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

9130d5ba · Vadim Pisarevsky · 7f3ae3a0 · 9130d5ba
Commit 9130d5ba authored Nov 09, 2010 by Vadim Pisarevsky
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calibinit.cpp modules/calib3d/src/calibinit.cpp +2 -1

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--- 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;
 }