/*
* CVS identifier:
*
* $Id: SubbandRectROIMask.java,v 1.3 2001/02/28 14:53:12 grosbois Exp $
*
* Class: ROI
*
* Description: This class describes the ROI mask for a subband
*
*
*
* 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.codestream.writer;
using CSJ2K.j2k.wavelet.analysis;
using CSJ2K.j2k.quantization;
using CSJ2K.j2k.wavelet;
using CSJ2K.j2k.image;
using CSJ2K.j2k.util;
using CSJ2K.j2k.roi;
namespace CSJ2K.j2k.roi.encoder
{
/// This class describes the ROI mask for a single subband. Each object of the
/// class contains the mask for a particular subband and also has references to
/// the masks of the children subbands of the subband corresponding to this
/// mask. This class describes subband masks for images containing only
/// rectangular ROIS
///
///
public class SubbandRectROIMask:SubbandROIMask
{
/// The upper left x coordinates of the applicable ROIs
public int[] ulxs;
/// The upper left y coordinates of the applicable ROIs
public int[] ulys;
/// The lower right x coordinates of the applicable ROIs
public int[] lrxs;
/// The lower right y coordinates of the applicable ROIs
public int[] lrys;
/// The constructor of the SubbandROIMask takes the dimensions of the
/// subband as parameters. A tree of masks is generated from the subband
/// sb. Each Subband contains the boundaries of each ROI.
///
///
/// The subband corresponding to this Subband Mask
///
///
/// The upper left x coordinates of the ROIs
///
///
/// The upper left y coordinates of the ROIs
///
///
/// The lower right x coordinates of the ROIs
///
///
/// The lower right y coordinates of the ROIs
///
///
/// The lower right y coordinates of the ROIs
///
///
/// Number of ROIs that affect this tile
///
///
public SubbandRectROIMask(Subband sb, int[] ulxs, int[] ulys, int[] lrxs, int[] lrys, int nr):base(sb.ulx, sb.uly, sb.w, sb.h)
{
this.ulxs = ulxs;
this.ulys = ulys;
this.lrxs = lrxs;
this.lrys = lrys;
int r;
if (sb.isNode)
{
isNode = true;
// determine odd/even - high/low filters
int horEvenLow = sb.ulcx % 2;
int verEvenLow = sb.ulcy % 2;
// Get filter support lengths
WaveletFilter hFilter = sb.HorWFilter;
WaveletFilter vFilter = sb.VerWFilter;
int hlnSup = hFilter.SynLowNegSupport;
int hhnSup = hFilter.SynHighNegSupport;
int hlpSup = hFilter.SynLowPosSupport;
int hhpSup = hFilter.SynHighPosSupport;
int vlnSup = vFilter.SynLowNegSupport;
int vhnSup = vFilter.SynHighNegSupport;
int vlpSup = vFilter.SynLowPosSupport;
int vhpSup = vFilter.SynHighPosSupport;
// Generate arrays for children
int x, y;
int[] lulxs = new int[nr];
int[] lulys = new int[nr];
int[] llrxs = new int[nr];
int[] llrys = new int[nr];
int[] hulxs = new int[nr];
int[] hulys = new int[nr];
int[] hlrxs = new int[nr];
int[] hlrys = new int[nr];
for (r = nr - 1; r >= 0; r--)
{
// For all ROI calculate ...
// Upper left x for all children
x = ulxs[r];
if (horEvenLow == 0)
{
lulxs[r] = (x + 1 - hlnSup) / 2;
hulxs[r] = (x - hhnSup) / 2;
}
else
{
lulxs[r] = (x - hlnSup) / 2;
hulxs[r] = (x + 1 - hhnSup) / 2;
}
// Upper left y for all children
y = ulys[r];
if (verEvenLow == 0)
{
lulys[r] = (y + 1 - vlnSup) / 2;
hulys[r] = (y - vhnSup) / 2;
}
else
{
lulys[r] = (y - vlnSup) / 2;
hulys[r] = (y + 1 - vhnSup) / 2;
}
// lower right x for all children
x = lrxs[r];
if (horEvenLow == 0)
{
llrxs[r] = (x + hlpSup) / 2;
hlrxs[r] = (x - 1 + hhpSup) / 2;
}
else
{
llrxs[r] = (x - 1 + hlpSup) / 2;
hlrxs[r] = (x + hhpSup) / 2;
}
// lower right y for all children
y = lrys[r];
if (verEvenLow == 0)
{
llrys[r] = (y + vlpSup) / 2;
hlrys[r] = (y - 1 + vhpSup) / 2;
}
else
{
llrys[r] = (y - 1 + vlpSup) / 2;
hlrys[r] = (y + vhpSup) / 2;
}
}
// Create children
hh = new SubbandRectROIMask(sb.HH, hulxs, hulys, hlrxs, hlrys, nr);
lh = new SubbandRectROIMask(sb.LH, lulxs, hulys, llrxs, hlrys, nr);
hl = new SubbandRectROIMask(sb.HL, hulxs, lulys, hlrxs, llrys, nr);
ll = new SubbandRectROIMask(sb.LL, lulxs, lulys, llrxs, llrys, nr);
}
}
}
}