This week I was scheduled to be working on the VTK implementation of the graphical user interface but instead finished and polished (or are nearly done polishing with a lot of Eric's help) the affine registration and symmetric diffeomorphic registration steps to be done efficiently and reuse existing morphing code. This lays the groundwork for later developments, such as weeks 5 and 6 when the contact identification algorithms will be improved because we used a 3D image to do the SDR morph and had to label all the voxels that the contacts occupied from their centroid location. This is an essential step in the automating of contact identification and will be important as I both port over the GUI and add an automated identification algorithm.