为什么图像会泛红色

[叶晓一]

如图墙壁是白色，摄像头拍出来就泛红色了

[kidswong999]

你用的是什么代码？

请运行hello world

http://book.openmv.cc/example/01-Basics/helloworld.html

[叶晓一]

@kidswong999
运行hello world是正常的，我的代码如下

thresholds = [
              (30, 100, 15, 127, 15, 127), # generic_red_thresholds
              (30, 100, -64, -8, -32, 32), # generic_green_thresholds
              (0, 30, 0, 64, -128, 0)] # generic_blue_thresholds

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()
uart = UART(3, 115200)
# Only blobs that with more pixels than "pixel_threshold" and more area than "area_threshold" are
# returned by "find_blobs" below. Change "pixels_threshold" and "area_threshold" if you change the
# camera resolution. "merge=True" merges all overlapping blobs in the image.

while(True):
    clock.tick()
    img = sensor.snapshot()
    blobs = img.find_blobs([thresholds[threshold_index]], pixels_threshold=6000, area_threshold=7000, merge=True)
    if blobs:
        for blob in blobs:
            img.draw_rectangle(blob.rect())
            img.draw_cross(blob.cx(), blob.cy())
            #print(clock.fps())
        if blob.cx()>=150:
            output_str="%d" % (blob.cx())
            print('you send:',output_str)
            uart.write(output_str+'\r\n')
            pyb.delay(300)
            uart = UART(3, 115200, timeout_char=1000)
            pyb.delay(4000)
        pyb.delay(300)
    else:
        #output_str="0"
        #print('you send:',output_str)
        #uart.write(output_str+'\r\n')
        pyb.delay(300)

[yuan]

有没有接其他电路？OpenMV是如何供电的，供电接的哪个引脚？

[叶晓一]

@yuan 7号引脚用于输出高低电平，用USB接口或是Vin、gnd供电，每次用hello world的示例就会复原，但运行我的程序长了就会泛红，现在泛红越来越频繁了

[yuan]

vin gnd供电，是多少伏电压?