diff options
| author | David Plowman <david.plowman@raspberrypi.com> | 2023-11-22 09:13:02 +0000 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-11-22 18:33:17 +0200 |
| commit | 2fae9603e6cc483d9d0d74868721b272776513cf (patch) | |
| tree | 8f35228d6498e5c7e6feb380d3cfe134deaa5cf6 /src/ipa | |
| parent | fd84180d7a09eb9f4891f740735b28af68c201af (diff) | |
ipa: rpi: alsc: Do not allow zero colour ratio statistics
The algorithm computes R/G and B/G colour ratio statistics which we
should not allow to go to zero because there is clearly no gain you
could apply to R or B to equalise them. Instead flag such regions as
having "insufficient data" in the normal manner.
Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/ipa')
| -rw-r--r-- | src/ipa/rpi/controller/rpi/alsc.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/ipa/rpi/controller/rpi/alsc.cpp b/src/ipa/rpi/controller/rpi/alsc.cpp index b7413611..8a205c60 100644 --- a/src/ipa/rpi/controller/rpi/alsc.cpp +++ b/src/ipa/rpi/controller/rpi/alsc.cpp @@ -548,7 +548,9 @@ static void calculateCrCb(const RgbyRegions &awbRegion, Array2D<double> &cr, for (unsigned int i = 0; i < cr.size(); i++) { auto s = awbRegion.get(i); - if (s.counted <= minCount || s.val.gSum / s.counted <= minG) { + /* Do not return unreliable, or zero, colour ratio statistics. */ + if (s.counted <= minCount || s.val.gSum / s.counted <= minG || + s.val.rSum / s.counted <= minG || s.val.bSum / s.counted <= minG) { cr[i] = cb[i] = InsufficientData; continue; } |