code: public static int round( int top , int div2 , int divisor ) {
  		if( top > 0 )
  			return (top + div2)/divisor;
  		else
  			return (top - div2)/divisor;
  	}
docs: Specialized rounding for use with integer wavelet transform.
  
  return (top +- div2) / divisor;
  
  @param top Top part of the equation.
  @param div2 The divisor divided by two.
  @param divisor The divisor.
  @return