4. 代码正确，运行不报错，但是为什么openmv一直亮白灯
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    • 代码正确，运行不报错，但是为什么openmv一直亮白灯

    • H
       

      # Blob Detection Example
#
# This example shows off how to use the find_blobs function to find color
# blobs in the image. This example in particular looks for dark green objects.

import sensor, image, time, pyb

# You may need to tweak the above settings for tracking green things...
# Select an area in the Framebuffer to copy the color settings.

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False) # turn this off.
clock = time.clock() # Tracks FPS.

# For color tracking to work really well you should ideally be in a very, very,
# very, controlled enviroment where the lighting is constant...
green_threshold   = (75, 96, -43, -0, -1, 55)
size_threshold = 2000
blue_led = pyb.LED(3)
green_led = pyb.LED(2)
red_led = pyb.LED(1)

def find_max(blobs):
    max_size=0
    for blob in blobs:
        if blob[2]*blob[3] > max_size:
            max_blob=blob
            max_size = blob[2]*blob[3]
    return max_blob
def find_max1(blobs):
        max_size=0
        for blob in blobs:
            if blob[2]*blob[3] > max_size:
                max_blob=blob
                max_size = blob[2]*blob[3]
                max_blob1=blob[4]
        return max_blob1返回像素点大小


while(True):
    clock.tick() # Track elapsed milliseconds between snapshots().
    img = sensor.snapshot() # Take a picture and return the image.
    blobs = img.find_blobs([green_threshold])
    if blobs:
        max_blob = find_max(blobs)
        max_blob1=find_max1(blobs)
        xiangshu = max_blob1
        img.draw_rectangle(max_blob[0:4]) # rect
        img.draw_cross(max_blob[5], max_blob[6]) # cx, cy
        if xiangshu > size_threshold:
                    red_led.on()
        else:
                    blue_led.on()                   
        
    else:
        green_led.on()
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    • H

      而且我感觉openmv循环里的判断语句不能一直持续判断，感觉就像只判断一次就没了

      0

    • 因为你打开了灯就没控制关闭过。所以灯全是亮的。

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