# Revision history [back]

### Does findHomography uses DLT with SVD when there are more than 4 points?

Inforamtion take from here:

http://mmlab.disi.unitn.it/wiki/index.php/2D_Homography:_Algorithm_and_Tool

Basically it says when there are more than 4 points the set of equations Ah = 0 is over-determined and we need to

• minimizing residuals with Least Square

or

• adopt the so called singular value decomosition

OpenCV with findHomography which strategy adopts when there are more than 4 points?

### Does findHomography uses DLT with SVD when there are more than 4 points?

Inforamtion take Information taken from here:

http://mmlab.disi.unitn.it/wiki/index.php/2D_Homography:_Algorithm_and_Tool

Basically it says when there are more than 4 points the set of equations Ah = 0 is over-determined and we need to

• minimizing residuals with Least Square

or

• adopt the so called singular value decomosition

OpenCV with findHomography which strategy adopts when there are more than 4 points?

### Does findHomography uses DLT with SVD when there are more than 4 points?

Information taken from here:

Basically it says when there are more than 4 points the set of equations Ah = 0 is over-determined and we need to

• minimizing residuals with Least Square

or

• adopt the so called singular value decomosition

OpenCV with findHomography which strategy adopts when there are more than 4 points?

### Does findHomography uses DLT with SVD when there are more than 4 points?

Information taken from here:

Basically it says when there are more than 4 points the set of equations Ah = 0 is over-determined and we need to

• minimizing residuals with Least Square

or

• adopt the so called singular value decomosition

OpenCV with findHomography which strategy adopts when there are more than 4 points?points?

Ps. I know RANSAC is used to choose inliner/outlier, but what happens when inliner are more than 4 points (the system is over-determinated with more than 4 points)?

### Does findHomography uses DLT with SVD when there are more than 4 points?

Information taken from here:

Basically it says when there are more than 4 points the set of equations Ah = 0 is over-determined and we need to

• minimizing residuals with Least Square

or

• adopt the so called singular value decomosition

OpenCV with findHomography which strategy adopts when there are more than 4 points?

Ps. I know RANSAC is used to choose inliner/outlier, but what happens when inliner are more than 4 points (the points? the system is over-determinated with more than 4 points)?points

### Does findHomography uses use DLT with SVD when there are more than 4 points?

Information taken from here: