Source Code Cross Referenced for SubbandRectROIMask.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » jj2000 » j2k » roi » encoder » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » jj2000.j2k.roi.encoder 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: SubbandRectROIMask.java,v $
003:         * $Revision: 1.1 $
004:         * $Date: 2005/02/11 05:02:24 $
005:         * $State: Exp $
006:         *
007:         * Class:                   ROI
008:         *
009:         * Description:             This class describes the ROI mask for a subband
010:         *
011:         *
012:         *
013:         * COPYRIGHT:
014:         *
015:         * This software module was originally developed by Raphaël Grosbois and
016:         * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
017:         * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
018:         * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
019:         * Centre France S.A) in the course of development of the JPEG2000
020:         * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
021:         * software module is an implementation of a part of the JPEG 2000
022:         * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
023:         * Systems AB and Canon Research Centre France S.A (collectively JJ2000
024:         * Partners) agree not to assert against ISO/IEC and users of the JPEG
025:         * 2000 Standard (Users) any of their rights under the copyright, not
026:         * including other intellectual property rights, for this software module
027:         * with respect to the usage by ISO/IEC and Users of this software module
028:         * or modifications thereof for use in hardware or software products
029:         * claiming conformance to the JPEG 2000 Standard. Those intending to use
030:         * this software module in hardware or software products are advised that
031:         * their use may infringe existing patents. The original developers of
032:         * this software module, JJ2000 Partners and ISO/IEC assume no liability
033:         * for use of this software module or modifications thereof. No license
034:         * or right to this software module is granted for non JPEG 2000 Standard
035:         * conforming products. JJ2000 Partners have full right to use this
036:         * software module for his/her own purpose, assign or donate this
037:         * software module to any third party and to inhibit third parties from
038:         * using this software module for non JPEG 2000 Standard conforming
039:         * products. This copyright notice must be included in all copies or
040:         * derivative works of this software module.
041:         *
042:         * Copyright (c) 1999/2000 JJ2000 Partners.
043:         * */
044:        package jj2000.j2k.roi.encoder;
045:
046:        import jj2000.j2k.codestream.writer.*;
047:        import jj2000.j2k.wavelet.analysis.*;
048:        import jj2000.j2k.quantization.*;
049:        import jj2000.j2k.wavelet.*;
050:        import jj2000.j2k.image.*;
051:        import jj2000.j2k.util.*;
052:        import jj2000.j2k.roi.*;
053:
054:        /**
055:         * This class describes the ROI mask for a single subband. Each object of the
056:         * class contains the mask for a particular subband and also has references to
057:         * the masks of the children subbands of the subband corresponding to this
058:         * mask. This class describes subband masks for images containing only
059:         * rectangular ROIS
060:         * */
061:        public class SubbandRectROIMask extends SubbandROIMask {
062:
063:            /** The upper left x coordinates of the applicable ROIs */
064:            public int[] ulxs;
065:
066:            /** The upper left y coordinates of the applicable ROIs */
067:            public int[] ulys;
068:
069:            /** The lower right x coordinates of the applicable ROIs */
070:            public int[] lrxs;
071:
072:            /** The lower right y coordinates of the applicable ROIs */
073:            public int[] lrys;
074:
075:            /**
076:             * The constructor of the SubbandROIMask takes the dimensions of the
077:             * subband as parameters. A tree of masks is generated from the subband
078:             * sb. Each Subband contains the boundaries of each ROI.
