corrade-vassal – Rev 1
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/*
* CVS identifier:
*
* $Id: ROIMaskGenerator.java,v 1.2 2000/11/27 15:03:51 grosbois Exp $
*
* Class: ROIMaskGenerator
*
* Description: This class describes generators of ROI masks
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
*
* Copyright (c) 1999/2000 JJ2000 Partners.
*/
using System;
using CSJ2K.j2k.image;
using CSJ2K.j2k.quantization;
using CSJ2K.j2k.wavelet;
using CSJ2K.j2k.wavelet.analysis;
using CSJ2K.j2k.codestream.writer;
using CSJ2K.j2k.util;
using CSJ2K.j2k.roi;
namespace CSJ2K.j2k.roi.encoder
{
/// <summary> This class generates the ROI masks for the ROIScaler.It gives the scaler
/// the ROI mask for the current code-block.
///
/// <P>The values are calculated from the scaling factors of the ROIs. The
/// values with which to scale are equal to u-umin where umin is the lowest
/// scaling factor within the block. The umin value is sent to the entropy
/// coder to be used for scaling the distortion values.
///
/// </summary>
/// <seealso cref="RectROIMaskGenerator">
///
/// </seealso>
/// <seealso cref="ArbROIMaskGenerator">
///
/// </seealso>
public abstract class ROIMaskGenerator
{
/// <summary> This function returns the ROIs in the image
///
/// </summary>
/// <returns> The ROIs in the image
/// </returns>
virtual public ROI[] ROIs
{
get
{
return roi_array;
}
}
/// <summary>Array containing the ROIs </summary>
protected internal ROI[] roi_array;
/// <summary>Number of components </summary>
protected internal int nrc;
/// <summary>Flag indicating whether a mask has been made for the current tile </summary>
protected internal bool[] tileMaskMade;
/* Flag indicating whether there are any ROIs in this tile */
protected internal bool roiInTile;
/// <summary> The constructor of the mask generator
///
/// </summary>
/// <param name="rois">The ROIs in the image
///
/// </param>
/// <param name="nrc">The number of components
/// </param>
public ROIMaskGenerator(ROI[] rois, int nrc)
{
this.roi_array = rois;
this.nrc = nrc;
tileMaskMade = new bool[nrc];
}
/// <summary> This functions gets a DataBlk with the size of the current code-block
/// and fills it with the ROI mask. The lowest scaling value in the mask
/// for this code-block is returned by the function to be used for
/// modifying the rate distortion estimations.
///
/// </summary>
/// <param name="db">The data block that is to be filled with the mask
///
/// </param>
/// <param name="sb">The root of the current subband tree
///
/// </param>
/// <param name="magbits">The number of magnitude bits in this code-block
///
/// </param>
/// <param name="c">Component number
///
/// </param>
/// <returns> Whether or not a mask was needed for this tile
/// </returns>
public abstract bool getROIMask(DataBlkInt db, Subband sb, int magbits, int c);
/// <summary> This function generates the ROI mask for the entire tile. The mask is
/// generated for one component. This method is called once for each tile
/// and component.
///
/// </summary>
/// <param name="sb">The root of the subband tree used in the decomposition
///
/// </param>
/// <param name="magbits">The max number of magnitude bits in any code-block
///
/// </param>
/// <param name="n">component number
/// </param>
public abstract void makeMask(Subband sb, int magbits, int n);
/// <summary> This function is called every time the tile is changed to indicate
/// that there is need to make a new mask
/// </summary>
public virtual void tileChanged()
{
for (int i = 0; i < nrc; i++)
tileMaskMade[i] = false;
}
}
}
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