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
515 lines
16 KiB
C#
515 lines
16 KiB
C#
/*
|
|
* CVS identifier:
|
|
*
|
|
* $Id: SubbandAn.java,v 1.30 2001/08/02 09:13:53 grosbois Exp $
|
|
*
|
|
* Class: SubbandAn
|
|
*
|
|
* Description: Element for a tree structure for a descripotion
|
|
* of subbands on the anslysis side.
|
|
*
|
|
*
|
|
*
|
|
* COPYRIGHT:
|
|
*
|
|
* This software module was originally developed by Raphaël Grosbois and
|
|
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
|
|
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
|
|
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
|
|
* Centre France S.A) in the course of development of the JPEG2000
|
|
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
|
|
* software module is an implementation of a part of the JPEG 2000
|
|
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
|
|
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
|
|
* Partners) agree not to assert against ISO/IEC and users of the JPEG
|
|
* 2000 Standard (Users) any of their rights under the copyright, not
|
|
* including other intellectual property rights, for this software module
|
|
* with respect to the usage by ISO/IEC and Users of this software module
|
|
* or modifications thereof for use in hardware or software products
|
|
* claiming conformance to the JPEG 2000 Standard. Those intending to use
|
|
* this software module in hardware or software products are advised that
|
|
* their use may infringe existing patents. The original developers of
|
|
* this software module, JJ2000 Partners and ISO/IEC assume no liability
|
|
* for use of this software module or modifications thereof. No license
|
|
* or right to this software module is granted for non JPEG 2000 Standard
|
|
* conforming products. JJ2000 Partners have full right to use this
|
|
* software module for his/her own purpose, assign or donate this
|
|
* software module to any third party and to inhibit third parties from
|
|
* using this software module for non JPEG 2000 Standard conforming
|
|
* products. This copyright notice must be included in all copies or
|
|
* derivative works of this software module.
|
|
*
|
|
* Copyright (c) 1999/2000 JJ2000 Partners.
|
|
* */
|
|
using System;
|
|
using CSJ2K.j2k.wavelet;
|
|
namespace CSJ2K.j2k.wavelet.analysis
|
|
{
|
|
|
|
/// <summary> This class represents a subband in a bidirectional tree structure that
|
|
/// describes the subband decomposition for a wavelet transform, specifically
|
|
/// for the analysis side.
|
|
///
|
|
/// <p>The element can be either a node or a leaf of the tree. If it is a node
|
|
/// then ther are 4 descendants (LL, HL, LH and HH). If it is a leaf there are
|
|
/// no descendants.</p>
|
|
///
|
|
/// <p>The tree is bidirectional. Each element in the tree structure has a
|
|
/// "parent", which is the subband from which the element was obtained by
|
|
/// decomposition. The only exception is the root element which has no parent
|
|
/// (i.e.it's null), for obvious reasons.</p>
|
|
///
|
|
/// </summary>
|
|
public class SubbandAn:Subband
|
|
{
|
|
/// <summary> Returns the parent of this subband. The parent of a subband is the
|
|
/// subband from which this one was obtained by decomposition. The root
|
|
/// element has no parent subband (null).
|
|
///
|
|
/// </summary>
|
|
/// <returns> The parent subband, or null for the root one.
|
|
///
|
|
/// </returns>
|
|
override public Subband Parent
|
|
{
|
|
get
|
|
{
|
|
return parentband;
|
|
}
|
|
|
|
}
|
|
/// <summary> Returns the LL child subband of this subband.
|
|
///
|
|
/// </summary>
|
|
/// <returns> The LL child subband, or null if there are no childs.
|
|
///
|
|
/// </returns>
|
|
override public Subband LL
|
|
{
|
|
get
|
|
{
|
|
return subb_LL;
|
|
}
|
|
|
|
}
|
|
/// <summary> Returns the HL (horizontal high-pass) child subband of this subband.
