip_frames(time = 2000)
clock = time.clock()

# Use the Tools -> Machine Vision -> Threshold Edtor to pick better thresholds.
threshold_dark = (70, 100, -77, 76, 19, 74)
gray_threshold = (80, 255)


while(True):
    clock.tick()
    img = sensor.snapshot()
    img.binary([threshold_dark])
    # img.erode(100)
    # img.dilate(5)
    print(img)

灰度值图像代码

# Color Binary Filter Example
#
# This script shows off the binary image filter. You may pass binary any
# number of thresholds to segment the image by.

import sensor, image, time

sensor.reset()
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.GRAYSCALE)
sensor.skip_frames(time = 2000)
sensor.set_auto_whitebal(True)  # 开启自动白平衡
clock = time.clock()

# Use the Tools -> Machine Vision -> Threshold Edtor to pick better thresholds.
threshold_dark = (70, 100, -77, 76, 19, 74)
threshold_light = (86, 100, -26, 8, -3, 45)
gray_threshold = (80, 255)


while(True):
    clock.tick()
    img = sensor.snapshot()
    img.binary([gray_threshold])
    # img.erode(100)
    # img.dilate(5)
    print(img)

如图所示，当Image是灰度图的时候使用阈值二值化得到的图像只有一个图层，图像大小是正确的；但是当image为RGB的时候生成的图像就有两个图层，这导致RGB图像的二值化图像无法正常进行腐蚀和膨胀操作，求大神解答！