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diff --git a/tags/2.5.1/src/jp/nyatla/nyartoolkit/core/analyzer/raster/threshold/NyARRasterThresholdAnalyzer_SlidePTile.java b/tags/2.5.1/src/jp/nyatla/nyartoolkit/core/analyzer/raster/threshold/NyARRasterThresholdAnalyzer_SlidePTile.java
new file mode 100644
index 0000000..3c7fb9d
--- /dev/null
+++ b/tags/2.5.1/src/jp/nyatla/nyartoolkit/core/analyzer/raster/threshold/NyARRasterThresholdAnalyzer_SlidePTile.java
@@ -0,0 +1,43 @@
+package jp.nyatla.nyartoolkit.core.analyzer.raster.threshold;
+
+import jp.nyatla.nyartoolkit.NyARException;
+import jp.nyatla.nyartoolkit.core.analyzer.histogram.*;
+import jp.nyatla.nyartoolkit.core.analyzer.raster.*;
+import jp.nyatla.nyartoolkit.core.raster.INyARRaster;
+import jp.nyatla.nyartoolkit.core.types.NyARHistogram;
+/**
+ * 明点と暗点をPタイル法で検出して、その中央値を閾値とする。
+ * 
+ * 
+ */
+public class NyARRasterThresholdAnalyzer_SlidePTile implements INyARRasterThresholdAnalyzer
+{
+	protected NyARRasterAnalyzer_Histogram _raster_analyzer;
+	private NyARHistogramAnalyzer_SlidePTile _sptile;
+	private NyARHistogram _histogram;
+	public void setVerticalInterval(int i_step)
+	{
+		this._raster_analyzer.setVerticalInterval(i_step);
+		return;
+	}
+	public NyARRasterThresholdAnalyzer_SlidePTile(int i_persentage,int i_raster_format,int i_vertical_interval) throws NyARException
+	{
+		assert (0 <= i_persentage && i_persentage <= 50);
+		//初期化
+		if(!initInstance(i_raster_format,i_vertical_interval)){
+			throw new NyARException();
+		}
+		this._sptile=new NyARHistogramAnalyzer_SlidePTile(i_persentage);
+		this._histogram=new NyARHistogram(256);
+	}
+	protected boolean initInstance(int i_raster_format,int i_vertical_interval) throws NyARException
+	{
+		this._raster_analyzer=new NyARRasterAnalyzer_Histogram(i_raster_format,i_vertical_interval);
+		return true;
+	}
+	public int analyzeRaster(INyARRaster i_input) throws NyARException
+	{
+		this._raster_analyzer.analyzeRaster(i_input, this._histogram);
+		return this._sptile.getThreshold(this._histogram);
+	}
+}