How two fuse two sets of images?

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Gabriele Ciccone
Gabriele Ciccone on 11 Mar 2020
Commented: Guillaume on 12 Mar 2020
Hi all,
I have two folders with same number of same dimnesion images : one for the greyscale images and one for the RGB images. I'm looking for a way to use imfuse (or a function like that) to combine image 1 from one folder to image 1 from the second folder, then image 2 from one folder to image 2 from the second folder, image 3 to image 3 etc etc..
edit: I'm looking for an aoutomatic way to do this for all the 230 + 230 images.
I'm an archaeologist so not really expert with code, but I learn fast!!
Thnaks a lot for any help!
Gabriele Ciccone
Gabriele Ciccone on 11 Mar 2020
Yes! I need to match them in numerical order. Do you have some suggestions or maybe a code the suits for my needs?

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Accepted Answer

Guillaume on 11 Mar 2020
Step 1: Download Stephen's natsortfiles.
Then adapt as needed. I still don't know what you want as output. I assume new images in another folder
folder1 = 'C:\somewhere\somefolder';
folder2 = 'C:\somewhere\someotherfolder';
folderout = 'C:\anothersomewhere\something';
outfilepattern = 'FancyName%03d.tif'; %see the documentation of sprintf for format string syntax
filelist1 = dir(fullfile(folder1, '*.tif'));
filelist2 = dir(fullfile(folder2, '*.tif'));
assert(numel(filelist1) == numel(filelist2), 'Mismatch between file count in input folders.');
filelist1 = natsortfiles({});
filelist2 = natsortfiles({});
for fidx = 1:numel(filelist1)
img1 = imread(fullfile(folder1, filelist1{fidx}));
img2 = imread(fullfile(folder2, filelist2{fidx}));
img_fuse = imfuse(img1, img2, 'montage'); %works even if one image is greyscale and the other is rgb. Smaller images get padded to fit the size of the larger one.
imwrite(img_fuse, fullfile(folderout, sprintf(outfilepattern, fidx)));
Guillaume on 12 Mar 2020
If your problem is resolved, then please accept the answer that solved it.

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More Answers (1)

Ralf U.
Ralf U. on 11 Mar 2020
You can use the imfuse function to combine the images in the same plane. Have a look at the doc for more infos.
if you want to combine GRB and greyscale images, you might want to convert them both to RGB first:
rgbImage = cat(3, grayImage, grayImage, grayImage);
or if greyscale suffices:
rgbImage = ind2rgb(grayImage, colormap);
Guillaume on 11 Mar 2020
Note that imfuse will automatically convert a greyscale image to RGB if the other is RGB, no need to do this yourself.

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