title: How to apply FAST on a set of points?
body: <p>I have obtained the contours in a image and I want apply FAST algorithm to detect feature points on the contour path.</p>
  
  <p>How to apply FAST on a series of points rather that the entire image?</p>
  
  <p>I assume that FAST when applied on these points will require the data from the image also.
  I want to implement a function as below</p>
  
  <pre><code>    feature_points = getFAST(CvPoints Array_to_check, CvMat Image);
  </code></pre>
  
  <p>or</p>
  
  <pre><code>   feature_points =  getFAST(CvPoint Array_to_check, uchar* Image.data());
  </code></pre>