From 59687683a16c64c6821db89c7a1be35b161bf917 Mon Sep 17 00:00:00 2001 From: Jean-Michel Hautbois Date: Thu, 30 Sep 2021 11:05:16 +0200 Subject: ipa: ipu3: awb: Set a threshold for the green saturation We can have a saturation ratio per cell, giving the percentage of pixels over a threshold within a cell where 100% is set to 0xff. The parameter structure 'ipu3_uapi_awb_config_s' contains four fields to set the threshold, one per channel. The blue field is also used to configure the ImgU and make it calculate the saturation ratio or not. Set a green value saturated when it is more than 230 (90% of the maximum value 255, coded as 8191). As this is the only channel used for AGC, there is no need to apply it to the other ones. Signed-off-by: Jean-Michel Hautbois Reviewed-by: Laurent Pinchart Reviewed-by: Kieran Bingham --- src/ipa/ipu3/algorithms/awb.h | 1 + 1 file changed, 1 insertion(+) (limited to 'src/ipa/ipu3/algorithms/awb.h') diff --git a/src/ipa/ipu3/algorithms/awb.h b/src/ipa/ipu3/algorithms/awb.h index 3b81f600..0c81e39e 100644 --- a/src/ipa/ipu3/algorithms/awb.h +++ b/src/ipa/ipu3/algorithms/awb.h @@ -70,6 +70,7 @@ private: void clearAwbStats(); void awbGreyWorld(); uint32_t estimateCCT(double red, double green, double blue); + static constexpr uint16_t threshold(float value); std::vector zones_; Accumulator awbStats_[kAwbStatsSizeX * kAwbStatsSizeY]; -- cgit v1.2.1