[PATCH v3 0/5] Software ISP levels cleanup
Kieran Bingham
kieran.bingham at ideasonboard.com
Fri May 24 23:59:17 CEST 2024
Quoting Milan Zamazal (2024-05-23 12:26:51)
> This is a cleanup of black level and color gain handling in software
> ISP. It fixes omission of black level subtraction in white balance
> computation and moves color lookup tables computations out of
> debayering. The latter also serves as a preparation for bringing
> software ISP algorithms closer to common libcamera algorithm handling,
> in future patches.
Testing this series on Lenovo X13s has some oddity at startup.
Videos with before and after can be found at - https://photos.app.goo.gl/jWvqK5nNBBpdNqNK8
Milan, have you seen such corruption/overflow in your testing?
--
Kieran
>
> Changes in v3:
> - Casting an uint8_t value to unsigned int when logging it.
>
> Changes in v2:
> - stdint.h include moved from black_level.cpp to black_level.h.
> - Removed meaningless multiplication in black level subtraction.
> - Removed local variable scoping block.
> - Added a comment about subtracting black level for auto white balance.
> - A code snippet related to black level subtraction moved to the right
> patch.
> - Dropped the patch moving TODO #13 to a source code comment.
> - Added a patch to use float rather than uint8_t gains in color lookup
> tables passed to debayering.
>
> Milan Zamazal (5):
> libcamera: software_isp: Use a specific integer type for black level
> libcamera: software_isp: Honor black level in AWB
> libcamera: software_isp: Move color mappings out of debayering
> libcamera: software_isp: Remove DebayerParams::kGain10
> libcamera: software_isp: Pass color lookup tables as floats
>
> .../internal/software_isp/debayer_params.h | 19 +++--
> src/ipa/simple/black_level.cpp | 2 +-
> src/ipa/simple/black_level.h | 5 +-
> src/ipa/simple/soft_simple.cpp | 76 ++++++++++++++-----
> src/libcamera/software_isp/TODO | 13 ----
> src/libcamera/software_isp/debayer.cpp | 28 +++----
> src/libcamera/software_isp/debayer_cpu.cpp | 53 +++++--------
> src/libcamera/software_isp/debayer_cpu.h | 13 ++--
> src/libcamera/software_isp/software_isp.cpp | 4 +-
> 9 files changed, 109 insertions(+), 104 deletions(-)
>
> --
> 2.42.0
>
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