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need atleast 4 corresponding points to calculate homography

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Aitik Gupta 2020-09-29 01:04:01 +05:30
parent b88ad7f2d9
commit 94e0ac7d9f
1 changed files with 3 additions and 0 deletions
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3
modules/calib3d/src/fundam.cpp
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@ -374,6 +374,9 @@ cv::Mat cv::findHomography( InputArray _points1, InputArray _points2,
return Mat();
convertPointsFromHomogeneous(p, p);
}
// Need at least 4 point correspondences to calculate Homography
if( npoints < 4 )
CV_Error(Error::StsVecLengthErr , "The input arrays should have at least 4 corresponding point sets to calculate Homography");
p.reshape(2, npoints).convertTo(m, CV_32F);
}