How two fuse two sets of images?

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!

[Guillaume]

It would be useful to have more details about the structure of the two folders. How do you know what is image 1, 2, ... in each folder?

It's also not clear what you want as an output. A bunch of image matrices in matlab or images of some unspecified type in a new folder?

[Gabriele Ciccone]

ok, thank you:

So, the first folder has: 230 images I made from thermocamer photos with this codein Image Batch Processor:

function results = myimfcn(im)
imgray = rgb2gray(im);
results = imresize(imgray, 6);

and then saved in a new folder from Image Batch Processor

the second one: 230 RGB images just cropped to have the same size of the thermo ones

function results = myimfcn(im)
targetSize = [2880 3840];
r = centerCropWindow2d(size(im),targetSize);
results = imcrop(im,r);

and then saved in a new folder from Image Batch Processor.

Probably I have to rename all the images in the folders, 'cause right now are like this: DJI_0457_output.tiff (from 0457 to 0925, all odd numbers in greyscale images folder) and DJI_0456_output.tiff (to 0924, all even number in RGB images folder). Am I asking to much to Matlab?

thank you so much for your time!

[Guillaume]

You can do pretty much anything you want in matlab. The amount of effort can of course vary. As long as you have a rule for matching images from one set to the images of the other it should be easy. If it's just matching them in numerical order then it's easy.

[Gabriele Ciccone]

Yes! I need to match them in numerical order. Do you have some suggestions or maybe a code the suits for my needs?

Thx!!

Answer 1

[Guillaume]

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({filelist1.name});
filelist2 = natsortfiles({filelist2.name});
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)));
end

[Gabriele Ciccone]

It works!

Thank you so much Guillame. I owe you!

[Guillaume]

If your problem is resolved, then please accept the answer that solved it.

Answer 2

[Ralf U.]

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);

[Gabriele Ciccone]

Yep, ok. But I need to combine 235 images from one folder to the 235 images of the other one: frist with first, second with second etc etc... I'm looking for an aoutomatic way to do this. Thx for any suggestion.

[Guillaume]

Note that imfuse will automatically convert a greyscale image to RGB if the other is RGB, no need to do this yourself.