From 83f0ea3bee555ef0fbae8f305e177712b74337b4 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Thu, 2 Mar 2023 16:11:45 +0100 Subject: ipa: rkisp1: lsc: Fix integer division error The RkISP1 implementation of the LensShadinCorrection algorithm has been made adaptive to the scene color temperature in commit 14c869c00fdd ("ipa: rkisp1: Take into account color temperature during LSC algorithm"). The LSC algorithm interpolates the correction factors using the table's reference color temperatures. When calculating the interpolation coefficients, an unintended integer division makes both coefficient zeros resulting in a completely black image. Fix this by type casting to double one of the division operands. Fixes: 14c869c00fdd ("ipa: rkisp1: Take into account color temperature during LSC algorithm") Signed-off-by: Jacopo Mondi --- src/ipa/rkisp1/algorithms/lsc.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/ipa/rkisp1/algorithms/lsc.cpp b/src/ipa/rkisp1/algorithms/lsc.cpp index 3a443e77..a7ccedb1 100644 --- a/src/ipa/rkisp1/algorithms/lsc.cpp +++ b/src/ipa/rkisp1/algorithms/lsc.cpp @@ -216,8 +216,8 @@ void LensShadingCorrection::interpolateTable(rkisp1_cif_isp_lsc_config &config, const Components &set1, const uint32_t ct) { - double coeff0 = (set1.ct - ct) / (set1.ct - set0.ct); - double coeff1 = (ct - set0.ct) / (set1.ct - set0.ct); + double coeff0 = (set1.ct - ct) / static_cast(set1.ct - set0.ct); + double coeff1 = (ct - set0.ct) / static_cast(set1.ct - set0.ct); for (unsigned int i = 0; i < RKISP1_CIF_ISP_LSC_SAMPLES_MAX; ++i) { for (unsigned int j = 0; j < RKISP1_CIF_ISP_LSC_SAMPLES_MAX; ++j) { -- cgit v1.2.1