openmv4 h7 plus 可以用pyb模块吗？但是为什么led灯不亮？

from image import SEARCH_DS

Reset sensor

sensor.reset()

Set sensor settings

sensor.set_contrast(1)
sensor.set_gainceiling(16)

Max resolution for template matching with SEARCH_EX is QQVGA

sensor.set_framesize(sensor.QQVGA)

You can set windowing to reduce the search image.

sensor.set_windowing(((640-80)//2, (480-60)//2, 80, 60))

sensor.set_pixformat(sensor.GRAYSCALE)

Load template.

Template should be a small (eg. 32x32 pixels) grayscale image.

template = image.Image("/3")

clock = time.clock()

Run template matching

while True:
clock.tick()
img = sensor.snapshot()

# find_template(template, threshold, [roi, step, search])
# ROI: The region of interest tuple (x, y, w, h).
# Step: The loop step used (y+=step, x+=step) use a bigger step to make it faster.
# Search is either image.SEARCH_EX for exhaustive search or image.SEARCH_DS for diamond search
#
# Note1: ROI has to be smaller than the image and bigger than the template.
# Note2: In diamond search, step and ROI are both ignored.
r = img.find_template(
    template, 0.70, step=4, search=SEARCH_EX
)  # , roi=(10, 0, 60, 60))
if r:
    img.draw_rectangle(r)

print(clock.fps())

已经进行过保存完模板重新上电的操作了，但还是无法运行，请求指导