How can I show 10 pixels width in all directions for an image?

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Hadeel H
Hadeel H 2021-6-1
评论： Hadeel H 2021-6-3
I am trying to find a block of the image, such as, the perimeter of the image, 10 pixels width in all directions. Can you please advise?

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采纳的回答

Walter Roberson
Walter Roberson 2021-6-2
Ran in:
img = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/638445/download.jpg');
n = floor(size(img,2)/2);
leftb = imbinarize(rgb2gray(img(:,1:n,:)));
left = repmat(im2uint8(leftb), [1 1 size(img,3)]);
right = img(:,n+1:end,:);
newimg = [left,right];
imshow(newimg)

更多回答（1 个）

Adam Danz
Adam Danz 2021-6-1
编辑：Adam Danz 2021-6-2
Ran in:
Clarified question in comment below:
> want to display the same image below but half colored and half binary!
Follow the steps in this blog.
figure();
tiledlayout(1,3,'Padding','none','TileSpacing','tight')
rgb = imread('download.jpg');
nexttile()
imshow(rgb);
title('Original image')
nexttile()
imshow(rgb);
I = rgb2gray(rgb);
hold on
h = imshow(I);
[M,N] = size(I);
halfway = round(N/2);
alpha_data = [ones(M,halfway),false(M,N-halfway)];
set(h, 'AlphaData', alpha_data);
title('Half grayscale')
nexttile()
imshow(rgb);
BW = imbinarize(I);
hold on
h = imshow(BW);
[M,N] = size(I);
halfway = round(N/2);
alpha_data = [ones(M,halfway),false(M,N-halfway)];
set(h, 'AlphaData', alpha_data);
title('Half binary')
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Adam Danz
Adam Danz 2021-6-2
Your comment above is clear. If that image was shared from the beginning, it would have save lots and time and back-and-forth Q&A.
But I still don't know what that has to do with your original question, "How can I show 10 pixels width in all directions for an image?"

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