processing several images blocks

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Rusmaya Luthfina
Rusmaya Luthfina 2011-10-26
hi all,
i have 10 jpg image with same size 320x320, i've divided each image into 4x4 block. i need to access each block but it's failed. here's the codes
folder = 'F:\Maya\pengenalan pola\tugas image retrieve\image';
fileList = dir(fullfile(folder,'*.jpg'));
for i = 1:length(fileList)
I{i} = imread(fullfile(folder,fileList(i).name));
out{i} = mat2cell(I{i},ones(320/80,1)*80,ones(320/80,1)*80,3);
end
imshow(out{1, 1, 1})
it returns error ??? Error using ==> iptcheckinput Function IMAGEDISPLAYVALIDATEPARAMS expected its first input, I, to be one of these types:
double, single, uint8, uint16, uint32, int8, int16, int32, logical
Instead its type was cell.
Error in ==> imageDisplayValidateParams at 12 iptcheckinput(common_args.CData, {'numeric','logical'},...
Error in ==> imageDisplayParseInputs at 79 common_args = imageDisplayValidateParams(common_args);
Error in ==> imshow at 199 [common_args,specific_args] = ...
but when i load only a single file like this
j = imread('Milk.jpg');
out = mat2cell(j,ones(320/80,1)*80,ones(320/80,1)*80,3);
imshow(out{1, 1})
it's just run correctly like what i need, returns image block(1,1)
really need you helps
thank you,
Maya

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回答（2 个）

Walter Roberson
Walter Roberson 2011-10-26
Note that out{1,1,1} is the same as out{1}, which is not the same as out{1}{1,1}
  1 个评论
Rusmaya Luthfina
Rusmaya Luthfina 2011-10-26
i got it Mr. Roberson, thx u.. i change it to imshow(out{1}{n}), where n is the block, and it works,
my i ask u a question??
is sit possible to perform RGB histogram to each blocks of each picture?
how do we do that?
thanks,
maya

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Rusmaya Luthfina
Rusmaya Luthfina 2011-10-26
my images are RGB, can we perform RGB histogram to each block of each image?

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