std_coeffs.h

JPEG2000实现的源码

/*****************************************************************************/
/* Copyright 1998, Hewlett-Packard Company                                   */
/* All rights reserved                                                       */
/* File: "std_coeffs.h"                                                      */
/* Description: Contains built-in kernel coefficients.                       */
/* Author: David Taubman                                                     */
/* Affiliation: Hewlett-Packard and                                          */
/*              The University of New South Wales, Australia                 */
/* Version: VM8.0                                                            */
/* Last Revised: 28 July, 2000                                               */
/*****************************************************************************/
#ifndef STD_COEFFS_H
#define STD_COEFFS_H

/* ================================ Analysis ============================== */

/* W9X7 Low-pass analysis filter */

#define h9X7_0 ( 6.02949000000000e-01)
#define h9X7_1 ( 2.66864000000000e-01)
#define h9X7_2 (-7.82230000000000e-02)
#define h9X7_3 (-1.68640000000000e-02)
#define h9X7_4 ( 2.67490000000000e-02)

/* W9X7 High-pass analysis filter */

#define g9X7_0 (-5.57543000000000e-01)
#define g9X7_1 ( 2.95636000000000e-01)
#define g9X7_2 ( 2.87720000000000e-02)
#define g9X7_3 (-4.56360000000000e-02)

/* W9X7 Lifting steps */
/* Updated by Margaret Lepley using exact equations in MS Excel.  Note change 
   in 5th decimal position on u2_9X7_0 and u2_9X7_1. */

#define p1_9X7_0 (-1.586134342)
#define p1_9X7_1 (-1.586134342)

#define u1_9X7_0 (-0.05298011857)
#define u1_9X7_1 (-0.05298011857)

#define p2_9X7_0 ( 0.8829110755)
#define p2_9X7_1 ( 0.8829110755)

#define u2_9X7_0 ( 0.4435068520)
#define u2_9X7_1 ( 0.4435068520)


/* W5X3 Low-pass analysis filter */

#define h5X3_0  0.75
#define h5X3_1 ( 0.25)
#define h5X3_2 (-0.125)

/* W5X3 High-pass analysis filter */

#define g5X3_0 ( 0.5)
#define g5X3_1 (-0.25)

/* W5X3 Lifting steps */

#define p1_5X3_rdx 1
#define p1_5X3_0  (-0.5)
#define p1_5X3_1  (-0.5)

#define u1_5X3_rdx 2
#define u1_5X3_0  ( 0.25)
#define u1_5X3_1  ( 0.25)

#endif /* HPLX_COEFFS_H */