Hi Tomer
To apply "adapthisteq" (Adaptive Histogram Equalization) only to the right half and the bottom half of the image, please follow the steps given in the code snippet below.
% 1.) Read the image
img = imread('img.jpg');
% 2.) Get the size of the image
[rows, cols] = size(img);
% 3.) Get the midpoint for both dimensions
midRow = rows / 2; midCol = cols / 2;
% 4.) Separate the image into four quarters
topLeft = img(1:midRow, 1:midCol);
topRight = img(1:midRow, midCol+1:end);
botLeft = img(midRow+1:end, 1:midCol);
botRight = img(midRow+1:end, midCol+1:end);
% 5.) Apply "adapthisteq" to the quaters belonging to right half and bottom half
topRightEq = adapthisteq(topRight);
bottomLeftEq = adapthisteq(botLeft);
bottomRightEq = adapthisteq(botRight);
% 6.) Reconstruct the bottom and right halves
bottomHalfEq = [bottomLeftEq, bottomRightEq];
rightHalfEq = [topRightEq; bottomRightEq];
% 7.) Reconstruct the image with equalization applied only once to each part
imgModified = img; % Start with the original image
imgModified(1:midRow, midCol+1:end) = rightHalfEq(1:midRow, :); % Update right half
imgModified(midRow+1:end, :) = bottomHalfEq; % Update bottom half
% 8.) Display the original and modified images for comparison
figure;
subplot(1, 2, 1);
imshow(img, []);
title('Original Image');
subplot(1, 2, 2);
imshow(imgModified, []);
title('Modified Image');
Please refer to the following documentation link to learn more about the "adapthisteq" function.
Hope this helps.
