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Brett

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University Bern

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25 Mar 2009 B-spline Grid, Image and Point based Registration B-spline registration of two 2D / 3D images or corrsp. points, affine and with smooth b-spline grid. Author: Dirk-Jan Kroon

This does not work for arbitrary sized images. I haven't tried above 256x256 yet, but it won't work for smaller ROIs, I get the following error:
??? Attempted to access O_uniform(3,18,1); index out of bounds because size(O_uniform)=[17,17,2].

Error in ==> bspline_registration_gradient at 164
regBx=O_uniform(irp,jrp,1); regBy=O_uniform(irp,jrp,2);

Error in ==>
register_images>@(x)bspline_registration_gradient(x,sizes,Spacing/resize_per,imresize(ISmoving,1/resize_per),imresize(ISstatic,1/resize_per),options,MASKmovingsmall,MASKstaticsmall)
at 300
O_trans = resize_per*
fminlbfgs(@(x)bspline_registration_gradient(x,sizes,Spacing/resize_per,imresize(ISmoving,1/resize_per),imresize(ISstatic,1/resize_per),options,MASKmovingsmall,MASKstatic
Error in ==> fminlbfgs>gradient_function at 729
[fval, grad]=feval(funfcn,reshape(x,data.xsizes));

Error in ==> fminlbfgs at 154
[data,fval,grad]=gradient_function(data.xInitial,funfcn, data, optim);

Error in ==> register_images at 300
O_trans = resize_per*
fminlbfgs(@(x)bspline_registration_gradient(x,sizes,Spacing/resize_per,imresize(ISmoving,1/resize_per),imresize(ISstatic,1/resize_per),options,MASKmovingsmall,MASKstatic
Error in ==> example at 9
[Ireg,O_trans,Spacing,Bx,By,Fx,Fy] = register_images(Imoving,Istatic);

23 Mar 2009 Digital Image Correlation and Tracking Calculate displacement and strain from a series of images Author: Christoph Eberl

I was wondering what interpolation technique (if any) is used for points with a small SNR.

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