code: public boolean setDescription(PyramidKltFeature feature) {
  		for (int layer = 0; layer < image.getNumLayers(); layer++) {
  			float scale = (float)image.getScale(layer);
  			float x = feature.x / scale;
  			float y = feature.y /  scale;
  
  			setupKltTracker(layer);
  
  			feature.desc[layer].setPosition(x, y);
  			if( !tracker.setDescription(feature.desc[layer]) )
  				return false;
  		}
  		return true;
  	}
docs: Sets the feature's description up.  The feature's (x,y) must have already been set
  and {@link #setImage} been called.
  
  @param feature Feature's whose description is being setup.
  @return true if there was sufficient information to create a feature or false if not