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How to Create Alternating Black Columns Across an Image?

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Richard Zareck
Richard Zareck 2017-9-10
评论： Jose Marques 2017-9-10
I have an image X and I would like to create black columns going across the image that are 16 pixels thick with a distance of 16 pixels between each column and I have no idea how to do this. The best I could do was make one column using this line of code:
X(:,1:16,:) = 0;
Also I am not allowed to solve the problem using loops.

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Jose Marques
Jose Marques 2017-9-10
Hello Richard! You can try this:
size_of_column = 16;
img = imread('image_exemple.jpg');
imshow(img);
mask = zeros(size(img));
for i=1:size(mask,2)
if(mod(round(i/size_of_column),2) == 1)
mask(:,i,:) = 1;
end
end
figure();
img_final(:,:,:) = uint8(double(img(:,:,:)).*mask(:,:,:));
imshow(img_final)
The result:
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Walter Roberson
Walter Roberson 2017-9-10

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