Reading on the ColorCamera node API documentation that the ISP does auto-focus, auto-exposure and auto-white-balance and seeing a scene mode like "face priority", I wonder what the camera does exactly when I do not explicitly set auto ROIs for focus and exposure?
Being mainly interested in good stills getting generated for photobooth applications, I am currently having NN based face tracking in the pipeline just to get a ROI for focus+exposure to be applied before the snapshot but wonder if this is actually overkill?
What are the default ROIs/focusing/exposing rules when nothing particular is specified?
Are there any guarantees that possibly pending auto features have been completed at the time a still trigger request is executed?
When can we expect depthai-core to report the status of auto features and ideally focus success/failure?
Thank you!
ISP 3A algorithm behaviour clarification
Hi matthias ,
Regarding first question - 3A is by default done on the whole frame. So ROI would be (0,0,1,1), and your approach seems correct to me for your use-case. There's no guarantee as focus process isn't instant, maybe after focus value doesn't move too much for eg. 10 frames in a row I would send still event, as in that time the lens would have moved to correct position. Thoughts?
Thanks, Erik
2 months later
matthias It's currently in PR, so you could use that branch to obtain focus/iso/exposure time.
Thanks, Erik