Extract multiple images from a single image

Question

MD RESHAD UL HOQUE 2019-2-19

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https://ww2.mathworks.cn/matlabcentral/answers/445705-extract-multiple-images-from-a-single-image

评论： MD RESHAD UL HOQUE 2019-2-19

I have a big image (3064x7535x3). I need to crop multiple images ( as many as possible) with the size of 218x178x3 from that single image and save those image in .jpg on a forder.

I could not figure it out how to do it. Any suggestion?

Thanks

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MD RESHAD UL HOQUE 2019-2-19

There is no restrictions ...

Walter Roberson 2019-2-19

在 MATLAB Online 中打开

So to confirm, you want to output

BigImage(1:218, 1:178, 1:3)

and

BigImage(2:219, 1:178, 1:3)

and

BigImage(1:218, 2:179, 1:3)

and so on? If so, if every consecutive subset of the appropriate size is to be output, then you will have 2847 x 7358 = 20948226 different output images to write to files.

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Answer 1

Walter Roberson 2019-2-19

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https://ww2.mathworks.cn/matlabcentral/answers/445705-extract-multiple-images-from-a-single-image#answer_361645

在 MATLAB Online 中打开

C = mat2cell(YourBigImage(1:3052, 7476,:), 218*ones(1,4), 178*ones(1,42), 3);

Now C will be a 4 * 42 cell array, each entry of which is a non-overlapping sub-image from the original array. You can then save each of those 168 images to an individual file. You will have to decide on the naming convention for the file, though.