Improvements of the inverse compositional algorithm for parametric motion estimation

Abstract

In this work, we propose several improvements of the inverse compositional algorithm for parametric registration. We propose an improved handling of boundary pixels, a different color handling and gradient estimation, and the possibility to skip scales in the multiscale coarse-to-fine scheme. In an experimental part, we analyze the influence of the modifications. The estimation accuracy is at least improved by a factor 1.3 while the computation time is at least reduced by a factor 2.2 for color images.The C++ source code, the code documentation, and the online demo are accessible at the web page of this article 1 . Compilation and usage instruction are included in the README.txt file of the archive.