title: Detecting SURF features - disappointed by the performance
body: <p>I was looking to extract SURF features (or something similar) in an application that gets new images at 25 FPS. I thought feature extracting would be possible at least close to real time. I tried OpenSURF with the same parameters that are supplied by the demo file, and was quite devastated to see that at a resolution of 640x480 my 2 GHz Core2 Duo takes 5 to 8 seconds for a single image.</p>
  
  <p>1) Is that normal?</p>
  
  <p>2) Can I adjust parameters to get worse results but faster execution time?</p>
  
  <p>3) I actually do not require scale / rotation invariance, just good features to track between frames (the camera is in a fixed position) / between different lighting conditions. Is there a viable alternative that might run (near) real time?</p>