请教OV7670怎么判断当前坏境的光线较暗

runlywell

我在做一个安防项目，我想得到当前坏境的亮度，以便打开night mode 插入dummy pixel 调节亮度，但是正常的光线下我又不想打开它，因为打开的话frame rate 会降低。谢谢了

runlywell

怎么没有人回呀？

runlywell

请问怎么保证low lux 图像质量， 而又保持较高的frame rate

ovt_parson

1.Read Reg[0x00](Gain) to judge switch between normal and night mode.
2. suppose you use sensor AGC/AEC.
3.suppose normal mode: 15fps gain ceiling 8X, night mode: 3.75fps gain ceiling 8x
4. set proper thredhold value.
    in normal mode: if Gain>7X switch to night mode.
    in night mode: if gain<1.2X switch back to normal mode.

runlywell

非常感谢ovt_parson的帮助，谢谢了