code: public void process( double c_x , double c_y , TupleDesc_B feature ) {
  		describe.process((int)c_x,(int)c_y,feature);
  	}
docs: Computes the descriptor at the specified point.  If the region go outside of the image then a description
  will not be made.
  
  @param c_x Center of region being described.
  @param c_y Center of region being described.
  @param feature Where the descriptor is written to.