notNull           400 modules/imgproc/src/generalized_hough.cpp                 if (edgesRow[x] && (notNull(dyRow[x]) || notNull(dxRow[x])))
notNull           443 modules/imgproc/src/generalized_hough.cpp                 if (edgesRow[x] && (notNull(dyRow[x]) || notNull(dxRow[x])))
notNull           748 modules/imgproc/src/generalized_hough.cpp                 if (edgesRow[x] && (notNull(dyRow[x]) || notNull(dxRow[x])))