Divide an Image of an Arbitrary Size Into 512 * 512 Blocks

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Nour Aburaed 2018-6-27

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回答： Image Analyst 2018-6-27

Hello Everyone. This is my first time posting a question here, I will try to explain as best as I can (sorry for the not-so-good English lol).

I have an image of size 11772 x 11396. I want to divide it into 512 x 512 non-overlapping blocks. I tried to use reshape(img, 512, 512, []), but it gave me an error that basically means the number of pixels in the original image is not divisible by 512. What is the best way to overcome this problem?

This is the exact error message (in case it is needed): Error using reshape Product of known dimensions, 262144, not divisible into total number of elements, 134153712.

Thanks.

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Answer 1

Image Analyst 2018-6-27

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https://ww2.mathworks.cn/matlabcentral/answers/407635-divide-an-image-of-an-arbitrary-size-into-512-512-blocks#answer_326491

See the FAQ: https://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F for two or three ways to do it.

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Answer 2

KSSV 2018-6-27

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https://ww2.mathworks.cn/matlabcentral/answers/407635-divide-an-image-of-an-arbitrary-size-into-512-512-blocks#answer_326478

This link will help you: https://in.mathworks.com/matlabcentral/answers/362262-i-have-a-32-32-matrix-i-want-to-take-mean-of-each-4-4-so-that-the-matrix-is-reduced-to-8-8-array

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Nour Aburaed 2018-6-27

It doesn't seem relevant to my question because 32 x 32 is divisible by 4, they can be easily reduced to 8x8 blocks. My problem is that the number of pixels in my original image is not divisible by 512.