padarray for resizing canvas of images

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dan kin 2014-10-18

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https://ww2.mathworks.cn/matlabcentral/answers/159107-padarray-for-resizing-canvas-of-images

评论： Image Analyst 2014-10-18

Hi,

I have multiply PNG images in one folder with different images sizes (height and width), how can I use the padarray function so they will have the same canvas size (according to the bigger image) without resizing them?

Thanks a lot

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Answer 1

Image Analyst 2014-10-18

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Not hard. Just get the sizes of both, get the max, and figure out what to pass to padarray()

[rows1, columns1, numberOfColorChannels1] = size(image1);
[rows2, columns2, numberOfColorChannels2] = size(image2);
maxRows = max(rows1, rows2);
maxColumns = max(columns1, columns2);

and so on...

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dan kin 2014-10-18

在 MATLAB Online 中打开

Thanks.

Why in the code rows3 and columns3 do not match rows2 and columns2?

Code:

clc;
clear;
img=imread('pears.png');
[rows1, columns1, numberOfColorChannels1] = size(img);
rows2=1000; 
columns2=2000;
imgpad = padarray(img,[rows2 columns2],'both');
imshow(imgpad);
[rows3, columns3, numberOfColorChannels1] = size(imgpad);