Hi,
I ported OV7251 to Rubik Pi 3. The sensor is detected and streaming works, so basic bring-up seems OK.
My main issue is image quality, especially grain/noise behavior.
What I observe is:
- when gain is 1, the image is dark but grain is relatively low
- as soon as gain is increased to 2, grain increases a lot
- so the main problem is not just that the image is dark, but that noise rises very aggressively with gain
- streaming itself works, but image quality becomes poor once gain is raised
This makes me think the remaining issue is related to sensor gain behavior and/or tuning, rather than basic sensor bring-up.
I would like to understand:
- Is it normal for OV7251 to become this grainy already at gain 2?
- Is this more likely a tuning/chromatix issue, or sensor-side configuration issue?
- Is there any known good tuning approach for OV7251 on this platform?
Thanks.
