Best Variable Type to Store and Plot Multiple Images Obtained with Regularized Filtering

Hello.

I've recently started using MATLAB and the Im. Proc. Toolbox to perform some basic image adjustment routines. Right now I'm interested in restoring a blurred, noisy image via regularized filtering using the deconvreg command. Specifically, I want to create a loop to process the same image with deconvreg three times, and in each iteration I want to use a different noise power value np. Since I've only recently started using MATLAB, I'm not sure which variable type I should use to store the three processed images, though cell arrays and structures seem to be good candidates from what I've read thus far. I'm also having trouble in implementing a for loop to implement this repeated use of deconvreg. Here's the code that I used to try the cell array approach:

np = [0.7, 0.8, 0.9]; %Noise power values to be used. 
images = {};
for n = np(:)
    frest = deconvreg(blurred_noisy, PSF, noisePower); %blurred_noisy is the image; PSF is set beforehand, too. 
    images{find(n==np),1} = frest; %Attempt at creating a cell array to store processed images. Does not work. 
end
figure
for k = 1:3 %Attempt at plotting the three processed images. 
    subplot(1,3,m)
    imshow(images{m})
end

Note that blurred_noisy is a double-type image with three channels (size 720x1082x3).

My question is: How can I set up a functioning for loop and what variable type should I use to store the three images? I realize that these are actually two questions, but I think it's reasonable to ask both in the same post because they're closely related.

Thanks in advance!

Answer 1

[Hiro Yoshino]

When the images you are storing in a variable are consistent size-wise, a standard array is good enough.

Imagine that your image is [256 x 256 x 3] and you have n images, then the the array that stores your images wil be [256 x 256 x 3 x n].

Cell is used to accomodate multiple variables with different sizes and different types in a single cell, and thus this is very flexible. However, dealing with cell is a bit tricker than array, table, ... and other containers that have consistent variables in themselves.