Montage of two Images

Hello Everyone, I have a code that finds an image from a path. That image is then cropped. The Cropped image is then converted into a Binary Image, I would like to stitch these pictures together as one figure. I tried using Montage. I however recieve errors using Montage. here is my code :

   filePattern = fullfile(myFolder, '*.tif');
imageFiles = dir(filePattern);
for k = 1:length(imageFiles)
  ImagebaseFileName = imageFiles(k).name; %image name 
  image_original = fullfile(myFolder, ImagebaseFileName); %original image
  %fprintf(1, 'Now reading %s\n', fullFileName);
   imageArray = imread(image_original);
   image_cropped=imcrop(imageArray, [0 0 632 1024]); %Cropping Image 

   %%Binary Gradient Mask 
   [~, threshold] = edge(image_cropped, 'sobel');%Binary Gradient Mask 
        fudgeFactor = .5;
        image_bin_grad_mask = edge(image_cropped,'sobel', threshold * fudgeFactor); % Binary Gradient Mask Image

montage(image_bin_grad_mask,image_cropped);  % Display image.

end

Also I would like to store the created montage as a seperate image.Any suggestions. Your help, effort and time are much appreciated.

Best Regards

Answer 1

[Nut]

Hi,

if you need only to display the two images side by side you can use subplot.

Instead, if you need to join the two images together into a unique one, I think the cat function may be helpful for you:

https://it.mathworks.com/help/matlab/ref/cat.html

[Sreejoe Kaniyamparambil]

Hi Nut, Thankl you very much, I was completely unaware of this function. I tried using it. I have three images. The center is the original Picture and on the sides are supposed to be the gradient images. Although cat worked properly and my image file is even exactly thrice the size of one. However when the image is displayed I get the origonal picture only displayed.

[Sreejoe Kaniyamparambil]

Okay, found the mistake, the original image wasn't a logical image. I converted the 2 gradient images to uint8 images, using im2unit8. Thank you so much for your help!!!

[Nut]

You're welcome, I'm glad it works for you. Thanks for accepting my answer, kind regards.

Answer 2

[Rik]

Montage is rather picky about the image format. It wants the following input format: (rows,columns,colors,pages). What you tried to do is therefor impossible with montage. If your goal is to show the two images side by side, you can use the subplot functionality.

subplot(2,1,1)%(total_rows,total_cols,current_index)
imshow(image_bin_grad_mask)
title('Original image')
subplot(2,1,2)
imshow(image_cropped)
title('Cropped image')

[Sreejoe Kaniyamparambil]

Hi, thank you very much for your answer. I tried it using subplot alread. I would however for comparison purposes like to have a 'stitched image'. Which is why I opted against subplot/subimage. You said montage is rather picky, all my images are from one Video file ( each frame was stored as an Image). Meaning they all have the same size, the same number of rows and columns etc., what would be the correct way to montage the images? Regards

Joe

[Rik]

You said in your question you wanted to put both a cropped image and the original in one frame. That means you have unequal image sizes.

If you want to make a montage of a video file, you need to make sure that the 3rd dimension is the color dimension and the forth dimension is the different frames. If you have those two switched around, you can use permute to change the order.

montage_friendly_format=permute(video,[1 2 4 3]);

Answer 3

[Hannan Awan]

use figure; before using montage command.