title: how to do reverse operation of SVD in opencv?
body: <p>I am applying SVD on image using opencv 2.4.9 command SVDecomp. at the time of back substitution it asks rhs array.What is that array?</p>
  
  <p>commands:</p>
  
  <pre><code>     1. cv::SVDecomp(im_enc1,w,u,vt);
  </code></pre>
  
  <p>where w,u,vt are SVD components and im_enc1 is inputimage.</p>
  
  <pre><code>     2. cv::SVBackSubst(w,u,vt,rhs,im_enc2);
  </code></pre>
  
  <p>where w,u,vt are SVD components and im_enc2 is output image.</p>