Most of the B-spline deformations in an image registration procedure I have read about typically use uniform B-splines. I have seen that development on non-uniform B-splines is in progress in ITK. But what benefits are earned from non-uniform B-splines in image registration? <br>
<br>I have read an article on non-uniform spacing of the control points in relation to image registration:<br><br><a href="http://www.springerlink.com/content/0q3bfeunq4avrwdf/">http://www.springerlink.com/content/0q3bfeunq4avrwdf/</a><br>
<br>But to define a non-uniform spacing of the control points one does not necessarily need to use non-uniform knot-vectors.<br><br>The purpose of non-uniform knot-vectors as I understand is to have different weights for each control point, but to my knowledege no results with this approach has been published.<br>