put extra check to cv::findChessboardCorners (ticket #648)

15 years ago · 9130d5bae1
parent 7f3ae3a011
commit 9130d5bae1
1 changed files with 2 additions and 1 deletions
--- a/modules/calib3d/src/calibinit.cpp
+++ b/modules/calib3d/src/calibinit.cpp
@ -1904,7 +1904,8 @@ bool findChessboardCorners( const Mat& image, Size patternSize,
    CvMat _image = image;
    bool ok = cvFindChessboardCorners(&_image, patternSize,
        (CvPoint2D32f*)&corners[0], &count, flags ) > 0;
-    corners.resize(count);
+    if(count >= 0)
+        corners.resize(count);
    return ok;
 }