<div dir="ltr">Hi All,<div>I am trying to register two 3d images, both OCT's from different patients. Currently, I do the translation to roughly overlap the two volumes of interest, then do the affine transform in 3 levels, and finally do the BSpline transform based registration in just one level.</div>
<div><br></div><div>My Volume size is 200 x 200 x 600. I am using a machine with 64GB of memory and 8 core processor. </div><div><br></div><div>Am using Conjugate gradient line search optimizer for the Affine registration with MMIv4 metric, and using LBFGSBv4 optimizer for the BSpline registration, again using MMIv4 metric. The Bspline grid is 5 x 5 x 5.</div>
<div><br></div><div>It takes about 12 hours for the process to complete. Is this normal?</div><div><br></div><div>Also, in the previous MMIv3 version, I could set the number samples used to calculate the metric. I am not sure how to do that here or whether it even matters in the v4 framework. </div>
<div><br></div><div>I see that there is something like setusefixedsamplepointset function for the metric, which is currently set to false. Does it mean it is using all the voxels in the metric calculation? </div><div><br>
</div><div>I appreciate anyone helping me out here. </div><div><br></div><div>Best regards,</div><div>Vishwa</div></div>