MATLAB: Registation of two images in ‘.mat’ format

Question

Good day all,

Could someone please help me on how to register two images in '.mat format. Each .mat variable is 36×129 with each element representing a distance value. When plotted using 'surf plot' it gives a chest surface images.

I would like to register the two surafces and obtain the difference in the surafce positions. Below is the code i used so far but returns a warning.. ' Registration failed because optimization diverged'

[optimizer, metric] = imregconfig('multimodal');
img_reg = imregister(img1, img2, 'affine', optimizer, metric);
imshowpair(img2, img_reg,'falsecolor');

Attached are the variables and the suraface image obtained when surf plot is used

Thanks

Answer 1

With monomodal registration, it works fine for me,

[optimizer, metric] = imregconfig('monomodal');

but I should mention that the two images look almost identical to begin with.