how to combine the blocks

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Sharen H 2013-7-20

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https://ww2.mathworks.cn/matlabcentral/answers/82678-how-to-combine-the-blocks

clc
clear all
x= 
[2 3  4 5
   2 3  4 5
   1 2  3 4
   1 2  3 4]
[r c]=size(x);
bs=2; % Block Size (8x8)
nob=(r/bs)*(c/bs); % Total number of 8x8 Blocks

% Dividing the image into 2x2 Blocks

kk=0;
for i=1:(r/bs)
for j=1:(c/bs)
Block(:,:,kk+j)=x((bs*(i-1)+1:bs*(i-1)+bs),(bs*(j-1)+1:bs*(j-1)+bs));
BlockM=Block(:,:,kk+j);
  BlockMM=mean(BlockM(:));
  Block(:,:,kk+j)=BlockMM
end
kk=kk+(r/bs);
end

i have divided the matrix into blocks of 2x2 size and i have stored it in Block(:,:,i) separately. can any one please help me to combine into original matrix thanks in advance