MATLAB: I had divided an image into blocks where each block has 8*8 pixels .Now i want to find the energy of each block,for that i have to consider the energy of each pixels in a block and the calculations are given in the code below.

After making the calculation for each block i have to show the enery map of the image that is being divided into blocks ,but i am not geting it .Can you plz help me .Actualy i am trying to do block based seam carving
x=imread('cameraman.tif');
y=double(x);
[r c]=size(y);
bs=8; %size of each block
nob=(r/bs)*(c/bs);%number of blocks
kk=0;
for i=1:(r/bs)
    for j=1:(c/bs)
        Block(:,:,kk+j)=y((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs));
%block creation
          %ENERGY CALCULATION PER BLOCK
              for q=1:bs
              for p=1:bs
                  if((q-1==0)&&(p-1==0))
                              a=Block(q,p,kk+j);
                              b=0;
                              n=a-b;
                                  c=Block(q,p,kk+j);
                                  d=0;
                                  m=c-d;
                  elseif((q-1==0)&&(p-1~=0))
                      n=y(q:q,p)-y(q:q,p-1);
                              a=Block(q,p,kk+j);
                              b=0;
                              m=a-b;
                  elseif((q-1~=0)&&(p-1==0))
                     a=Block(q,p,kk+j);
                     b=0;
                     n=a-b;
                               m=y(q:q,p)-y(q-1:q-1,p);
                  else
                       n=y(q:q,p)-y(q:q,p-1);
                               m=y(q:q,p)-y(q-1:q-1,p);
                  end
                       s=n+m ;%  
                      en=s/nob;%Here the calculation for energy for block is being done.
         imshow(en) 
  % Here i want  to show  the energy map for the entier blocks but unfortunatly i am geting only a single spot.
              end
      end
      end
      kk=kk+(r/bs);
end         
         %%%%%%%%%% I GOT UR ANSWER BUT I'M NOT GETING THE CORRECT OUTPUT ,CAN U PLZZZZ HELP ME OUT.THE PBLM THAT I FACED IS PUT AS A COMMENT TO UR ANSWER PLZ CHECK IT..

Best Answer

Is "en" an image? I don't see any indices being used when you set values for it. It looks to me like it is a scalar so that would show up as a single point.
Maybe you want this
en(p, q)=s/nob;
and then after the q and p loops have finished (when you'll have the complete image), do the imshow.
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