How to make a vector of multiple images in double form by using function?

clc;
clear all;
close all;
for i=1:10
c{i}=imread(sprintf('s%d.jpg',i));
w = rgb2gray(c{i});
im = imresize(w,0.25);
mi = double(im);
q= im2vec(mi);
J = imnoise(mi,'salt & pepper')
figure,
imshow(mi)
medianFilteredImage = medfilt2(mi, [50 50]);
figure,
%imshow(medianFilteredImage)
% Find the noise.  It will have a gray level of either 0 or 255.
noiseImage = (mi == 0 | mi == 255);
% Get rid of the noise by replacing with median.
noiseFreeImage = noiseImage; % Initialize
noiseFreeImage(noiseImage) = medianFilteredImage(noiseImage); % Replace.
imshow(noiseFreeImage);
end

%Function
function mi=im2vec(im)

[N M]=size(im);
% for i=1:N
%     for j=1:N
%         mi((i-1)*N+j)=im(i, j);
%     end
% end
for i=1:N
    mi(1, (i-1)*M+1:M+(i-1)*M)=im(i,:);
end

1. Use rgb2gray command.
2. Resize to size 50x50 (using imresizecommand).
3. Make a vector (function is provided, also make it in double form).
4. Add salt and pepper noise.
5. Display noisy images.
6. Remove the noise using a suitable filter.
7. Display the noise free images.

[Jan]

The question is not clear. Does the code solve your problem? If not, which detail is still open? Please ask a specific question and explain the relation to the posted code.

[Hamza Zaheer]

No, the code does not solve my problem. My actual question is that, I have to read ten images in a loop and make the following changes to the images.I am attaching the images and the function mentioned in point #3 . Thanks in advance!

1. Use rgb2gray command.
2. Resize to size 50x50 (using imresizecommand).
3. Make a vector (function is provided, also make it in double form).
4. Add salt and pepper noise.
5. Display noisy images.
6. Remove the noise using a suitable filter.
7. Display the noise free images.

[Jan]

So is all you want to convert:

mi = double(im);

to

mi = double(im(:));

? What exactly is your quiestion? Attaching the images does not clear this detail.