trunk/src/jp/nyatla/nyartoolkit/core/rasterfilter/rgb2gs/NyARRasterFilter_Rgb2Gs_RgbCube.java

   1 /* \r
   2  * PROJECT: NyARToolkit\r
   3  * --------------------------------------------------------------------------------\r
   4  * This work is based on the original ARToolKit developed by\r
   5  *   Hirokazu Kato\r
   6  *   Mark Billinghurst\r
   7  *   HITLab, University of Washington, Seattle\r
   8  * http://www.hitl.washington.edu/artoolkit/\r
   9  *\r
  10  * The NyARToolkit is Java edition ARToolKit class library.\r
  11  * Copyright (C)2008-2009 Ryo Iizuka\r
  12  *\r
  13  * This program is free software: you can redistribute it and/or modify\r
  14  * it under the terms of the GNU General Public License as published by\r
  15  * the Free Software Foundation, either version 3 of the License, or\r
  16  * (at your option) any later version.\r
  17  * \r
  18  * This program is distributed in the hope that it will be useful,\r
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  21  * GNU General Public License for more details.\r
  22  *\r
  23  * You should have received a copy of the GNU General Public License\r
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.\r
  25  * \r
  26  * For further information please contact.\r
  27  *      http://nyatla.jp/nyatoolkit/\r
  28  *      <airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>\r
  29  * \r
  30  */\r
  31 package jp.nyatla.nyartoolkit.core.rasterfilter.rgb2gs;\r
  32 \r
  33 import jp.nyatla.nyartoolkit.NyARException;\r
  34 import jp.nyatla.nyartoolkit.core.raster.*;\r
  35 import jp.nyatla.nyartoolkit.core.raster.rgb.INyARRgbRaster;\r
  36 import jp.nyatla.nyartoolkit.core.rasterfilter.rgb2gs.INyARRasterFilter_Rgb2Gs;\r
  37 import jp.nyatla.nyartoolkit.core.types.NyARIntSize;\r
  38 \r
  39 \r
  40 /**\r
  41  * RGBラスタをGrayScaleに変換するフィルタを作成します。\r
  42  * このフィルタは、RGB値の平均値を、(R*G*B)/(255*255)で算出します。\r
  43  * \r
  44  * この値は、RGB成分の作る立方体の体積を0-255スケールにした値です。\r
  45  *\r
  46  */\r
  47 public class NyARRasterFilter_Rgb2Gs_RgbCube implements INyARRasterFilter_Rgb2Gs\r
  48 {\r
  49         private IdoFilterImpl _dofilterimpl;\r
  50         public NyARRasterFilter_Rgb2Gs_RgbCube(int i_in_raster_type) throws NyARException\r
  51         {\r
  52                 if(!initInstance(i_in_raster_type,INyARRaster.BUFFERFORMAT_INT1D_GRAY_8))\r
  53                 {\r
  54                         throw new NyARException();\r
  55                 }\r
  56         }\r
  57         public NyARRasterFilter_Rgb2Gs_RgbCube(int i_in_raster_type,int i_out_raster) throws NyARException\r
  58         {\r
  59                 if(!initInstance(i_in_raster_type,i_out_raster))\r
  60                 {\r
  61                         throw new NyARException();\r
  62                 }\r
  63         }       \r
  64         protected boolean initInstance(int i_in_raster_type,int i_out_raster_type)\r
  65         {\r
  66                 switch(i_out_raster_type){\r
  67                 case INyARRaster.BUFFERFORMAT_INT1D_GRAY_8:\r
  68                         switch (i_in_raster_type) {\r
  69                         case INyARRaster.BUFFERFORMAT_BYTE1D_B8G8R8_24:\r
  70                         case INyARRaster.BUFFERFORMAT_BYTE1D_R8G8B8_24:\r
  71                                 this._dofilterimpl=new IdoFilterImpl_BYTE1D_B8G8R8_24();\r
  72                                 break;\r
  73                         default:\r
  74                                 return false;\r
  75                         }\r
  76                         break;\r
  77                 default:\r
  78                         return false;\r
  79                 }\r
  80                 return true;\r
  81         }       \r
  82         \r
  83         \r
  84         public void doFilter(INyARRgbRaster i_input, NyARGrayscaleRaster i_output) throws NyARException\r
  85         {\r
  86                 assert (i_input.getSize().isEqualSize(i_output.getSize()) == true);\r
  87                 this._dofilterimpl.doFilter(i_input,i_output,i_input.getSize());\r
  88         }\r
  89         \r
  90         interface IdoFilterImpl\r
  91         {\r
  92                 public void doFilter(INyARRaster i_input, INyARRaster i_output,NyARIntSize i_size) throws NyARException;\r
  93         }\r
  94         class IdoFilterImpl_BYTE1D_B8G8R8_24 implements IdoFilterImpl\r
  95         {\r
  96                 /**\r
  97                  * This function is not optimized.\r
  98                  */\r
  99                 public void doFilter(INyARRaster i_input, INyARRaster i_output,NyARIntSize i_size) throws NyARException\r
 100                 {\r
 101                         assert(         i_input.isEqualBufferType(INyARRaster.BUFFERFORMAT_BYTE1D_B8G8R8_24)\r
 102                                         ||      i_input.isEqualBufferType(INyARRaster.BUFFERFORMAT_BYTE1D_R8G8B8_24));\r
 103                         assert(i_output.isEqualBufferType(INyARRaster.BUFFERFORMAT_INT1D_GRAY_8));\r
 104                         \r
 105                         int[] out_buf = (int[]) i_output.getBuffer();\r
 106                         byte[] in_buf = (byte[]) i_input.getBuffer();\r
 107 \r
 108                         int bp = 0;\r
 109                         for (int y = 0; y < i_size.h; y++) {\r
 110                                 for (int x = 0; x < i_size.w; x++) {\r
 111                                         out_buf[y*i_size.w+x] = ((in_buf[bp] & 0xff) * (in_buf[bp + 1] & 0xff) * (in_buf[bp + 2] & 0xff)) >> 16;\r
 112                                         bp += 3;\r
 113                                 }\r
 114                         }\r
 115                         return;\r
 116                 }\r
 117         }\r
 118         \r
 119 }\r
 120 \r