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gooed result or bad result for findHomography

Hi !

i read that for finding that the homography is good or bad thare are 2 solution:

1.Compute the determinant of the homography, and see if it's too close to zero for comfort. 2.Even better, compute its SVD, and verify that the ratio of the first-to-last singular value is sane (not too high). Either result will tell you whether the matrix is close to singular.

is true this? and there are a method for calculate the svd method in opencv?

thanks

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gooed good result or bad result for findHomography

Hi !

i I read that for finding that the homography is good or bad thare are 2 solution:

  1. 1.Compute Compute the determinant of the homography, and see if it's too close to zero for comfort. 2.Even comfort.

  2. Even better, compute its SVD, and verify that the ratio of the first-to-last singular value is sane (not too high). Either result will tell you whether the matrix is close to singular.

is true this? Is this true? and there are is a method for to calculate the svd method SVD in opencv?

thanks