eff1ff4b41
* Fixed a typo in OpenJPEG.J2KLayerInfo (only affected debug display) git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@3118 52acb1d6-8a22-11de-b505-999d5b087335
312 lines
9.8 KiB
C#
312 lines
9.8 KiB
C#
/*
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* CVS identifier:
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*
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* $Id: SubbandSyn.java,v 1.25 2001/07/26 08:54:59 grosbois Exp $
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*
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* Class: SubbandSyn
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*
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* Description: Element for a tree structure for a description
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* of subband for the synthesis side.
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*
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*
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*
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* COPYRIGHT:
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*
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* This software module was originally developed by Raphaël Grosbois and
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* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
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* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
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* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
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* Centre France S.A) in the course of development of the JPEG2000
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* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
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* software module is an implementation of a part of the JPEG 2000
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* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
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* Systems AB and Canon Research Centre France S.A (collectively JJ2000
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* Partners) agree not to assert against ISO/IEC and users of the JPEG
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* 2000 Standard (Users) any of their rights under the copyright, not
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* including other intellectual property rights, for this software module
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* with respect to the usage by ISO/IEC and Users of this software module
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* or modifications thereof for use in hardware or software products
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* claiming conformance to the JPEG 2000 Standard. Those intending to use
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* this software module in hardware or software products are advised that
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* their use may infringe existing patents. The original developers of
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* this software module, JJ2000 Partners and ISO/IEC assume no liability
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* for use of this software module or modifications thereof. No license
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* or right to this software module is granted for non JPEG 2000 Standard
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* conforming products. JJ2000 Partners have full right to use this
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* software module for his/her own purpose, assign or donate this
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* software module to any third party and to inhibit third parties from
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* using this software module for non JPEG 2000 Standard conforming
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* products. This copyright notice must be included in all copies or
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* derivative works of this software module.
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*
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* Copyright (c) 1999/2000 JJ2000 Partners.
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* */
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using System;
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using CSJ2K.j2k.wavelet;
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namespace CSJ2K.j2k.wavelet.synthesis
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{
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/// <summary> This class represents a subband in a tree structure that describes the
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/// subband decomposition for a wavelet transform, specifically for the
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/// syhthesis side.
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///
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/// <p>The element can be either a node or a leaf of the tree. If it is a node
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/// then ther are 4 descendants (LL, HL, LH and HH). If it is a leaf there are
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/// no descendants.</p>
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///
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/// <p>The tree is bidirectional. Each element in the tree structure has a
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/// "parent", which is the subband from which the element was obtained by
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/// decomposition. The only exception is the root element which has no parent
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/// (i.e.it's null), for obvious reasons.</p>
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///
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/// </summary>
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public class SubbandSyn:Subband
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{
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/// <summary> Returns the parent of this subband. The parent of a subband is the
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/// subband from which this one was obtained by decomposition. The root
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/// element has no parent subband (null).
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///
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/// </summary>
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/// <returns> The parent subband, or null for the root one.
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///
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/// </returns>
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override public Subband Parent
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{
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get
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{
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return parent;
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}
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}
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/// <summary> Returns the LL child subband of this subband.
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///
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/// </summary>
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/// <returns> The LL child subband, or null if there are no childs.
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///
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/// </returns>
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override public Subband LL
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{
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get
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{
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return subb_LL;
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}
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}
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/// <summary> Returns the HL (horizontal high-pass) child subband of this subband.
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///
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/// </summary>
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/// <returns> The HL child subband, or null if there are no childs.
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///
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/// </returns>
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override public Subband HL
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{
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get
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{
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return subb_HL;
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}
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}
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/// <summary> Returns the LH (vertical high-pass) child subband of this subband.
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///
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/// </summary>
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/// <returns> The LH child subband, or null if there are no childs.
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///
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/// </returns>
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override public Subband LH
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{
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get
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{
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return subb_LH;
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}
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}
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/// <summary> Returns the HH child subband of this subband.
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///
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/// </summary>
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/// <returns> The HH child subband, or null if there are no childs.
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///
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/// </returns>
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override public Subband HH
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{
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get
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{
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return subb_HH;
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}
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}
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/// <summary> This function returns the horizontal wavelet filter relevant to this
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/// subband
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///
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/// </summary>
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/// <returns> The horizontal wavelet filter
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///
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/// </returns>
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override public WaveletFilter HorWFilter
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{
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get
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{
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return hFilter;
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}
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}
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/// <summary> This function returns the vertical wavelet filter relevant to this
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/// subband
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///
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/// </summary>
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/// <returns> The vertical wavelet filter
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///
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/// </returns>
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override public WaveletFilter VerWFilter
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{
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get
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{
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return hFilter;
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}
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}
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/// <summary>The reference to the parent of this subband. It is null for the root
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/// element. It is null by default.
