帧间差分法实现运动物体检测，在彩色图转换灰度图出现错误

[l3wz]

# Untitled - By: Administrator - 周四 5月 11 2023

import sensor, image, time

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

clock = time.clock()

lastfram=None


while(True):
    clock.tick()




    img = sensor.snapshot()

    img = image.rgb_to_grayscale(img)

    img=img.binary(50)

    if lastfram is None:
      lastfram = img.copy()
      continue

    diff=image.difference(lastfram,img)

    blobs=diff.find_blobs()

    count=len(blobs)

    lastfram=img.copy()

    print(clock.fps())

求问整个程序有什么错误

[kidswong999]

img = image.rgb_to_grayscale(img)

改为

img.to_grayscale()