# Fast Image Registration

### From LRDE

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## Abstract

Image registration is a process widely used in image processing. Considering two measurements ${\displaystyle A}$ and ${\displaystyle B}$ of the same object (say, a radiography and an magnetic resonance image (MRI)), this technique estimates a transformation of ${\displaystyle A}$ so that the object in ${\displaystyle A}$ becomes aligned with the object in ${\displaystyle B}$. Basically this technique is able to superimpose the image ${\displaystyle A}$ over the image ${\displaystyle B}$, allowing the client to see mixed information. This presentation will discuss the implementation of a fast image registration algorithm in Milena, the Cxx generic image processing library from the Olena platform, developed at LRDE. Specific techniques used to improve this process will be introduced.