diff options
| author | Stefan Klug <stefan.klug@ideasonboard.com> | 2025-04-03 17:49:21 +0200 |
|---|---|---|
| committer | Stefan Klug <stefan.klug@ideasonboard.com> | 2025-05-20 11:20:08 +0200 |
| commit | 969df3db3195b43883b6a200bd022ee6c9928042 (patch) | |
| tree | 0be9fe3883f2723419cfe24882409f11612a81a9 | |
| parent | 7991293cec286b5e87d7be39d7119d422989ea51 (diff) | |
ipa: rkisp1: awb: Avoid division by zero
As the gains can also be specified manually, the regulation can run into
numeric instabilities by dividing by near zero. Mitigate that by
applying a small minium value.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
| -rw-r--r-- | src/ipa/rkisp1/algorithms/awb.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/ipa/rkisp1/algorithms/awb.cpp b/src/ipa/rkisp1/algorithms/awb.cpp index bd8430ad..399fb51b 100644 --- a/src/ipa/rkisp1/algorithms/awb.cpp +++ b/src/ipa/rkisp1/algorithms/awb.cpp @@ -413,9 +413,9 @@ RGB<double> Awb::calculateRgbMeans(const IPAFrameContext &frameContext, const rk /* * The ISP computes the AWB means after applying the colour gains, * divide by the gains that were used to get the raw means from the - * sensor. + * sensor. Apply a minimum value to avoid divisions by near-zero. */ - rgbMeans /= frameContext.awb.gains; + rgbMeans /= frameContext.awb.gains.max(0.01); return rgbMeans; } |