|
|
///
|
|
/// </summary>
|
|
/// <returns> The HL child subband, or null if there are no childs.
|
|
///
|
|
/// </returns>
|
|
override public Subband HL
|
|
{
|
|
get
|
|
{
|
|
return subb_HL;
|
|
}
|
|
|
|
}
|
|
/// <summary> Returns the LH (vertical high-pass) child subband of this subband.
|
|
///
|
|
/// </summary>
|
|
/// <returns> The LH child subband, or null if there are no childs.
|
|
///
|
|
/// </returns>
|
|
override public Subband LH
|
|
{
|
|
get
|
|
{
|
|
return subb_LH;
|
|
}
|
|
|
|
}
|
|
/// <summary> Returns the HH child subband of this subband.
|
|
///
|
|
/// </summary>
|
|
/// <returns> The HH child subband, or null if there are no childs.
|
|
///
|
|
/// </returns>
|
|
override public Subband HH
|
|
{
|
|
get
|
|
{
|
|
return subb_HH;
|
|
}
|
|
|
|
}
|
|
/// <summary> This function returns the horizontal wavelet filter relevant to this
|
|
/// subband
|
|
///
|
|
/// </summary>
|
|
/// <returns> The horizontal wavelet filter
|
|
///
|
|
/// </returns>
|
|
override public WaveletFilter HorWFilter
|
|
{
|
|
get
|
|
{
|
|
return hFilter;
|
|
}
|
|
|
|
}
|
|
/// <summary> This function returns the vertical wavelet filter relevant to this
|
|
/// subband
|
|
///
|
|
/// </summary>
|
|
/// <returns> The vertical wavelet filter
|
|
///
|
|
/// </returns>
|
|
override public WaveletFilter VerWFilter
|
|
{
|
|
get
|
|
{
|
|
return hFilter;
|
|
}
|
|
|
|
}
|
|
|
|
/// <summary>The reference to the parent of this subband. It is null for the root
|
|
/// element. It is null by default.
|
|
/// </summary>
|
|
public SubbandAn parentband = null;
|
|
|
|
/// <summary>The reference to the LL subband resulting from the decomposition of
|
|
/// this subband. It is null by default.
|
|
/// </summary>
|
|
public SubbandAn subb_LL;
|
|
|
|
/// <summary>The reference to the HL subband (horizontal high-pass) resulting from
|
|
/// the decomposition of this subband. It is null by default.
|
|
/// </summary>
|
|
public SubbandAn subb_HL;
|
|
|
|
/// <summary>The reference to the LH subband (vertical high-pass) resulting from
|
|
/// the decomposition of this subband. It is null by default.
|
|
///
|
|
/// </summary>
|
|
public SubbandAn subb_LH;
|
|
|
|
/// <summary>The reference to the HH subband resulting from the decomposition of
|
|
/// this subband. It is null by default.
|
|
/// </summary>
|
|
public SubbandAn subb_HH;
|
|
|
|
/// <summary>The horizontal analysis filter used to decompose this subband. This is
|
|
/// applicable to "node" elements only. The default value is null.
|
|
/// </summary>
|
|
public AnWTFilter hFilter;
|
|
|
|
/// <summary>The vertical analysis filter used to decompose this subband. This is
|
|
/// applicable to "node" elements only. The default value is null.
|
|
/// </summary>
|
|
public AnWTFilter vFilter;
|
|
|
|
/// <summary>The L2-norm of the synthesis basis waveform of this subband,
|
|
/// applicable to "leafs" only. By default it is -1 (i.e. not calculated
|
|
/// yet).
|
|
///
|
|
/// </summary>
|
|
public float l2Norm = - 1.0f;
|
|
|
|
/// <summary> The contribution to the MSE or WMSE error that would result in the
|
|
/// image if there was an error of exactly one quantization step size in
|
|
/// the sample of the subband. This value is expressed relative to a
|
|
/// nominal dynamic range in the image domain of exactly 1.0. This field
|
|
/// contains valid data only after quantization 9See Quantizer).
