Montage with Raster Scan

Hello, I have a cell array of images obtained by scanning in a raster scan as illustrated below

I want to create a montaged image, and can do it successfully when xsteps & ysteps =3 (so 9 images in the image Array "imgArray")

montageImage = [imgArray{1}, imgArray{4}, imgArray{7}; imgArray{2}, imgArray{5}, imgArray{8}; imgArray{3}, imgArray{6}, imgArray{9}];

However, I want it generalised for any values of xstep and ystep.

Answer 1

[KSSV]

Read about montage in the documentation, there is an option of specifying size..with this you can show them in your desired step/ size.

https://in.mathworks.com/help/images/ref/montage.html

montage(fileNames, 'Size', [m n]);

[Jason]

Hi, thanks for your reply. I did actually consider this first, but my image files are not on disk and hence no filenames. they are in memory in a cell array.

[KSSV]

If images are present, filenames are enough to show.

[Jason]

Hi, so they are saved in appdata and I get the cell array of images by:

imgArray=getappdata(0,'stack')

What do I pass as filenames, just "imgArray"

OK trying this doesn't work:

figure
montage(imgArray, 'Size', [3 3]);

The specified filename is not a string.

Answer 2

[Jason]

OK, I couldn't get the "montage" function to work so used this instead

ny=ysteps; nx=xsteps;       

D=[];
for j=1:ny
  C=[];  
  for i=1:nx
    idx=1+ (i-1)*ny;
    idx=idx+(j-1)
    B=imgArray2{idx};
    C = horzcat(C,B);    
  end
 D=vertcat(D,C); 
end

figure
imshow(D)