How can I divide image into 3x3 pixels?

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Abdullah
Abdullah on 28 Oct 2016
Commented: Abdullah on 27 Nov 2016
I want to divide image into none-overlapping blocks into size of 3x3 pixels

Answers (3)

Image Analyst
Image Analyst on 28 Oct 2016
Depending on what you want to do with the 3x3 subimages, you might also want to look at imfilter(), conv2(), or nlfilter().

Matt J
Matt J on 28 Oct 2016
Edited: Matt J on 28 Oct 2016
Using mat2tiles ( Download ),
Blocks = mat2tiles(yourImage,[3,3]);
  3 Comments
Matt J
Matt J on 30 Oct 2016
@Abdullah,
I'm also not clear on the distinction "3 pixels by 3 pixels not 3x3 blocks". Bear in mind though, that mat2tiles is a general tool for dividing up the image into non-overlapping sub-images. You can divide the image up into blocks of other sizes, if it suits you.

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Alex Taylor
Alex Taylor on 7 Nov 2016
The Image Processing Toolbox function blockproc can be used to execute any generic operation on blocked regions of your image.
I'm not sure what the distinction "3x3 pixels" vs. blocks vs. tiles is, as other users have posted.
  1 Comment
Abdullah
Abdullah on 27 Nov 2016
Dear @Alex Taylor I tried it already but the processing time take so long...I am using workstation computer 8 core with 16GB Ram but it take really long...is there any other faster way ?

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