Registation of two images in '.mat' format

Good day all,

Could someone please help me on how to register two images in '.mat format. Each .mat variable is 36x129 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

[Matt J]

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.

[AUWAL ABUBAKAR]

Thanks for your help. It works fine.

Yes the images look very similar. I would like to get and if possible plot/display the difference. Pls do you have idea how i can do that?

Thanks once again

[Matt J]

Why not as you were doing it previously?

[AUWAL ABUBAKAR]

I mean the difference between the two images. The difference is what I regarded as the position error and I need to display. What I do currently is to subtract img1 from img2 and display the difference.

[Matt J]

Because you have done an affine registration, the position error is different for every point, but you can obtain the estimated tform relating the images using imregtform

tform = imregtform(img1, img2, 'affine', optimizer, metric);

[AUWAL ABUBAKAR]

Thanks alot. Really help, I appreciate.