|
|
///
|
|
/// </summary>
|
|
/// <seealso cref="jj2000.j2k.quantization.quantizer.Quantizer">
|
|
///
|
|
/// </seealso>
|
|
public float stepWMSE;
|
|
|
|
/// <summary> Creates a SubbandAn element with all the default values. The dimensions
|
|
/// are (0,0) and the upper left corner is (0,0).
|
|
///
|
|
/// </summary>
|
|
public SubbandAn()
|
|
{
|
|
}
|
|
|
|
/// <summary> Creates the top-level node and the entire subband tree, with the
|
|
/// top-level dimensions, the number of decompositions, and the
|
|
/// decomposition tree as specified.
|
|
///
|
|
/// <p>This constructor just calls the same constructor of the super class,
|
|
/// and then calculates the L2-norm (or energy weight) of each leaf.</p>
|
|
///
|
|
/// <p>This constructor does not initialize the value of the magBits or
|
|
/// stepWMSE member variables. This variables are normally initialized by
|
|
/// the quantizer (see Quantizer).</p>
|
|
///
|
|
/// </summary>
|
|
/// <param name="w">The top-level width
|
|
///
|
|
/// </param>
|
|
/// <param name="h">The top-level height
|
|
///
|
|
/// </param>
|
|
/// <param name="ulcx">The horizontal coordinate of the upper-left corner with
|
|
/// respect to the canvas origin, in the component grid.
|
|
///
|
|
/// </param>
|
|
/// <param name="ulcy">The vertical coordinate of the upper-left corner with
|
|
/// respect to the canvas origin, in the component grid.
|
|
///
|
|
/// </param>
|
|
/// <param name="lvls">The number of levels (or LL decompositions) in the tree.
|
|
///
|
|
/// </param>
|
|
/// <param name="hfilters">The horizontal wavelet analysis filters for each
|
|
/// resolution level, starting at resolution level 0.
|
|
///
|
|
/// </param>
|
|
/// <param name="vfilters">The vertical wavelet analysis filters for each
|
|
/// resolution level, starting at resolution level 0.
|
|
///
|
|
/// </param>
|
|
/// <seealso cref="Subband.Subband(int,int,int,int,int,">
|
|
/// WaveletFilter[],WaveletFilter[])
|
|
///
|
|
/// </seealso>
|
|
/// <seealso cref="jj2000.j2k.quantization.quantizer.Quantizer">
|
|
///
|
|
/// </seealso>
|
|
public SubbandAn(int w, int h, int ulcx, int ulcy, int lvls, WaveletFilter[] hfilters, WaveletFilter[] vfilters):base(w, h, ulcx, ulcy, lvls, hfilters, vfilters)
|
|
{
|
|
// Caculate the L2-norms
|
|
calcL2Norms();
|
|
}
|
|
|
|
/// <summary> Splits the current subband in its four subbands. It changes the status
|
|
/// of this element (from a leaf to a node, and sets the filters), creates
|
|
/// the childs and initializes them. An IllegalArgumentException is thrown
|
|
/// if this subband is not a leaf.
|
|
///
|
|
/// <p>It uses the initChilds() method to initialize the childs.</p>
|
|
///
|
|
/// </summary>
|
|
/// <param name="hfilter">The horizontal wavelet filter used to decompose this
|
|
/// subband. It has to be a AnWTFilter object.
|
|
///
|
|
/// </param>
|
|
/// <param name="vfilter">The vertical wavelet filter used to decompose this
|
|
/// subband. It has to be a AnWTFilter object.
|
|
///
|
|
/// </param>
|
|
/// <returns> A reference to the LL leaf (subb_LL).
