Image 2:1

Hello everyone.

I want to reduce 4 images of 256 x 256 pixels in a ratio of 2:1

.

After reducing it, I want to combine it side by side and one under the other so that it is a 2x2 matrix and make it a single picture.

I want to calculate the mean and standard deviation of this 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]

This is essentially a duplicate of this question

https://www.mathworks.com/matlabcentral/answers/1977519-image-zoom-2-1

Since the images are already 256x256, and they aren't JPGs, I suspect that this code that everyone is copy-pasting wasn't written by anyone who is pasting it. Given that, it's not clear whether any resizing is necessary.

Concatenate images of compatible size using [] operators or cat().

[elTurco]

I am aware that it is 256 x 256, what I want to do is to reduce this image to 2:1, that is to make these 128x128 pixels

[DGM]

Then you can resize them to that specific size

A = imresize(A,[128 128]);

Or you can resize them by that specific factor

A = imresize(A,0.5);