# How can you extract odd and even rows and columns from image to seperate image outputs

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Saphsa Codling on 6 Dec 2019
Commented: Saphsa Codling on 6 Dec 2019
Hi there. I might be overthinking this. I often do but I'm trying to take the odd columns and rows and then even rows and columns from an image and then output them to form two seperate images in a subplot, with the original image maintained. I am confused at how I handle the additional dimension and I think this might be causing the output to fail. Any advice would be much appreciated. Code below.
function [RowsEven, ColsEven]=oddevenpic(A);
sizeofarray=size(A);
B=zeros(sizeofarray(1), sizeofarray(2));
C=zeros(sizeofarray(1), sizeofarray(2));
image(B);
image(C);
for r=1:sizeofarray(1);
for c=1:sizeofarray(2);
for RowsEven=mod(A,r)==0;
for ColsEven=mod(A,c)==0;
if (A(r)==RowsEven) | (A(c)==ColsEven);
(B(r)==RowsEven) & (B(c)==ColsEven);
else
(C(r)==(A(r)~=RowsEven)) & (C(c)==(A(c)~=ColsEven));
end
end
end
end
end
% %Display
subplot(3,2,3);
imshow(A);
title('Original Image')
%
subplot(3,2,2);
imshow(B);
title('Even Pixels Only')
%
subplot(3,2,1);
imshow(C)
title('Odd Pixels Only')
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0, 1, 1]);

JESUS DAVID ARIZA ROYETH on 6 Dec 2019
B=A(2:2:size(A,1),2:2:size(A,2),:);%Even Pixels Only
C=A(1:2:size(A,1),1:2:size(A,2),:);%Odd Pixels Only

#### 1 Comment

Saphsa Codling on 6 Dec 2019
Oh my goodness! Thank you so much. That has worked! Thank you. For Loop was unnecessary and killing me. Thanks again. :-)