how to break an image into sub images

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Rao
Rao el 4 de Sept. de 2012
Comentada: Walter Roberson el 19 de Oct. de 2021
i have an image having pixels 512*512 . i want to break it in equal sub images (for eg like into images of 8*8) and want to apply a function (can be any) on each sub image ??

Respuestas (3)

José-Luis
José-Luis el 4 de Sept. de 2012

Zainab Ishfaq
Zainab Ishfaq el 29 de Mayo de 2018
Editada: Walter Roberson el 13 de Feb. de 2020
Height=8; width=8;
currentimage = imread('Image.png');
[r,c,~]=size( currentimage );
count=0;
for i=0:Height:r
count=count+1;
for j=0:width:c
if((i+Height)<r && (j+width)<c)
Image=imcrop( currentimage ,[(i+1) (j+1) Height width]);
imwrite(Image,horzcat(currentfilename, num2str(count),'.tif'));
end
end
end
  9 comentarios
shital shinde
shital shinde el 21 de Feb. de 2020
Editada: shital shinde el 21 de Feb. de 2020
Thanks sir. It work now. I have one question. Can we parallelize the above example using parallel computing toolbox.
Walter Roberson
Walter Roberson el 21 de Feb. de 2020
Editada: Walter Roberson el 21 de Feb. de 2020
Yes. Just change for i to parfor i
As we have advised you before, the result will almost certainly be notably slower than your current code. But I know from your previous questions that you feel inclined to do that testing yourself.

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image-pro
image-pro el 19 de Oct. de 2021
i have an error please help
Error in p8 (line 11)
Image=imcrop(currentimage ,[(i+1) (j+1) Height width]);

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