Resizing an image and dividing it into blocks

Question

Monsij Biswal 2018-5-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/401613-resizing-an-image-and-dividing-it-into-blocks

评论： Monsij Biswal 2018-5-20

%matlab code
I = imread(image);
[x y] = size(I);
x,y
[m n] = size(I); 
J = imresize(I, [256 256]); 
[x1 y1] = size(J);
x1,y1

I'm getting the output in the first case as x=400, y=2100 and in the second case as x1=256(expected), y1=768(unexpected). Additionally, I need to divide this image into 4 blocks of 128 x 128 pixels each. Can anyone please help me out?

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Answer 1

Walter Roberson 2018-5-20

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/401613-resizing-an-image-and-dividing-it-into-blocks#answer_321005

Read the documentation about what the output of size() is when the number of output arguments is not the same as the number of dimensions of the array.

To divide the image into so few pieces, just index it as needed.

More generally see mat2cell