Copy RGB image pixel value to another white background

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Malan Jayanka 2016-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/294742-copy-rgb-image-pixel-value-to-another-white-background

评论： Malan Jayanka 2016-7-24

I have an image with dimension 785*1300. I want to convert this image to 1300*1300. Here I created a 1300*1300 white image and i want to copy previous image into this image. How can I do this with matlab.

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采纳的回答

Image Analyst 2016-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/294742-copy-rgb-image-pixel-value-to-another-white-background#answer_228256

For your specific case here, you can simply use padarray() to pad white on the right and left sides. See the help. Let me know if you can't figure it out, otherwise you can Accept this answer.

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Image Analyst 2016-7-17

编辑：Image Analyst 2016-7-17

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Yes, that should work. Doesn't it? This works fine for me:

colorImage = imread('peppers.png');
subplot(1, 2, 1);
imshow(colorImage);
padding = 100;
paddedImage = padarray(colorImage, [0, padding], 255);
subplot(1, 2, 2);
imshow(paddedImage);