001: /*
002: * $RCSfile: InverseWT.java,v $
003: * $Revision: 1.1 $
004: * $Date: 2005/02/11 05:02:32 $
005: * $State: Exp $
006: *
007: * Class: InverseWT
008: *
009: * Description: This interface defines the specifics
010: * of inverse wavelet transforms.
011: *
012: *
013: *
014: * COPYRIGHT:
015: *
016: * This software module was originally developed by Raphaël Grosbois and
017: * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
018: * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
019: * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
020: * Centre France S.A) in the course of development of the JPEG2000
021: * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
022: * software module is an implementation of a part of the JPEG 2000
023: * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
024: * Systems AB and Canon Research Centre France S.A (collectively JJ2000
025: * Partners) agree not to assert against ISO/IEC and users of the JPEG
026: * 2000 Standard (Users) any of their rights under the copyright, not
027: * including other intellectual property rights, for this software module
028: * with respect to the usage by ISO/IEC and Users of this software module
029: * or modifications thereof for use in hardware or software products
030: * claiming conformance to the JPEG 2000 Standard. Those intending to use
031: * this software module in hardware or software products are advised that
032: * their use may infringe existing patents. The original developers of
033: * this software module, JJ2000 Partners and ISO/IEC assume no liability
034: * for use of this software module or modifications thereof. No license
035: * or right to this software module is granted for non JPEG 2000 Standard
036: * conforming products. JJ2000 Partners have full right to use this
037: * software module for his/her own purpose, assign or donate this
038: * software module to any third party and to inhibit third parties from
039: * using this software module for non JPEG 2000 Standard conforming
040: * products. This copyright notice must be included in all copies or
041: * derivative works of this software module.
042: *
043: * Copyright (c) 1999/2000 JJ2000 Partners.
044: *
045: *
046: *
047: */
048: package jj2000.j2k.wavelet.synthesis;
049:
050: import jj2000.j2k.quantization.dequantizer.*;
051: import jj2000.j2k.wavelet.*;
052: import jj2000.j2k.decoder.*;
053: import jj2000.j2k.image.*;
054: import jj2000.j2k.util.*;
055: import jj2000.j2k.*;
056:
057: /**
058: * This abstract class extends the WaveletTransform one with the specifics of
059: * inverse wavelet transforms.
060: *
061: * <P>The image can be reconstructed at different resolution levels. This is
062: * controlled by the setResLevel() method. All the image, tile and component
063: * dimensions are relative the the resolution level being used. The number of
064: * resolution levels indicates the number of wavelet recompositions that will
065: * be used, if it is equal as the number of decomposition levels then the full
066: * resolution image is reconstructed.
067: *
068: * <P>It is assumed in this class that all tiles and components the same
069: * reconstruction resolution level. If that where not the case the
070: * implementing class should have additional data structures to store those
071: * values for each tile. However, the 'recResLvl' member variable always
072: * contain the values applicable to the current tile, since many methods
073: * implemented here rely on them.
074: * */
075: public abstract class InverseWT extends InvWTAdapter implements
076: BlkImgDataSrc {
077:
078: /**
079: * Initializes this object with the given source of wavelet
080: * coefficients. It initializes the resolution level for full resolutioin
081: * reconstruction (i.e. the maximum resolution available from the 'src'
082: * source).
083: *
084: * <P>It is assumed here that all tiles and components have the same
085: * reconstruction resolution level. If that was not the case it should be
086: * the value for the current tile of the source.
087: *
088: * @param src from where the wavelet coefficinets should be obtained.
089: *
090: * @param decSpec The decoder specifications
091: * */
092: public InverseWT(MultiResImgData src, DecoderSpecs decSpec) {
093: super (src, decSpec);
094: }
095:
096: /**
097: * Creates an InverseWT object that works on the data type of the source,
098: * with the special additional parameters from the parameter
099: * list. Currently the parameter list is ignored since no special
100: * parameters can be specified for the inverse wavelet transform yet.
101: *
102: * @param src The source of data for the inverse wavelet
103: * transform.
104: *
105: * @param pl The parameter list containing parameters applicable to the
106: * inverse wavelet transform (other parameters can also be present).
107: * */
108: public static InverseWT createInstance(CBlkWTDataSrcDec src,
109: DecoderSpecs decSpec) {
110:
111: // full page wavelet transform
112: return new InvWTFull(src, decSpec);
113: }
114: }
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