Image zoom 2:1

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elTurco
elTurco 2023-6-2
编辑： DGM 2023-6-2
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);

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回答（1 个）

DGM
DGM 2023-6-2
编辑：DGM 2023-6-2
Ran in:
% 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

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