Examples of jj2000.j2k.quantization.quantizer.CBlkQuantDataSrcEnc

Package jj2000.j2k.quantization.quantizer

Examples of jj2000.j2k.quantization.quantizer.CBlkQuantDataSrcEnc

jj2000.j2k.wavelet.analysis.ForwardWT
This interface defines a source of quantized wavelet coefficients and methods to transfer them in a code-block by code-block basis. In each call to 'getNextCodeBlock()' or 'getNextInternCodeBlock()' a new code-block is returned. The code-blocks are returned in no specific order.
This class is the source of data for the entropy coder. See the 'EntropyCoder' class.

Code-block data is returned in sign-magnitude representation, instead of the normal two's complement one. Only integral types are used. The sign magnitude representation is more adequate for entropy coding. In sign magnitude representation, the most significant bit is used for the sign (0 if positive, 1 if negative) and the magnitude of the coefficient is stored in the next M most significant bits. The rest of the bits (least significant bits) can contain a fractional value of the quantized coefficient. The number 'M' of magnitude bits is communicated in the 'magbits' member variable of the 'CBlkWTData'.

Note that no more of one object may request data, otherwise one object would get some of the data and another one another part, in no defined manner.
@see ForwWTDataProps @see CBlkWTDataSrc @see Quantizer @see EntropyCoder


    /** 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);

View Full Code Here


        // 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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