How to save imshowpair figure using imwrite?

How would I save the following as a binary image? I want to use imwrite, or be able to save it as a variable in the workspace so that I can use bwskel.

registered = imregister(Moving,Fixed,'Similarity',optimizer,metric);

figure

A = imshowpair(registered,Fixed);

Answer 1

[Guillaume]

No, no, no, don't use print or saveas, this is possibly going to rescale your image, change the the colour depth, etc.

A simpler and reliable way is to use imfuse instead of imshowpair. imshowpair is for displaying a pair, imfuse is for creating an image of the pair. In any other way, they work exactly the same and have the same options

registered = imregister(Moving,Fixed,'Similarity',optimizer,metric); 
fusedpair = imfused(registered, Fixed);
imwrite(fusedpair, 'somefile.png');

[Vinai Datta Thatiparthi]

Thanks @Guillaume, this is clearly a better approach.

[Kirsty Bennett]

Thank you so much!! Literally saved me today :D

[Md Shamim Hossain]

Is it possible to save three images using the same process?

Answer 2

[Vinai Datta Thatiparthi]

Hey Kirsty,

Since imshowpair returns class matlab.graphics.primitive.Image, imwrite cannot be used directly. Instead, you can use the functions -

• saveas

saveas(gcf, 'savedImage.jpeg', 'jpeg');

• print

print(gcf, '-djpeg', 'savedImage.jpeg', '-r0'); % Print allows you to specify the resolution 
% at which you want to save the image

Hope this helps!

[Kirsty Bennett]

Thank you Vinai. I'll use the saveas function :)