MATLAB: How can i divide an image into 2 equal parts.horizontaly,

dividing an image into 2partsImage Processing Toolbox

this code works for 3 equal horizontal parts,how can i change it for 2 parts?
if true
[n,m]=size(im)   % im is your image
id=fix(n/3)
im1=im(1:id,:);
im2=im(id+1:2*id,:);
im3=im(2*id+1:n,:);
end

Best Answer

You can use imcrop, which will work for color and gray scale images:
[rows, columns, numberOfColorChannels] = size(im);
topHalf = imcrop(im, [1, 1, columns, floor(rows/2)]);
bottomHalf = imcrop(im, [1, ceil(rows/2), columns, floor(rows/2)]);
Or if you know for a fact that it's a 2D monochrome image
[rows, columns, numberOfColorChannels] = size(im);
middleRow = floor(rows/2);
topHalf = im(1:middleRow, :);
bottomHalf = im(1+middleRow:end, :);
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