Split an image into pieces

Question

I have a 128x1500 image that I need to split into pieces (matlab reads it as 1500x128). But regardless of how columns or rows are oriented, it is a rectangle that's wider than it is tall. I need to figure out how to just split it into 10 or so different pieces (all the same height). The image is a .tiff so online programs that do this don't accept it. I'm working in matlab right now, so if there's a way to do it there that'd be great, but any way to do it at all would be very helpful.

What output do you want? Do you want to inspect the fragments in matlab or save them to tiffs? — Buck Thorn, Jul 24 '13 at 21:50

score 3 · Accepted Answer · answered Jul 24 '13 at 21:42

3

input = rand(1500,128,3); %read your .tiff here

N = 8;
h = 128/N;

img = cell(N,1);
for k = 1:N,
    img{k} = input(:,(k-1)*h+1:k*h,:);
end

imshow(img{3});

I used N=8 because you specified that you wanted "same height".

answered Jul 24 '13 at 21:42

Heretron

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score 3 · Answer 2 · answered Jul 24 '13 at 22:31

3

Slightly different, starting from the directory containing your tif:

N = 150; % width of individual images, final size: N x 128 (x3)
img = imread(tif_file_name);
M = floor(size(img,1)/N);
img=mat2cell(img(1:M*N,:,:),N*ones(M,1),128,3);
for ii=1:length(img)
    imwrite(img{ii},['test' num2str(ii) '.tif'],'tif')
end

Set N once you decide on a desired output size and specify the filename in tif_file_name.

answered Jul 24 '13 at 22:31

Buck Thorn

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Note that a number `size(img,1) - N*M` of trailing columns in your image array are not saved, but this can be readily changed. – Buck Thorn Jul 25 '13 at 11:19

Split an image into pieces

2 Answers2