Splitting image in matlab

Need to split an image in matlab into 4 quadrants and swap the top left and bottom left quadrants

Answer 1

[Walter Roberson]

Hint: [end/2+1:end,1:end/2]

Answer 2

[Image Analyst]

Did you try indexing/assignment:

rgbImage = imread('peppers.png'); % Read input image
% Get the dimensions of the image.  
% numberOfColorChannels should be = 1 for a gray scale image, and 3 for an RGB color image.
[rows, columns, numberOfColorChannels] = size(rgbImage);
outputImage = rgbImage; % Initialize
middleRow = ceil(rows/2);
middleColumn = ceil(columns/2);
% Paste lower left onto upper left.
outputImage(1:middleRow, 1:middleColumn, :) = rgbImage(middleRow+1:end, 1:middleColumn, :);
% Paste upper left onto lower left.
outputImage(middleRow+1:end, 1:middleColumn, :) = rgbImage(1:middleRow, 1:middleColumn, :);
imshow(outputImage);

Answer 3

[Guillaume]

Another way:

[height, width, ~] = size(yourimage);
splitimage = mat2cell(yourimage, [ceil(height/2), floor(height/2)], [ceil(width/2), floor(width/2)], size(yourimage, 3));
swappedimage = cell2mat(rot90(splitimage, 2)');