As i use a small part of the image, i try to control the exposure and gain to have the highest contrast with different ambiant lights.
Is there a possibility to have the automatic gain and exposure control on a small part of the image ?
sensor.set_windowing((128,128)) only cut the image (white part is still white).
The gain is a float, and what is the minimum and maximum value (0.00001 to 9999.99999) ?
What about the exposure too (1 to 1960µs as said in OV7725 datasheet) ?
Thanks for help,