079:             *
080:             * @param sb The subband corresponding to this Subband Mask
081:             *
082:             * @param ulxs The upper left x coordinates of the ROIs
083:             *
084:             * @param ulys The upper left y coordinates of the ROIs
085:             *
086:             * @param lrxs The lower right x coordinates of the ROIs
087:             *
088:             * @param lrys The lower right y coordinates of the ROIs
089:             *
090:             * @param lrys The lower right y coordinates of the ROIs
091:             *
092:             * @param nr Number of ROIs that affect this tile
093:             * */
094:            public SubbandRectROIMask(Subband sb, int[] ulxs, int[] ulys,
095:                    int[] lrxs, int[] lrys, int nr) {
096:                super (sb.ulx, sb.uly, sb.w, sb.h);
097:                this .ulxs = ulxs;
098:                this .ulys = ulys;
099:                this .lrxs = lrxs;
100:                this .lrys = lrys;
101:                int r;
102:
103:                if (sb.isNode) {
104:                    isNode = true;
105:                    // determine odd/even - high/low filters
106:                    int horEvenLow = sb.ulcx % 2;
107:                    int verEvenLow = sb.ulcy % 2;
108:
109:                    // Get filter support lengths
110:                    WaveletFilter hFilter = sb.getHorWFilter();
111:                    WaveletFilter vFilter = sb.getVerWFilter();
112:                    int hlnSup = hFilter.getSynLowNegSupport();
113:                    int hhnSup = hFilter.getSynHighNegSupport();
114:                    int hlpSup = hFilter.getSynLowPosSupport();
115:                    int hhpSup = hFilter.getSynHighPosSupport();
116:                    int vlnSup = vFilter.getSynLowNegSupport();
117:                    int vhnSup = vFilter.getSynHighNegSupport();
118:                    int vlpSup = vFilter.getSynLowPosSupport();
119:                    int vhpSup = vFilter.getSynHighPosSupport();
120:
121:                    // Generate arrays for children
122:                    int x, y;
123:                    int[] lulxs = new int[nr];
124:                    int[] lulys = new int[nr];
125:                    int[] llrxs = new int[nr];
126:                    int[] llrys = new int[nr];
127:                    int[] hulxs = new int[nr];
128:                    int[] hulys = new int[nr];
129:                    int[] hlrxs = new int[nr];
130:                    int[] hlrys = new int[nr];
131:                    for (r = nr - 1; r >= 0; r--) { // For all ROI calculate ...
132:                        // Upper left x for all children
133:                        x = ulxs[r];
134:                        if (horEvenLow == 0) {
135:                            lulxs[r] = (x + 1 - hlnSup) / 2;
136:                            hulxs[r] = (x - hhnSup) / 2;
137:                        } else {
138:                            lulxs[r] = (x - hlnSup) / 2;
139:                            hulxs[r] = (x + 1 - hhnSup) / 2;
140:                        }
141:                        // Upper left y for all children
142:                        y = ulys[r];
143:                        if (verEvenLow == 0) {
144:                            lulys[r] = (y + 1 - vlnSup) / 2;
145:                            hulys[r] = (y - vhnSup) / 2;
146:                        } else {
147:                            lulys[r] = (y - vlnSup) / 2;
148:                            hulys[r] = (y + 1 - vhnSup) / 2;
149:                        }
150:                        // lower right x for all children
151:                        x = lrxs[r];
152:                        if (horEvenLow == 0) {
153:                            llrxs[r] = (x + hlpSup) / 2;
154:                            hlrxs[r] = (x - 1 + hhpSup) / 2;
155:                        } else {
156:                            llrxs[r] = (x - 1 + hlpSup) / 2;
157:                            hlrxs[r] = (x + hhpSup) / 2;
158:                        }
159:                        // lower right y for all children
160:                        y = lrys[r];
161:                        if (verEvenLow == 0) {
162:                            llrys[r] = (y + vlpSup) / 2;
163:                            hlrys[r] = (y - 1 + vhpSup) / 2;
164:                        } else {
165:                            llrys[r] = (y - 1 + vlpSup) / 2;
166:                            hlrys[r] = (y + vhpSup) / 2;
167:                        }
168:                    }
169:                    // Create children
170:                    hh = new SubbandRectROIMask(sb.getHH(), hulxs, hulys,
171:                            hlrxs, hlrys, nr);
172:                    lh = new SubbandRectROIMask(sb.getLH(), lulxs, hulys,
173:                            llrxs, hlrys, nr);
174:                    hl = new SubbandRectROIMask(sb.getHL(), hulxs, lulys,
175:                            hlrxs, llrys, nr);
176:                    ll = new SubbandRectROIMask(sb.getLL(), lulxs, lulys,
177:                            llrxs, llrys, nr);
178:
179:                }
180:            }
181:        }
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