怎么用代码控制openmv图像自动调亮

[h65e]

@kidswong999 不是，问题我都发在上边了，我都怀疑你有没有好好看一下，这跟摄像头模组固件版本有关系吗？这还一天一回复，这个效率等我把这个弄好了恐怕一个星期起步了吧，真是着急

[h65e]

@kidswong999 东西刚送走，现在我手头暂时也没openmv了，具体代码跟后面也没关系，前面的sensor设置就是rgb color tracking那个，我把skip frame删了，然后因为是摄像头是倒着放的，加了个水平垂直翻转，其他的都一样

[h65e]

@kidswong999 就是正常的openmv4h7cam
ov7725

[h65e]

就这么个代码，拿手遮一下镜头图像就亮了

# Single Color RGB565 Blob Tracking Example
#
# This example shows off single color RGB565 tracking using the OpenMV Cam.

import sensor, image, time, math

threshold_index = 0 # 0 for red, 1 for green, 2 for blue

# Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max)
# The below thresholds track in general red/green/blue things. You may wish to tune them...
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()

# 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()
   
    print(clock.fps())

[kidswong999]

你的代码就是开机2000ms自动调亮度和白平衡，然后关闭白平衡。

所以你的亮度是根据开机2000ms来校准的。

[kidswong999]

https://docs.singtown.com/micropython/zh/latest/openmvcam/library/omv.sensor.html#sensor.sensor.set_auto_exposure

使用set_auto_exposure可以控制曝光时间，就是调亮度。

[h65e]

@kidswong999 但是他后边怎么还会变呢

[kidswong999]

你没有把自动曝光关掉。

解决办法：在21行加入sensor.set_auto_exposure(False)

[h65e]

它开机校准之后后面亮度应该是不变的啊，但是我这里在校准之后再拍到比较暗的区域的时候，图像还是会突然变亮的啊

[h65e]

@kidswong999 好的我试一下

[h65e]

@kidswong999 确实如此，感激不尽