Hello, I have the MT9M114 sensor on the H7 R2. I’ve fixed auto_gain to false and turned off auto exposure. Exposure and gain read back correctly as fixed. But I’m still noticing when I look at a grayscale histogram that there appears to still quite a bit of gain adjustment happening, because the grayscale distribution gradually shifts for a second or two after a sudden change in brightness in the scene - well after the scene has stopped changing. And the statistics.mean() drifts for a while after the scene change is complete.
I read elsewhere in this forum that the MT9M114 is more of a SoC and is more complicated, with some methods are not implemented for it. Does it offer a fully manual control? Is there additional gain control happening in the sensor that OpenMV is not able to control?
I also ran the ‘sensor manual gain control.py’ example script as-is, to make sure I didn’t make an error, and it also clearly shows change in gain despite the script locking the gain.