SVD

Finding Homography Matrix using Singular-value Decomposition and RANSAC in OpenCV and Matlab

Solving a Homography problem leads to solving a set of homogeneous linear equations such below: \begin{equation} \left( \begin{array}{ccccccccc} -x1 & -y1 & -1 & 0 & 0 & 0 & x1*xp1 & y1*xp1 & xp1\\ 0 & 0 & 0 & -x1 & -y1 & -1 & x1*yp1 & y1*yp1 &  yp1\\ -x2 & -y2 &

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Stitching image using SIFT and Homography

This Matlab tutorial I use SIFT, RANSAC, and homography to find corresponding points between two images. Here I have used vlfeat to find SIFT features. Full code is available at my GitHub repository Major steps are: 0.Adding vlfeat to your Matlab workspace:

  1.Detect key points and extract descriptors. In the image below you can see some SIFT key

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