|
|
///
|
|
/// </returns>
|
|
/// <seealso cref="Subband.initChilds">
|
|
///
|
|
/// </seealso>
|
|
protected internal override Subband split(WaveletFilter hfilter, WaveletFilter vfilter)
|
|
{
|
|
// Test that this is a node
|
|
if (isNode)
|
|
{
|
|
throw new System.ArgumentException();
|
|
}
|
|
|
|
// Modify this element into a node and set the filters
|
|
isNode = true;
|
|
this.hFilter = (AnWTFilter) hfilter;
|
|
this.vFilter = (AnWTFilter) vfilter;
|
|
|
|
// Create childs
|
|
subb_LL = new SubbandAn();
|
|
subb_LH = new SubbandAn();
|
|
subb_HL = new SubbandAn();
|
|
subb_HH = new SubbandAn();
|
|
|
|
// Assign parent
|
|
subb_LL.parentband = this;
|
|
subb_HL.parentband = this;
|
|
subb_LH.parentband = this;
|
|
subb_HH.parentband = this;
|
|
|
|
// Initialize childs
|
|
initChilds();
|
|
|
|
// Return reference to LL subband
|
|
return subb_LL;
|
|
}
|
|
|
|
/// <summary> Calculates the basis waveform of the first leaf for which the L2-norm
|
|
/// has not been calculated yet. This method searches recursively for the
|
|
/// first leaf for which the value has not been calculated yet, and then
|
|
/// calculates the L2-norm on the return path.
|
|
///
|
|
/// <p>The wfs argument should be a size 2 array of float arrays (i.e. 2D
|
|
/// array) and it must be of length 2 (or more). When returning, wfs[0]
|
|
/// will contain the line waveform, and wfs[1] will contain the column
|
|
/// waveform.</p>
|
|
///
|
|
/// <p>This method can not be called on an element that ahs a non-negative
|
|
/// value in l2Norm, since that means that we are done.</p>
|
|
///
|
|
/// </summary>
|
|
/// <param name="wfs">An size 2 array where the line and column waveforms will be
|
|
/// returned.
|
|
///
|
|
/// </param>
|
|
private void calcBasisWaveForms(float[][] wfs)
|
|
{
|
|
if (l2Norm < 0)
|
|
{
|
|
// We are not finished with this element yet
|
|
if (isNode)
|
|
{
|
|
// We are on a node => search on childs
|
|
if (subb_LL.l2Norm < 0f)
|
|
{
|
|
subb_LL.calcBasisWaveForms(wfs);
|
|
wfs[0] = hFilter.getLPSynWaveForm(wfs[0], null);
|
|
wfs[1] = vFilter.getLPSynWaveForm(wfs[1], null);
|
|
}
|
|
else if (subb_HL.l2Norm < 0f)
|
|
{
|
|
subb_HL.calcBasisWaveForms(wfs);
|
|
wfs[0] = hFilter.getHPSynWaveForm(wfs[0], null);
|
|
wfs[1] = vFilter.getLPSynWaveForm(wfs[1], null);
|
|
}
|
|
else if (subb_LH.l2Norm < 0f)
|
|
{
|
|
subb_LH.calcBasisWaveForms(wfs);
|
|
wfs[0] = hFilter.getLPSynWaveForm(wfs[0], null);
|
|
wfs[1] = vFilter.getHPSynWaveForm(wfs[1], null);
|
|
}
|
|
else if (subb_HH.l2Norm < 0f)
|
|
{
|
|
subb_HH.calcBasisWaveForms(wfs);
|
|
wfs[0] = hFilter.getHPSynWaveForm(wfs[0], null);
|
|
wfs[1] = vFilter.getHPSynWaveForm(wfs[1], null);
|
|
}
|
|
else
|
|
{
|
|
// There is an error! If all childs have non-negative
|
|
// l2norm, then this node should have non-negative l2norm
|
|
throw new System.ApplicationException("You have found a bug in JJ2000!");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This is a leaf, just use diracs (null is equivalent to
|
|
// dirac)
|
|
wfs[0] = new float[1];
|
|
wfs[0][0] = 1.0f;
|
|
wfs[1] = new float[1];
|
|
wfs[1][0] = 1.0f;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This is an error! The calcBasisWaveForms() method is never
|
|
// called on an element with non-negative l2norm
|
|
throw new System.ApplicationException("You have found a bug in JJ2000!");
|
|
}
|
|
}
|
|
|
|
/// <summary> Assigns the given L2-norm to the first leaf that does not have an
|
|
/// L2-norm value yet (i.e. l2norm is negative). The search is done
|
|
/// recursively and in the same order as that of the calcBasisWaveForms()
|
|
/// method, so that this method is used to assigne the l2norm of the
|
|
/// previously computed waveforms.
