cvSum            1841 apps/traincascade/old_ml_inner_functions.cpp     CV_ASSERT((int)cvSum(counts).val[0] == nsamples);
cvSum            1434 modules/core/include/opencv2/core/core_c.h CVAPI(CvScalar)  cvSum( const CvArr* arr );
cvSum            2734 modules/imgproc/src/histogram.cpp         sum = cvSum( &mat ).val[0];