Image zoom 2:1

I have 4 256x256 pixel gray images. I want to reduce these 4 images at a ratio of 2:1 and then combine them side by side to form a single image. Finally, I want to find the mean and standard deviation of the last image I have obtained. How can i do it?

% Read the four standard images

image1 = imread('image1.jpg');

image2 = imread('image2.jpg');

image3 = imread('image3.jpg');

image4 = imread('image4.jpg');

% Resize the images to the desired size of 256x256 pixels

image1_resized = imresize(image1, [256 256]);

image2_resized = imresize(image2, [256 256]);

image3_resized = imresize(image3, [256 256]);

image4_resized = imresize(image4, [256 256]);

% Create a blank canvas for the combined image

combined_image = uint8(zeros(256, 512, 3));

% Place the resized images side by side in the combined image

combined_image(:, 1:256, :) = image1_resized;

combined_image(:, 257:512, :) = image2_resized;

combined_image(:, 513:768, :) = image3_resized;

combined_image(:, 769:1024, :) = image4_resized;

% Display the combined image

imshow(combined_image);

Answer 1

[DGM]

% these aren't JPGs
A = imread('image1.bmp');
B = imread('image2.bmp');
C = imread('image3.bmp');
D = imread('image4.bmp');

% these are all already 256x256
% so i don't know why you're resizing them

% concatenate images using ... concatenation
outpict = [A; B; C; D];
imshow(outpict,'border','tight')

% do whatever you wanted to the last image
Dmean = mean(D(:))

Dmean = 193.5538

Dstd = std(double(D(:)))

Dstd = 33.0725