SUBPIX_SHIFT      109 modules/imgproc/src/samplers.cpp     int operator()(float a) const { return cvRound(a*(1 << SUBPIX_SHIFT)); }
SUBPIX_SHIFT      114 modules/imgproc/src/samplers.cpp     uchar operator()(int a) const { return (uchar)((a + (1 << (SUBPIX_SHIFT-1))) >> SUBPIX_SHIFT); }