how to combine subimages which is split into window size of 8x8 by using mat2cell into one single image ?

Question

rikki 2018-3-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/386621-how-to-combine-subimages-which-is-split-into-window-size-of-8x8-by-using-mat2cell-into-one-singl

编辑： rikki 2018-3-7

          a=VideoReader('test.mp4 ');
          b = read(a,1 );
          c=rgb2gray(b ); 
          nframe=a.NumberOfFrames ;
          for i=115:116 
              prev_frame =read(a,i-1 ); 
              e=rgb2gray(prev_frame  ); 
              figure 
              imshow(e );  
              pause(0.2)
              current_frame =read(a,i); 
              h=rgb2gray(current_frame ); 
              figure 
              imshow(h);  
              rows = 8 ; 
              columns = 8 ; 
              [H,W,~] = size(c );
              szH = [repmat(fix(H/rows),1,rows )]; 
              szW = [repmat(fix(W/columns),1,columns )]; //to split into window size of 8x8 as per my algorithm
              C = mat2cell(e, szH, szW )'; 
              D = mat2cell(h, szH, szW )'; 
              figure
              for j=1:rows*columns 
                  subplot(rows,columns,j), imshow( C{j } ) //to plot above cells
              end  
              figure
              for j=1:rows*columns 
                  subplot(rows,columns,j), imshow( D{j } ) 
              end  
              for k=1:1*8
                  o=1:1*8
                  G=cell2mat(C(k,o)'); 
                  figure
                  imshow(G);at this point i am getting images which i am not able to recombine.kindly suggest something here
              end
              for k=1:8
                  o=1:8
                  H=cell2mat(D(k,o)'); 
                  figure
                  imshow(H);
              end
              w=std(double(G));
              figure
              plot(w);
              b=std(double(H));
              figure
              plot(b);
              level=graythresh(G);
              level=graythresh(H);
              if level>level1
                  T=im2bw(G);
                  figure
                  imshow(T);
              else
                  P=im2bw(H);
                  figure
                  imshow(P);
              end
          end

What is mistake in the code? Actually after splitting into window size of 8x8 by using mat2cell() I am not able to reconstruct back into the whole image which is needed as per the algorithm in order to perform other operations. So plz suggest some command or technique.

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Image Analyst 2018-3-6

Tip: in the MATLAB editor, type control-a (to select all), then control-i (to fix indenting), then control-c to copy, then come here and type control-v (to paste). Then highlight the code and click the {}Code icon button above the edit text box.

rikki 2018-3-7

sir i have done the changes

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Answer 1

KSSV 2018-3-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/386621-how-to-combine-subimages-which-is-split-into-window-size-of-8x8-by-using-mat2cell-into-one-singl#answer_308755

在 MATLAB Online 中打开

Read about cell2mat.

c = cell(2,2) ;  
for i = 1:2
    for j = 1:2
        c{i,j} = rand(2) ;
    end
end
iwant = cell2mat(c)

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rikki 2018-3-7

编辑：rikki 2018-3-7

is there any other command other than cell2mat to recombine all 8x8 images again into one image which i have got from mat2cell? and please check from there imshow(G); here only i am stuck which is affecting the desired output

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