absdiff          2314 modules/core/src/arithm.cpp void cv::absdiff( InputArray src1, InputArray src2, OutputArray dst )
absdiff            54 modules/cudaarithm/src/element_operations.cpp void cv::cuda::absdiff(InputArray, InputArray, OutputArray, Stream&) { throw_no_cuda(); }
absdiff           280 modules/cudaarithm/src/element_operations.cpp void cv::cuda::absdiff(InputArray src1, InputArray src2, OutputArray dst, Stream& stream)