@kidswong999 是的，相同参数下，拍摄到的图像差别很大，亮度不同

import sensor, image, time,pyb
from pyb import Pin
sensor.reset()                      # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.SVGA)   # Set frame size to QVGA (320x240)
sensor.set_auto_exposure(True)
#sensor.set_auto_gain(False,gain_db=128)
sensor.skip_frames(time = 2000)     # Wait for settings take effect.
p_out = Pin('P7', Pin.OUT_PP)#设置p_out为输出引脚
count = 0
while(True):
    p_out.high()#设置p_out引脚为高    
    time_start=pyb.millis()
    img = sensor.snapshot()         # Take a picture and return the image.
    duration=pyb.elapsed_millis(time_start)
    p_out.low()#设置p_out引脚为低
    print(sensor.get_exposure_us())
    print(duration)
    print(sensor.get_gain_db())
    time.sleep(1)
    count = count + 1
    img.save("test"+str(count)+".jpg")
    print(count)
    if(count == 10):
        break

相机参数：
109740（曝光时间）
20
23.8066 （增益）
1
109740
27
23.8066
2
109740
27
23.8066
3
109740
27
23.8066
4
109740
26
23.8066
5
109740
26
23.8066
6
109740
27
23.8066
7
109740
26
23.8066
8
109740
27
23.8066
9
109740
27
23.8066
10