I am trying to better understand how the different exposure modes work with HQ camera (imx477) on Pi5. From the docs and posts here, I compiled the following understanding, and it would be great if you corrected any mistakes:
1) In camera DOL-HDR is not supported by the Pi stack (and no plans to?)
2) The only software HDR mode suitable for video is SingleExposure (other modes will cause motion blur)
3) I believe this SingleExposure mode works by using the whole dynamic range of 12-bit raw to produce details in both shadows and highlights, but could not find any definite info. Is it so, or does it do something more involved?
4) I'm a bit baffled by the description of SingleExposure as "mode that accumulates multiple short exposure images" (in the camera docs). Here "accumulates" seem to imply that several shots are combined, but it would not be "single" then (and does not look possible, given that I can run it with --framerate 30 and --exposure 30ms).
5) This is more general question - I see the target luminance defined as (I believe) pieceswise function, rather than a single value, e.g. "y_target": [ 0, 0.17, 1000, 0.17 ] but could not find explanation of how it is used.
1) In camera DOL-HDR is not supported by the Pi stack (and no plans to?)
2) The only software HDR mode suitable for video is SingleExposure (other modes will cause motion blur)
3) I believe this SingleExposure mode works by using the whole dynamic range of 12-bit raw to produce details in both shadows and highlights, but could not find any definite info. Is it so, or does it do something more involved?
4) I'm a bit baffled by the description of SingleExposure as "mode that accumulates multiple short exposure images" (in the camera docs). Here "accumulates" seem to imply that several shots are combined, but it would not be "single" then (and does not look possible, given that I can run it with --framerate 30 and --exposure 30ms).
5) This is more general question - I see the target luminance defined as (I believe) pieceswise function, rather than a single value, e.g. "y_target": [ 0, 0.17, 1000, 0.17 ] but could not find explanation of how it is used.
Statistics: Posted by f137 — Wed Dec 25, 2024 12:55 pm — Replies 0 — Views 10