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ipa: rkisp1: awb: Ignore empty AWB statistics

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When the AWB engine doesn't find a valid pixel because all pixels lie
outside the configured colour range it returns an AWB measurement value
of 255, 255, 255. This leaves the regulation in an unrecoverable state
noticeable by a completely green image. Fix that by skipping the AWB
calculation in case there were no valid pixels.

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>
This commit is contained in:
Stefan Klug 2025-04-29 13:59:19 +02:00
parent 848a3017b8
commit 0069b9ceb1
1 changed files with 5 additions and 0 deletions
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5
src/ipa/rkisp1/algorithms/awb.cpp
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@ -298,6 +298,11 @@ void Awb::process(IPAContext &context,
const rkisp1_cif_isp_stat *params = &stats->params;
const rkisp1_cif_isp_awb_stat *awb = &params->awb;
if (awb->awb_mean[0].cnt == 0) {
LOG(RkISP1Awb, Debug) << "AWB statistics are empty";
return;
}
RGB<double> rgbMeans = calculateRgbMeans(frameContext, awb);
/*