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/// </summary>
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private SubbandSyn parent;
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/// <summary>The reference to the LL subband resulting from the decomposition of
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/// this subband. It is null by default.
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/// </summary>
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private SubbandSyn subb_LL;
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/// <summary>The reference to the HL subband (horizontal high-pass) resulting from
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/// the decomposition of this subband. It is null by default.
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/// </summary>
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private SubbandSyn subb_HL;
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/// <summary>The reference to the LH subband (vertical high-pass) resulting from
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/// the decomposition of this subband. It is null by default.
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///
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/// </summary>
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private SubbandSyn subb_LH;
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/// <summary>The reference to the HH subband resulting from the decomposition of
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/// this subband. It is null by default.
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/// </summary>
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private SubbandSyn subb_HH;
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/// <summary>The horizontal analysis filter used to recompose this subband, from
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/// its childs. This is applicable to "node" elements only. The default
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/// value is null.
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/// </summary>
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public SynWTFilter hFilter;
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/// <summary>The vertical analysis filter used to decompose this subband, from its
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/// childs. This is applicable to "node" elements only. The default value
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/// is null.
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/// </summary>
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public SynWTFilter vFilter;
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/// <summary>The number of magnitude bits </summary>
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public int magbits = 0;
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/// <summary> Creates a SubbandSyn element with all the default values. The
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/// dimensions are (0,0) and the upper left corner is (0,0).
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///
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/// </summary>
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public SubbandSyn()
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{
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}
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/// <summary> Creates the top-level node and the entire subband tree, with the
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/// top-level dimensions, the number of decompositions, and the
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/// decomposition tree as specified.
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///
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/// <p>This constructor just calls the same constructor of the super
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/// class.</p>
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///
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/// </summary>
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/// <param name="w">The top-level width
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///
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/// </param>
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/// <param name="h">The top-level height
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///
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/// </param>
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/// <param name="ulcx">The horizontal coordinate of the upper-left corner with
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/// respect to the canvas origin, in the component grid.
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///
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/// </param>
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/// <param name="ulcy">The vertical coordinate of the upper-left corner with
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/// respect to the canvas origin, in the component grid.
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///
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/// </param>
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/// <param name="lvls">The number of levels (or LL decompositions) in the tree.
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///
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/// </param>
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/// <param name="hfilters">The horizontal wavelet synthesis filters for each
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/// resolution level, starting at resolution level 0.
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///
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/// </param>
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/// <param name="vfilters">The vertical wavelet synthesis filters for each
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/// resolution level, starting at resolution level 0.
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///
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/// </param>
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/// <seealso cref="Subband.Subband(int,int,int,int,int,">
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/// WaveletFilter[],WaveletFilter[])
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///
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/// </seealso>
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public SubbandSyn(int w, int h, int ulcx, int ulcy, int lvls, WaveletFilter[] hfilters, WaveletFilter[] vfilters):base(w, h, ulcx, ulcy, lvls, hfilters, vfilters)
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{
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}
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/// <summary> Splits the current subband in its four subbands. It changes the status
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/// of this element (from a leaf to a node, and sets the filters), creates
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/// the childs and initializes them. An IllegalArgumentException is thrown
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/// if this subband is not a leaf.
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///
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/// <p>It uses the initChilds() method to initialize the childs.</p>
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///
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/// </summary>
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/// <param name="hfilter">The horizontal wavelet filter used to decompose this
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/// subband. It has to be a SynWTFilter object.
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///
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/// </param>
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/// <param name="vfilter">The vertical wavelet filter used to decompose this
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/// subband. It has to be a SynWTFilter object.
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///
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/// </param>
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/// <returns> A reference to the LL leaf (subb_LL).
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///
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/// </returns>
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/// <seealso cref="Subband.initChilds">
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///
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/// </seealso>
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protected internal override Subband split(WaveletFilter hfilter, WaveletFilter vfilter)
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{
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// Test that this is a node
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if (isNode)
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{
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throw new System.ArgumentException();
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}
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// Modify this element into a node and set the filters
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isNode = true;
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this.hFilter = (SynWTFilter) hfilter;
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this.vFilter = (SynWTFilter) vfilter;
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// Create childs
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subb_LL = new SubbandSyn();
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subb_LH = new SubbandSyn();
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subb_HL = new SubbandSyn();
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subb_HH = new SubbandSyn();
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// Assign parent
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subb_LL.parent = this;
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subb_HL.parent = this;
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subb_LH.parent = this;
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subb_HH.parent = this;
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// Initialize childs
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initChilds();
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// Return reference to LL subband
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return subb_LL;
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}
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}
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} |