threshold          78 modules/cudaarithm/src/element_operations.cpp double cv::cuda::threshold(InputArray, OutputArray, double, double, int, Stream&) {throw_no_cuda(); return 0.0;}
threshold          54 modules/imgproc/src/opencl/threshold.cl __kernel void threshold(__global const uchar * srcptr, int src_step, int src_offset,
threshold        1186 modules/imgproc/src/thresh.cpp double cv::threshold( InputArray _src, OutputArray _dst, double thresh, double maxval, int type )