how to divide rgb image into blocks using for loop and find the rgb value for each block

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vasantha malairamar 2017-3-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/328673-how-to-divide-rgb-image-into-blocks-using-for-loop-and-find-the-rgb-value-for-each-block

评论： vasantha malairamar 2017-3-22

bs=8;
% M=zeros(96,96,3);
 row=r/bs;
 col=c/bs;
a=1;
k=0;
l=0;
b=1;
p=1;
noofp=96;
mR=zeros(768,768);
mG=zeros(768,768);
mB=zeros(768,768);
while(p<=noofp)
for i=1:row
    for j=1:col
     M{p}=re(8*k+1:8*a,8*l+1:8*b,:);
       mR=M{p}(i,j,1);
       mG=M{p}(i,j,2);
       mB=M{p}(i,j,3);
       d=[mR mG mB];
      p=p+1;
      l=l+1;
      b=b+1;
      end
      k=k+1;
      a=a+1;
      l=0;
      b=1;
  %     figure,imshow(M{p});
  end

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采纳的回答

KSSV 2017-3-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/328673-how-to-divide-rgb-image-into-blocks-using-for-loop-and-find-the-rgb-value-for-each-block#answer_257789

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bs=8;
M=rand(768,768,3);
[r,c,p] = size(M) ;
row=r/bs;
col=c/bs;
mR=M(:,:,1);
mG=M(:,:,2) ;
mB=M(:,:,3) ;
idx = 1:bs:r+bs ;
pos = [idx(1:end-1)' idx(2:end)'-1] ;
iwant = zeros(bs,bs,row) ;
for i = 1:row
    iwant(:,:,i) = mR(pos(i,1):pos(i,2),pos(i,1):pos(i,2)) ;
end