How to save concatenated images in MATLAB?

You can save the image without using the “imagesc()” function as follows:

new_name3 = strcat(f_name_image, '\', kk, '_', num2str(ff), '_pair.webp');
pair = [orig_im  noisy_image]; %concatenating two 256x256 images 
imwrite(pair, new_name3); 

However, if you do need to use “imagesc()” function, then please do the following:

new_name3 = strcat(f_name_image, '\', kk, '_', num2str(ff), '_pair.webp');
pair = [orig_im  noisy_image]; %concatenating two 256x256 images 
scaled_image = imagesc(pair); 
imwrite(scaled_image.CData, new_name3); 

The “imagesc()” function returns an “image” object. You need to extract the matrix values from the image object when writing into a file. “CData” property of the “Image” object stands for “Color Data” which is the matrix values of the concatenated image.