I am executing the code below for run length encoding, how to make code for inverse Run Length encoding to get the decompressed image?

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tina jain 2015-4-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/214079-i-am-executing-the-code-below-for-run-length-encoding-how-to-make-code-for-inverse-run-length-enc

my code for RLE is
function  y = estring(str)
len = numel(str); %65536
i = 0;
count = zeros(1,len);
y=[];
while( i<len )
  j=0;
  count(i+1) = 1;
  while( true )
      j = j + 1;
      if( i+j+1 > len )
          break;
      end
      if( str(i+j+1)==str(i+1) )
          count(i+1) = count(i+1) + 1;
      else
          break;
      end
  end
    if( count(i+1)==1 )
        a=str(i+1);
        length(a);
        y = [y a];
        i = i + 1;
    else
        a=str(i+1);
        b=count(i+1);
        y =[y a b];
        i = i + b;
    end
end
end