Examples of jj2000.j2k.wavelet.synthesis.SynWTFilter

Package jj2000.j2k.wavelet.synthesis

Examples of jj2000.j2k.wavelet.synthesis.SynWTFilter

jj2000.j2k.wavelet.analysis.ForwardWT
This abstract class defines the methods of all synthesis wavelet filters. Specialized abstract classes that work on particular data types (int, float) provide more specific method calls while retaining the generality of this one. See the SynWTFilterInt and SynWTFilterFloat classes. Implementations of snythesis filters should inherit from one of those classes.
The length of the output signal is always the sum of the length of the low-pass and high-pass input signals.
All synthesis wavelet filters should follow the following conventions:
- The first sample of the output corresponds to the low-pass one. As a consequence, if the output signal is of odd-length then the low-pass input signal is one sample longer than the high-pass input one. Therefore, if the length of output signal is N, the low-pass input signal is of length N/2 if N is even and N/2+1/2 if N is odd, while the high-pass input signal is of length N/2 if N is even and N/2-1/2 if N is odd.
- The normalization of the analysis filters is 1 for the DC gain and 2 for the Nyquist gain (Type I normalization), for both reversible and non-reversible filters. The normalization of the synthesis filters should ensure prefect reconstruction according to this normalization of the analysis wavelet filters.
The synthetize method may seem very complicated, but is designed to minimize the amount of data copying and redundant calculations when used for block-based or line-based wavelet transform implementations, while being applicable to full-frame transforms as well. @see SynWTFilterInt @see SynWTFilterFloat


    /** Sets <code>componentTransformation</code> */
    // NOTE This requires filters having been set previously.
    public void setComponentTransformation(String values) {
        componentTransformation =
            new ForwCompTransfSpec(numTiles,
                                   numComponents,
                                   ModuleSpec.SPEC_TYPE_TILE,
                                   (AnWTFilterSpec)filters,
                                   this,
                                   values);

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     * constructor, to which warnings should be sent.
     */
    public J2KMetadata(ImageInputStream iis,
                       J2KImageReader reader) throws IOException {
        this();
        RandomAccessIO in = new IISRandomAccessIO(iis);


        iis.mark();
        // **** File Format ****
        // If the codestream is wrapped in the jp2 fileformat, Read the
        // file format wrapper

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        // Creates ForwardWT (forward wavelet transform)
        ForwardWT dwt = ForwardWT.createInstance(converter, j2kwparam);


        // Creates Quantizer
        Quantizer quant = Quantizer.createInstance(dwt,j2kwparam);


        // Creates ROIScaler
        ROIScaler rois = ROIScaler.createInstance(quant, j2kwparam);


        // Creates EntropyCoder

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        // Creates Quantizer
        Quantizer quant = Quantizer.createInstance(dwt,j2kwparam);


        // Creates ROIScaler
        ROIScaler rois = ROIScaler.createInstance(quant, j2kwparam);


        // Creates EntropyCoder
        EntropyCoder ecoder =
      EntropyCoder.createInstance(rois, j2kwparam,
    j2kwparam.getCodeBlockSize(),

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        // Tile-parts and packed packet headers
        int pktspertp = j2kwparam.getPacketPerTilePart();
        int ntiles = imgtiler.getNumTiles();
        if (pktspertp>0 || pphTile || pphMain){
            CodestreamManipulator cm =
                new CodestreamManipulator(tmpFile, ntiles, pktspertp,
                                          pphMain, pphTile, tempSop,
                                          tempEph);
            fileLength += cm.doCodestreamManipulation();
        }


        // File Format
        int nc= imgsrc.getNumComps() ;
        int[] bpc = new int[nc];

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  {
  }
  
  public void decode( String inputFileName, String outputFileName )
  {
    ParameterList defpl;
    String param;
    int i;


    // Get the dfault parameter values
    defpl = new ParameterList();
    for (i=pinfo.length-1; i>=0; i--) {
      if(pinfo[i][3]!=null)
        defpl.put(pinfo[i][0],pinfo[i][3]);
    }


    // Get all parameters from and put them in a parameter list
    pl = new ParameterList(defpl);
    for (i=0; i<pinfo.length; i++) {
      param = getParameter(pinfo[i][0]);
      if (param != null) {
        pl.put(pinfo[i][0],param);
      }

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  {
  }
  
  public void encode( String inputFileName, String outputFileName, boolean codeStreamOnly)
  {
    ParameterList defpl;
    String param;
    int i;


    // Get the dfault parameter values
    defpl = new ParameterList();
    for (i=pinfo.length-1; i>=0; i--) {
      if(pinfo[i][3]!=null)
        defpl.put(pinfo[i][0],pinfo[i][3]);
    }


    // Get all parameters from and put them in a parameter list
    pl = new ParameterList(defpl);
    for (i=0; i<pinfo.length; i++) {
      param = getParameter(pinfo[i][0]);
      if (param != null) {
        pl.put(pinfo[i][0],param);
      }

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  if (J2KImageWriteParam.FILTER_97.equals(values))
      setQuantizationType ("expounded");
  else
      setQuantizationType("reversible");


        filters = new AnWTFilterSpec(numTiles,
                                     numComponents,
                                     ModuleSpec.SPEC_TYPE_TILE_COMP,
                                     (QuantTypeSpec)quantizationType,
                                     this,
                                     values);

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        // Creates ImgDataConverter
        ImgDataConverter converter = new ImgDataConverter(fctransf);


        // Creates ForwardWT (forward wavelet transform)
        ForwardWT dwt = ForwardWT.createInstance(converter, j2kwparam);


        // Creates Quantizer
        Quantizer quant = Quantizer.createInstance(dwt,j2kwparam);


        // Creates ROIScaler

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