Aidan Mala

IT professional

Computer Vision: Geometric Image Warping and DLT-Based Stitching

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The following task, stitch the two following images together. How hard could it be?

The approach that is going to be used in this post is to estimate a 3×3 homography matrix using the Direct Linear Transform (DLT) algorithm.

\left[ \begin{matrix} x^C w \\ y^C w \\ w \end{matrix} \right] = \left[ \begin{matrix} h_{11} & h_{12} & h_{13} \\ h_{21} & h_{22} & h_{23} \\ h_{31} & h_{32} & h_{33} \end{matrix} \right] \left[ \begin{matrix} x^R \\ y^R \\ 1 \end{matrix} \right]

We then detect the SIFT features

Using the resulting homography matrix, we can stitch the two images together