Hi All, <br><br>I am quite new in ITK and I am trying to use the Multi-Resolution registration from ITK to register my images. <br><br>I am currently using CT images from femur bones of aproximately 250x250x500 with different resolutions of around
0.6x0.6x0.1 mm. <br><br>The Optimizer, i am using is the itkVersorRigid3DTransformOptimizer and the metric itkMeanSquaresImageToImageMetric. <br><br>I was firstly implementing the rigid registration with the code provided with the 3D registration, and it resulted pretty slow. Therefore, I wanted to try with the pyramidal registration to speed up the registration, but it is not giving a faster process, but slowing down. I don't get well the parameters SetMaximumStepLength and SetMinimumStepLength. How these parameters can reduce the number of iterations for each level and achieve a faster and optimal registration.
<br><br>Does anybody use that kind of registration before and can give me some hints abut it?<br><br>Regards,<br><br><br>