corrade-vassal – Blame information for rev 1
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1 | vero | 1 | /* |
2 | * CVS identifier: |
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3 | * |
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4 | * $Id: ROIMaskGenerator.java,v 1.2 2000/11/27 15:03:51 grosbois Exp $ |
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5 | * |
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6 | * Class: ROIMaskGenerator |
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7 | * |
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8 | * Description: This class describes generators of ROI masks |
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9 | * |
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10 | * |
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11 | * |
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12 | * COPYRIGHT: |
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13 | * |
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14 | * This software module was originally developed by Raphaël Grosbois and |
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15 | * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel |
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16 | * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David |
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17 | * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research |
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18 | * Centre France S.A) in the course of development of the JPEG2000 |
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19 | * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This |
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20 | * software module is an implementation of a part of the JPEG 2000 |
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21 | * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio |
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22 | * Systems AB and Canon Research Centre France S.A (collectively JJ2000 |
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23 | * Partners) agree not to assert against ISO/IEC and users of the JPEG |
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24 | * 2000 Standard (Users) any of their rights under the copyright, not |
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25 | * including other intellectual property rights, for this software module |
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26 | * with respect to the usage by ISO/IEC and Users of this software module |
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27 | * or modifications thereof for use in hardware or software products |
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28 | * claiming conformance to the JPEG 2000 Standard. Those intending to use |
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29 | * this software module in hardware or software products are advised that |
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30 | * their use may infringe existing patents. The original developers of |
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31 | * this software module, JJ2000 Partners and ISO/IEC assume no liability |
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32 | * for use of this software module or modifications thereof. No license |
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33 | * or right to this software module is granted for non JPEG 2000 Standard |
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34 | * conforming products. JJ2000 Partners have full right to use this |
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35 | * software module for his/her own purpose, assign or donate this |
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36 | * software module to any third party and to inhibit third parties from |
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37 | * using this software module for non JPEG 2000 Standard conforming |
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38 | * products. This copyright notice must be included in all copies or |
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39 | * derivative works of this software module. |
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40 | * |
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41 | * Copyright (c) 1999/2000 JJ2000 Partners. |
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42 | */ |
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43 | using System; |
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44 | using CSJ2K.j2k.image; |
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45 | using CSJ2K.j2k.quantization; |
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46 | using CSJ2K.j2k.wavelet; |
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47 | using CSJ2K.j2k.wavelet.analysis; |
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48 | using CSJ2K.j2k.codestream.writer; |
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49 | using CSJ2K.j2k.util; |
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50 | using CSJ2K.j2k.roi; |
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51 | namespace CSJ2K.j2k.roi.encoder |
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52 | { |
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53 | |||
54 | /// <summary> This class generates the ROI masks for the ROIScaler.It gives the scaler |
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55 | /// the ROI mask for the current code-block. |
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56 | /// |
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57 | /// <P>The values are calculated from the scaling factors of the ROIs. The |
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58 | /// values with which to scale are equal to u-umin where umin is the lowest |
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59 | /// scaling factor within the block. The umin value is sent to the entropy |
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60 | /// coder to be used for scaling the distortion values. |
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61 | /// |
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62 | /// </summary> |
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63 | /// <seealso cref="RectROIMaskGenerator"> |
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64 | /// |
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65 | /// </seealso> |
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66 | /// <seealso cref="ArbROIMaskGenerator"> |
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67 | /// |
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68 | /// </seealso> |
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69 | public abstract class ROIMaskGenerator |
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70 | { |
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71 | /// <summary> This function returns the ROIs in the image |
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72 | /// |
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73 | /// </summary> |
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74 | /// <returns> The ROIs in the image |
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75 | /// </returns> |
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76 | virtual public ROI[] ROIs |
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77 | { |
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78 | get |
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79 | { |
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80 | return roi_array; |
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81 | } |
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82 | |||
83 | } |
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84 | |||
85 | /// <summary>Array containing the ROIs </summary> |
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86 | protected internal ROI[] roi_array; |
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87 | |||
88 | /// <summary>Number of components </summary> |
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89 | protected internal int nrc; |
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90 | |||
91 | /// <summary>Flag indicating whether a mask has been made for the current tile </summary> |
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92 | protected internal bool[] tileMaskMade; |
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93 | |||
94 | /* Flag indicating whether there are any ROIs in this tile */ |
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95 | protected internal bool roiInTile; |
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96 | |||
97 | /// <summary> The constructor of the mask generator |
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98 | /// |
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99 | /// </summary> |
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100 | /// <param name="rois">The ROIs in the image |
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101 | /// |
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102 | /// </param> |
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103 | /// <param name="nrc">The number of components |
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104 | /// </param> |
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105 | public ROIMaskGenerator(ROI[] rois, int nrc) |
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106 | { |
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107 | this.roi_array = rois; |
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108 | this.nrc = nrc; |
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109 | tileMaskMade = new bool[nrc]; |
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110 | } |
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111 | |||
112 | /// <summary> This functions gets a DataBlk with the size of the current code-block |
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113 | /// and fills it with the ROI mask. The lowest scaling value in the mask |
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114 | /// for this code-block is returned by the function to be used for |
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115 | /// modifying the rate distortion estimations. |
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116 | /// |
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117 | /// </summary> |
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118 | /// <param name="db">The data block that is to be filled with the mask |
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119 | /// |
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120 | /// </param> |
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121 | /// <param name="sb">The root of the current subband tree |
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122 | /// |
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123 | /// </param> |
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124 | /// <param name="magbits">The number of magnitude bits in this code-block |
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125 | /// |
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126 | /// </param> |
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127 | /// <param name="c">Component number |
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128 | /// |
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129 | /// </param> |
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130 | /// <returns> Whether or not a mask was needed for this tile |
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131 | /// </returns> |
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132 | public abstract bool getROIMask(DataBlkInt db, Subband sb, int magbits, int c); |
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133 | |||
134 | /// <summary> This function generates the ROI mask for the entire tile. The mask is |
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135 | /// generated for one component. This method is called once for each tile |
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136 | /// and component. |
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137 | /// |
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138 | /// </summary> |
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139 | /// <param name="sb">The root of the subband tree used in the decomposition |
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140 | /// |
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141 | /// </param> |
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142 | /// <param name="magbits">The max number of magnitude bits in any code-block |
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143 | /// |
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144 | /// </param> |
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145 | /// <param name="n">component number |
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146 | /// </param> |
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147 | public abstract void makeMask(Subband sb, int magbits, int n); |
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148 | |||
149 | /// <summary> This function is called every time the tile is changed to indicate |
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150 | /// that there is need to make a new mask |
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151 | /// </summary> |
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152 | public virtual void tileChanged() |
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153 | { |
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154 | for (int i = 0; i < nrc; i++) |
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155 | tileMaskMade[i] = false; |
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156 | } |
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157 | } |
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158 | } |