|
|
///
|
|
/// <p>This method can not be called on an element that ahs a non-negative
|
|
/// value in l2Norm, since that means that we are done.</p>
|
|
///
|
|
/// </summary>
|
|
/// <param name="l2n">The L2-norm to assign.
|
|
///
|
|
/// </param>
|
|
private void assignL2Norm(float l2n)
|
|
{
|
|
if (l2Norm < 0)
|
|
{
|
|
// We are not finished with this element yet
|
|
if (isNode)
|
|
{
|
|
// We are on a node => search on childs
|
|
if (subb_LL.l2Norm < 0f)
|
|
{
|
|
subb_LL.assignL2Norm(l2n);
|
|
}
|
|
else if (subb_HL.l2Norm < 0f)
|
|
{
|
|
subb_HL.assignL2Norm(l2n);
|
|
}
|
|
else if (subb_LH.l2Norm < 0f)
|
|
{
|
|
subb_LH.assignL2Norm(l2n);
|
|
}
|
|
else if (subb_HH.l2Norm < 0f)
|
|
{
|
|
subb_HH.assignL2Norm(l2n);
|
|
// If child now is done, we are done
|
|
if (subb_HH.l2Norm >= 0f)
|
|
{
|
|
l2Norm = 0f; // We are on a node, any non-neg value OK
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// There is an error! If all childs have non-negative
|
|
// l2norm, then this node should have non-negative l2norm
|
|
throw new System.ApplicationException("You have found a bug in JJ2000!");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This is a leaf, assign the L2-norm
|
|
l2Norm = l2n;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This is an error! The assignL2Norm() method is never called on
|
|
// an element with non-negative l2norm
|
|
throw new System.ApplicationException("You have found a bug in JJ2000!");
|
|
}
|
|
}
|
|
|
|
|
|
/// <summary> Calculates the L2-norm of the sythesis waveforms of every leaf in the
|
|
/// tree. This method should only be called on the root element.
|
|
///
|
|
/// </summary>
|
|
private void calcL2Norms()
|
|
{
|
|
int i;
|
|
float[][] wfs = new float[2][];
|
|
double acc;
|
|
float l2n;
|
|
|
|
// While we are not done on the root element, compute basis functions
|
|
// and assign L2-norm
|
|
while (l2Norm < 0f)
|
|
{
|
|
calcBasisWaveForms(wfs);
|
|
// Compute line L2-norm, which is the product of the line
|
|
// and column L2-norms
|
|
acc = 0.0;
|
|
for (i = wfs[0].Length - 1; i >= 0; i--)
|
|
{
|
|
acc += wfs[0][i] * wfs[0][i];
|
|
}
|
|
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
|
|
l2n = (float) System.Math.Sqrt(acc);
|
|
// Compute column L2-norm
|
|
acc = 0.0;
|
|
for (i = wfs[1].Length - 1; i >= 0; i--)
|
|
{
|
|
acc += wfs[1][i] * wfs[1][i];
|
|
}
|
|
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
|
|
l2n *= (float) System.Math.Sqrt(acc);
|
|
// Release waveforms
|
|
wfs[0] = null;
|
|
wfs[1] = null;
|
|
// Assign the value
|
|
assignL2Norm(l2n);
|
|
}
|
|
}
|
|
}
|
|
} |