diff options
| author | Stefan Klug <stefan.klug@ideasonboard.com> | 2024-07-12 16:32:02 +0200 |
|---|---|---|
| committer | Kieran Bingham <kieran.bingham@ideasonboard.com> | 2024-07-24 15:34:14 +0100 |
| commit | 7b8094d6fc9798ea2944e6a01220e23e717c2bc4 (patch) | |
| tree | 55e55ebab69b24176b858f70439cfcc95da40a89 /src/ipa/rkisp1/algorithms/awb.cpp | |
| parent | 7ee9ef451dfe6c07747b206a390455d4e8df1638 (diff) | |
ipa: rkisp1: awb: Clamp gains to machine limits
When the color gains are set manually it is possible to specify a
gain that wrapped the hardware limits. It would also be possible to
further tune the floating point limits, but that is an error prone
approach. So the limits are imposed on the integers, just before writing
to the hardware. This noticeably reduces some oscillations in the awb
regulation.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/ipa/rkisp1/algorithms/awb.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/awb.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/ipa/rkisp1/algorithms/awb.cpp b/src/ipa/rkisp1/algorithms/awb.cpp index a01fe5d9..1a5d4776 100644 --- a/src/ipa/rkisp1/algorithms/awb.cpp +++ b/src/ipa/rkisp1/algorithms/awb.cpp @@ -120,10 +120,14 @@ void Awb::prepare(IPAContext &context, const uint32_t frame, frameContext.awb.gains.blue = context.activeState.awb.gains.automatic.blue; } - params->others.awb_gain_config.gain_green_b = 256 * frameContext.awb.gains.green; - params->others.awb_gain_config.gain_blue = 256 * frameContext.awb.gains.blue; - params->others.awb_gain_config.gain_red = 256 * frameContext.awb.gains.red; - params->others.awb_gain_config.gain_green_r = 256 * frameContext.awb.gains.green; + params->others.awb_gain_config.gain_green_b = + std::clamp<int>(256 * frameContext.awb.gains.green, 0, 0x3ff); + params->others.awb_gain_config.gain_blue = + std::clamp<int>(256 * frameContext.awb.gains.blue, 0, 0x3ff); + params->others.awb_gain_config.gain_red = + std::clamp<int>(256 * frameContext.awb.gains.red, 0, 0x3ff); + params->others.awb_gain_config.gain_green_r = + std::clamp<int>(256 * frameContext.awb.gains.green, 0, 0x3ff); /* Update the gains. */ params->module_cfg_update |= RKISP1_CIF_ISP_MODULE_AWB_GAIN; |