trunk/src/jp/nyatla/nyartoolkit/core/rasterfilter/gs2bin/NyARRasterFilter_ConstantThrshold.java

   1 package jp.nyatla.nyartoolkit.core.rasterfilter.gs2bin;\r
   2 \r
   3 import jp.nyatla.nyartoolkit.NyARException;\r
   4 import jp.nyatla.nyartoolkit.core.raster.NyARBinRaster;\r
   5 import jp.nyatla.nyartoolkit.core.raster.NyARGrayscaleRaster;\r
   6 import jp.nyatla.nyartoolkit.core.rasterreader.INyARBufferReader;\r
   7 import jp.nyatla.nyartoolkit.core.types.NyARIntSize;\r
   8 \r
   9 public class NyARRasterFilter_ConstantThrshold implements INyARRasterFilter_Gs2Bin\r
  10 {\r
  11         public int _threshold;\r
  12         public NyARRasterFilter_ConstantThrshold(int i_initial_threshold,int i_in_raster_type,int i_out_raster_type) throws NyARException\r
  13         {\r
  14                 assert(i_in_raster_type==INyARBufferReader.BUFFERFORMAT_INT1D_GRAY_8);\r
  15                 assert(i_out_raster_type==INyARBufferReader.BUFFERFORMAT_INT1D_BIN_8);\r
  16                 //初期化\r
  17                 this._threshold=i_initial_threshold;\r
  18                 \r
  19         }\r
  20         /**\r
  21          * ２値化の閾値を設定する。\r
  22          * 暗点<=th<明点となります。\r
  23          * @throws NyARException\r
  24          */\r
  25         public NyARRasterFilter_ConstantThrshold() throws NyARException\r
  26         {\r
  27                 this._threshold=0;\r
  28         }\r
  29 \r
  30         \r
  31         public void setThreshold(int i_threshold)\r
  32         {\r
  33                 this._threshold = i_threshold;\r
  34         }\r
  35         public void doFilter(NyARGrayscaleRaster i_input, NyARBinRaster i_output) throws NyARException\r
  36         {\r
  37                 assert(i_input.getBufferReader().getBufferType()==INyARBufferReader.BUFFERFORMAT_INT1D_GRAY_8);\r
  38                 assert(i_output.getBufferReader().getBufferType()==INyARBufferReader.BUFFERFORMAT_INT1D_BIN_8);\r
  39                 int[] out_buf = (int[]) i_output.getBufferReader().getBuffer();\r
  40                 int[] in_buf = (int[]) i_input.getBufferReader().getBuffer();\r
  41                 NyARIntSize s=i_input.getSize();\r
  42                 \r
  43                 final int th=this._threshold;\r
  44                 int bp =s.w*s.h-1;\r
  45                 final int pix_count   =s.h*s.w;\r
  46                 final int pix_mod_part=pix_count-(pix_count%8);\r
  47                 for(bp=pix_count-1;bp>=pix_mod_part;bp--){\r
  48                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  49                 }\r
  50                 //タイリング\r
  51                 for (;bp>=0;) {\r
  52                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  53                         bp--;\r
  54                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  55                         bp--;\r
  56                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  57                         bp--;\r
  58                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  59                         bp--;\r
  60                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  61                         bp--;\r
  62                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  63                         bp--;\r
  64                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  65                         bp--;\r
  66                         out_buf[bp]=(in_buf[bp] & 0xff)<=th?0:1;\r
  67                         bp--;\r
  68                 }\r
  69                 return;                 \r
  70         }\r
  71 }\r