How do I move an image into a cell in matlab?

Question

I built a 1*5 cell named N and need to copy an image (img)matrix into each entry in it what should I do? This is what I came up with but it doesn't work.... I'm trying to avoid for loops so my code will be faster.

function newImgs = imresizenew(img,scale)  %scale is an array contains the scaling factors to be upplied originaly an entry in a 16*1 cell
    N = (cell(length(scale)-1,1))'; %scale is a 1*6 vector array
      N(:,:) = mat2cell(img,size(img),1); %Now every entry in N must contain img, but it fails
    newImgs =cellfun(@imresize,N,scale,'UniformOutput', false); %newImgs must contain the new resized imgs 
end

Answer 1

From what I've understood from your question, and agreeing with Cris Luengo on the loop part, here is what I would suggest. I assume, that scale(1) = 1 or something like that, because you initialize N = (cell(length(scale) - 1, 1))', so I guess one of the values in scale is not important.

function newImgs = imresizenew(img, scale)

  % Initialize cell array.
  newImgs = cell(numel(scale) - 1, 1);

  % Avoid copying of img and using cellfun by directly filling 
  % newImgs with properly resized images.
  for k = 1:numel(newImgs)
    newImgs(k) = imresize(img, scale(k + 1));
  end

end

A small test script:

% Input
img = rand(600);
scale = [1, 1.23, 1.04, 0.84, 0.5, 0.1];

% Call own function.
newImgs = imresizenew(img, scale);

% Output dimensions.
for k = 1:numel(newImgs)
  size(newImgs{k})
end

Output:

ans =
   738   738

ans =
   624   624

ans =
   504   504

ans =
   300   300

ans =
   60   60