cvCheckContourConvexity 1710 modules/calib3d/src/calibinit.cpp             if( dst_contour->total == 4 && cvCheckContourConvexity(dst_contour) )
cvCheckContourConvexity  578 modules/imgproc/include/opencv2/imgproc/imgproc_c.h CVAPI(int)  cvCheckContourConvexity( const CvArr* contour );