docs: private void describeImage(T left , ImageInfo<TD> info ) {
  		detector.process(left);
  		for( int i = 0; i < detector.getNumberOfSets(); i++ ) {
  			PointDescSet<TD> set = detector.getFeatureSet(i);
  			FastQueue<Point2D_F64> l = info.location[i];
  			FastQueue<TD> d = info.description[i];
  
  			for( int j = 0; j < set.getNumberOfFeatures(); j++ ) {
  				l.grow().set( set.getLocation(j) );
  				d.grow().setTo( set.getDescription(j) );
  			}
  		}
  	}