Examples of jj2000.j2k.quantization.quantizer.StdQuantizer

Package jj2000.j2k.quantization.quantizer

Examples of jj2000.j2k.quantization.quantizer.StdQuantizer

jj2000.j2k.wavelet.analysis.ForwardWT
This class implements scalar quantization of integer or floating-point valued source data. The source data is the wavelet transformed image data and the output is the quantized wavelet coefficients represented in sign-magnitude (see below).
Sign magnitude representation is used (instead of two's complement) for the output data. The most significant bit is used for the sign (0 if positive, 1 if negative). Then the magnitude of the quantized coefficient is stored in the next M most significat bits. The rest of the bits (least significant bits) can contain a fractional value of the quantized coefficient. This fractional value is not to be coded by the entropy coder. However, it can be used to compute rate-distortion measures with greater precision.
The value of M is determined for each subband as the sum of the number of guard bits G and the nominal range of quantized wavelet coefficients in the corresponding subband (Rq), minus 1:
M = G + Rq -1
The value of G should be the same for all subbands. The value of Rq depends on the quantization step size, the nominal range of the component before the wavelet transform and the analysis gain of the subband (see Subband).
The blocks of data that are requested should not cross subband boundaries. @see Subband @see Quantizer


    /** 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);

View Full Code Here

     * 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

View Full Code Here


        // 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

View Full Code Here


        // 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(),

View Full Code Here


        // 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];

View Full Code Here

  {
  }
  
  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);
      }

View Full Code Here

  {
  }
  
  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);
      }

View Full Code Here

  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

View Full Code Here

0 1 2

TOP

Related Classes of jj2000.j2k.quantization.quantizer.StdQuantizer

com.sun.media.imageioimpl.plugins.jpeg2000.BitsPerComponentBox

com.sun.media.imageioimpl.plugins.jpeg2000.Box

com.sun.media.imageioimpl.plugins.jpeg2000.ChannelDefinitionBox

com.sun.media.imageioimpl.plugins.jpeg2000.ColorSpecificationBox

com.sun.media.imageioimpl.plugins.jpeg2000.ComponentMappingBox

com.sun.media.imageioimpl.plugins.jpeg2000.DataEntryURLBox

com.sun.media.imageioimpl.plugins.jpeg2000.FileTypeBox

com.sun.media.imageioimpl.plugins.jpeg2000.HeaderBox

com.sun.media.imageioimpl.plugins.jpeg2000.J2KImageWriteParamJava

com.sun.media.imageioimpl.plugins.jpeg2000.J2KImageWriter

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.