gains             104 modules/stitching/include/opencv2/stitching/detail/exposure_compensate.hpp     std::vector<double> gains() const;
gains             201 modules/stitching/src/exposure_compensate.cpp     std::vector<double> gains = compensator.gains();
gains             217 modules/stitching/src/exposure_compensate.cpp                     gain_map(by, bx) = static_cast<float>(gains[bl_idx]);