how to divide an image into blocks

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natasha malhothra 2015-6-16

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https://ww2.mathworks.cn/matlabcentral/answers/223978-how-to-divide-an-image-into-blocks

编辑： Walter Roberson 2017-2-10

采纳的回答： Anushka

an image shoud be divided into several blocks of 8 by 8 pixel

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ROSE MARY KATIKALA 2017-2-10

done but for road detection project i just need to make an image of 0's n 1's of roaads and non roads parts... how can i do that? can u give me a clear explanation.. im beginner in matlab so..

Walter Roberson 2017-2-10

You should open a new question for that, showing some sample images, and showing the work you have done.

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

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采纳的回答

Anushka 2015-6-16

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https://ww2.mathworks.cn/matlabcentral/answers/223978-how-to-divide-an-image-into-blocks#answer_182815

编辑：Walter Roberson 2017-2-10

在 MATLAB Online 中打开

J = imresize(M1, [256 256]);
[r c]=size(J);
bs=32; % Block Size (32x32)
nob=64 % Total number of 32x32 Blocks
% Dividing the image into 32x32 Blocks
kk=0;
l=0;
[F]=zeros(1,64);
%[B0]=zeros(32,32);
for i=1:(r/bs)
  for j=1:(c/bs)    
    B0=J((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs),3);      
  end
  kk=kk+(r/bs);
end
% And to get the RGB values I used the following code
for x=1:32
  for y=1:32
    R=B0(x,y,1);
    G=B0(x,y,2);
    B=B0(x,y,3);  
  end
end