Examples of jj2000.j2k.image.input.ImgReaderPGX

Package jj2000.j2k.image.input

Examples of jj2000.j2k.image.input.ImgReaderPGX

jj2000.j2k.wavelet.analysis.ForwardWT
This class extends the ImgReader abstract class for reading PGX files. PGX is a custom monochrome file format invented specifically to simplify the use of JPEG 2000 with images of different bit-depths in the range 1 to 31 bits per pixel.
The file consists of a one line text header followed by the data.

Header: "PG"+ ws +<endianess>+ ws +[sign]+ws + <bit-depth>+" "+<width>+" "+<height>+'\n'

where:
- ws (white-spaces) is any combination of characters ' ' and '\t'.
- endianess equals "LM" or "ML"(resp. little-endian or big-endian)
- sign equals "+" or "-" (resp. unsigned or signed). If omited, values are supposed to be unsigned.
- bit-depth that can be any number between 1 and 31.
- width and height are the image dimensions (in pixels).
Data: The image binary values appear one after the other (in raster order) immediately after the last header character ('\n') and are byte-aligned (they are packed into 1,2 or 4 bytes per sample, depending upon the bit-depth value).

If the data is unisigned, level shifting is applied subtracting 2^(bitdepth - 1)

Since it is not possible to know the input file byte-ordering before reading its header, this class can not be construct from a RandomAccessIO. So, the constructor has to open first the input file, to read only its header, and then it can create the appropriate BufferedRandomAccessFile (Big-Endian or Little-Endian byte-ordering).

NOTE: This class is not thread safe, for reasons of internal buffering.
@see jj2000.j2k.image.ImgData @see RandomAccessIO @see BufferedRandomAccessFile @see BEBufferedRandomAccessFile


    /** 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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