This class deals with the ROI functionality.

The ROI method is the Maxshift method. The ROIScaler works by scaling the quantized wavelet coefficients that do not affect the ROI (i.e background coefficients) so that these samples get a lower significance than the ROI ones. By scaling the coefficients sufficiently, the ROI coefficients can be recognized by their amplitude alone and no ROI mask needs to be generated at the decoder side.

The source module must be a quantizer and code-block's data is exchange with thanks to CBlkWTData instances.

Наследование: CSJ2K.j2k.image.ImgDataAdapter, CBlkQuantDataSrcEnc
Документация по классу ROIScaler
Пример #1
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        /// <summary> Initializes the header writer with the references to the coding chain.
        /// 
        /// </summary>
        /// <param name="origsrc">The original image data (before any component mixing,
        /// tiling, etc.)
        /// 
        /// </param>
        /// <param name="isorigsig">An array specifying for each component if it was
        /// originally signed or not.
        /// 
        /// </param>
        /// <param name="dwt">The discrete wavelet transform module.
        /// 
        /// </param>
        /// <param name="tiler">The tiler module.
        /// 
        /// </param>
        /// <param name="encSpec">The encoder specifications
        /// 
        /// </param>
        /// <param name="roiSc">The ROI scaler module.
        /// 
        /// </param>
        /// <param name="ralloc">The post compression rate allocator.
        /// 
        /// </param>
        /// <param name="pl">ParameterList instance.
        /// 
        /// </param>
        public HeaderEncoder(ImgData origsrc, bool[] isorigsig, ForwardWT dwt, Tiler tiler, EncoderSpecs encSpec, ROIScaler roiSc, PostCompRateAllocator ralloc, ParameterList pl)
        {
            pl.checkList(OPT_PREFIX, CSJ2K.j2k.util.ParameterList.toNameArray(pinfo));
            if (origsrc.NumComps != isorigsig.Length)
            {
                throw new System.ArgumentException();
            }
            this.origSrc = origsrc;
            this.isOrigSig = isorigsig;
            this.dwt = dwt;
            this.tiler = tiler;
            this.encSpec = encSpec;
            this.roiSc = roiSc;
            this.ralloc = ralloc;

            baos = new System.IO.MemoryStream();
            //UPGRADE_TODO: Class 'java.io.DataOutputStream' was converted to 'System.IO.BinaryWriter' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioDataOutputStream'"
            hbuf = new CSJ2K.Util.EndianBinaryWriter(baos, true);
            nComp = origsrc.NumComps;
            enJJ2KMarkSeg = pl.getBooleanParameter("Hjj2000_COM");
            otherCOMMarkSeg = pl.getParameter("HCOM");
        }