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/*
* $RCSfile: SubbandRectROIMask.java,v $
* $Revision: 1.1 $
* $Date: 2005/02/11 05:02:24 $
* $State: 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.
* */
package jj2000.j2k.roi.encoder;
import jj2000.j2k.codestream.writer.*;
import jj2000.j2k.wavelet.analysis.*;
import jj2000.j2k.quantization.*;
import jj2000.j2k.wavelet.*;
import jj2000.j2k.image.*;
import jj2000.j2k.util.*;
import jj2000.j2k.roi.*;
/**
* 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 extends 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.
*
* @param sb The subband corresponding to this Subband Mask
*
* @param ulxs The upper left x coordinates of the ROIs
*
* @param ulys The upper left y coordinates of the ROIs
*
* @param lrxs The lower right x coordinates of the ROIs
*
* @param lrys The lower right y coordinates of the ROIs
*
* @param lrys The lower right y coordinates of the ROIs
*
* @param nr Number of ROIs that affect this tile
* */
public SubbandRectROIMask(Subband sb, int[] ulxs, int[] ulys, int[] lrxs,
int[] lrys, int nr){
super(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.getHorWFilter();
WaveletFilter vFilter = sb.getVerWFilter();
int hlnSup = hFilter.getSynLowNegSupport();
int hhnSup = hFilter.getSynHighNegSupport();
int hlpSup = hFilter.getSynLowPosSupport();
int hhpSup = hFilter.getSynHighPosSupport();
int vlnSup = vFilter.getSynLowNegSupport();
int vhnSup = vFilter.getSynHighNegSupport();
int vlpSup = vFilter.getSynLowPosSupport();
int vhpSup = vFilter.getSynHighPosSupport();
// 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.getHH(),hulxs,hulys,hlrxs,hlrys,nr);
lh = new SubbandRectROIMask(sb.getLH(),lulxs,hulys,llrxs,hlrys,nr);
hl = new SubbandRectROIMask(sb.getHL(),hulxs,lulys,hlrxs,llrys,nr);
ll = new SubbandRectROIMask(sb.getLL(),lulxs,lulys,llrxs,llrys,nr);
}
}
}