title: Corner detection algorithm for mobile
body: <p>I am trying to find a good algorihtm that would detect corners in a image in a mobile phone. There are multiple algorithms to do that I am not sure which one will perform better in a memory and processor limited environment. </p>
  
  <p>Specifically I am trying to find a sudoku grid in a picture taken using the camera of the phone. I am using C# and could not find any libraries that has basic image processing features. I implemented a Sobel filter to do edge detection and that is where I stand.</p>
  
  <p>To make it clear the question is does anybody have any suggestions to use a specific algorithm or a library?</p>