git-svn-id: http://svn.sourceforge.jp/svnroot/nyartoolkit/NyARToolkit/trunk@768 7cac0...

[nyartoolkit-and/nyartoolkit-and.git] / lib / src / jp / nyatla / nyartoolkit / core / types / NyARHistogram.java

diff --git a/lib/src/jp/nyatla/nyartoolkit/core/types/NyARHistogram.java b/lib/src/jp/nyatla/nyartoolkit/core/types/NyARHistogram.java
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+/* \r
+ * PROJECT: NyARToolkit\r
+ * --------------------------------------------------------------------------------\r
+ * This work is based on the original ARToolKit developed by\r
+ *   Hirokazu Kato\r
+ *   Mark Billinghurst\r
+ *   HITLab, University of Washington, Seattle\r
+ * http://www.hitl.washington.edu/artoolkit/\r
+ *\r
+ * The NyARToolkit is Java edition ARToolKit class library.\r
+ * Copyright (C)2008-2010 Ryo Iizuka\r
+ *\r
+ * This program is free software: you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation, either version 3 of the License, or\r
+ * (at your option) any later version.\r
+ * \r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.\r
+ * \r
+ * For further information please contact.\r
+ *     http://nyatla.jp/nyatoolkit/\r
+ *     <airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>\r
+ * \r
+ */\r
+package jp.nyatla.nyartoolkit.core.types;\r
+\r
+/**\r
+ * ヒストグラムを格納するクラスです。\r
+ */\r
+public class NyARHistogram\r
+{\r
+       /**\r
+        * サンプリング値の格納変数\r
+        */\r
+       public final int[] data;\r
+       /**\r
+        * 有効なサンプリング値の範囲。[0-data.length-1]\r
+        */\r
+       public int length;\r
+       /**\r
+        * 有効なサンプルの総数 data[i]\r
+        */\r
+       public int total_of_data;\r
+       \r
+       \r
+       \r
+       public NyARHistogram(int i_length)\r
+       {\r
+               this.data=new int[i_length];\r
+               this.length=i_length;\r
+               this.total_of_data=0;\r
+       }\r
+       /**\r
+        * 区間i_stからi_edまでの総データ数を返します。\r
+        * @param i_st\r
+        * @param i_ed\r
+        * @return\r
+        */\r
+       public final int getTotal(int i_st,int i_ed)\r
+       {\r
+               assert(i_st<i_ed && i_ed<this.length);\r
+               int result=0;\r
+               int[] s=this.data;\r
+               for(int i=i_st;i<=i_ed;i++){\r
+                       result+=s[i];\r
+               }\r
+               return result;\r
+       }\r
+       /**\r
+        * 指定したi_pos未満サンプルを０にします。\r
+        * @param i_pos\r
+        */\r
+       public void lowCut(int i_pos)\r
+       {\r
+               int s=0;\r
+               for(int i=0;i<i_pos;i++){\r
+                       s+=this.data[i];\r
+                       this.data[i]=0;\r
+               }\r
+               this.total_of_data-=s;\r
+       }\r
+       /**\r
+        * 指定したi_pos以上のサンプルを０にします。\r
+        * @param i_pos\r
+        */\r
+       public void highCut(int i_pos)\r
+       {\r
+               int s=0;\r
+               for(int i=this.length-1;i>=i_pos;i--){\r
+                       s+=this.data[i];\r
+                       this.data[i]=0;\r
+               }\r
+               this.total_of_data-=s;\r
+       }\r
+       /**\r
+        * 最小の値が格納されているサンプル番号を返します。\r
+        */\r
+       public int getMinSample()\r
+       {\r
+               int[] data=this.data;\r
+               int ret=this.length-1;\r
+               int min=data[ret];\r
+               for(int i=this.length-2;i>=0;i--)\r
+               {\r
+                       if(data[i]<min){\r
+                               min=data[i];\r
+                               ret=i;\r
+                       }\r
+               }\r
+               return ret;\r
+       }\r
+       /**\r
+        * サンプルの中で最小の値を返します。\r
+        * @return\r
+        */\r
+       public int getMinData()\r
+       {\r
+               return this.data[this.getMinSample()];\r
+       }\r
+       /**\r
+        * 平均値を計算します。\r
+        * @return\r
+        */\r
+       public int getAverage()\r
+       {\r
+               long sum=0;\r
+               for(int i=this.length-1;i>=0;i--)\r
+               {\r
+                       sum+=this.data[i]*i;\r
+               }\r
+               return (int)(sum/this.total_of_data);\r
+       }\r
+       \r
+}\r