diff --git a/sourceCode/wheelArchHeigthMeasure.cpp b/sourceCode/wheelArchHeigthMeasure.cpp
index 8c85a08..f15c5f1 100644
--- a/sourceCode/wheelArchHeigthMeasure.cpp
+++ b/sourceCode/wheelArchHeigthMeasure.cpp
@@ -17,7 +17,8 @@
 //version 1.3.6 : 轮眉到轮心高度计算方法进行了修正，重新从由两点距离修改为Y高度差。
 //version 1.4.0 : 添加了标定块凹槽长度计算API。
 //version 1.4.1 : 优化了标定块凹槽长度计算方法，使用前部1/4和后部1/4点计算，跳开中间波动比较大的点。
-std::string	m_strVersion = "1.4.1";
+//version 1.4.2 : 优化标定块凹槽长度计算方法，添加了噪点滤除。
+std::string	m_strVersion = "1.4.2";
 const char* wd_wheelArchHeigthMeasureVersion(void)
 {
 	return m_strVersion.c_str();
@@ -1200,20 +1201,38 @@ double wd_getCalibrationBlockLength(
 
 	//计算长度
 	std::vector<std::vector<SVzNL3DPosition>> validLines;
+
 	for (int line = 0; line < lineNum; line++)
 	{
 		std::vector< SVzNL3DPosition> lineData;
+		std::vector< int> ptIdxCheck;
 		for (int j = 0; j < linePtNum; j++)
 		{
 			if (objMask[line][j] >= 0)
 			{
 				int clusterPtIdx = objMask[line][j];
-				if(objClusters[objIdx][clusterPtIdx].pt3D.z > 1e-4)
+				if (objClusters[objIdx][clusterPtIdx].pt3D.z > 1e-4)
+				{
 					lineData.push_back(objClusters[objIdx][clusterPtIdx]);
+					ptIdxCheck.push_back(j);
+				}
 			}
 		}
-		if(lineData.size() > 10)
-			validLines.push_back(lineData);
+		if (lineData.size() > 10)
+		{
+			bool validLine = true;
+			for (int j = 1; j < (int)lineData.size(); j++)
+			{
+				if (ptIdxCheck[j] - ptIdxCheck[j - 1] > 3)
+				{
+					validLine = false;
+					break;
+				}
+
+			}
+			if(true == validLine)
+				validLines.push_back(lineData);
+		}	
 	}
 
 	std::vector<double> gaugeLen;
diff --git a/wheelArchHeigthMeasure_test/wheelArchHeigthMeasure_test.cpp b/wheelArchHeigthMeasure_test/wheelArchHeigthMeasure_test.cpp
index e4eaa38..e747483 100644
--- a/wheelArchHeigthMeasure_test/wheelArchHeigthMeasure_test.cpp
+++ b/wheelArchHeigthMeasure_test/wheelArchHeigthMeasure_test.cpp
@@ -2960,7 +2960,7 @@ int main()
 	};
 
 	SVzNLRange fileIdx[4] = {
-		{1,20}, {1,20}, {1,20}, {1,21}
+		{1,20}, {1,20}, {21,21}, {22,22}
 	};
 
 	const char* ver = wd_wheelArchHeigthMeasureVersion();
@@ -2996,9 +2996,9 @@ int main()
 
 			SSG_treeGrowParam growParam;
 			growParam.maxLineSkipNum = 5;
-			growParam.yDeviation_max = 5.0;
-			growParam.maxSkipDistance = 5.0;
-			growParam.zDeviation_max = 5.0;// 
+			growParam.yDeviation_max = 1.5;
+			growParam.maxSkipDistance = 1.5;
+			growParam.zDeviation_max = 1.5;// 
 			growParam.minLTypeTreeLen = 100; //mm
 			growParam.minVTypeTreeLen = 100; //mm
 			SVzNLRangeD calibratiionBlockYRange = { -1000, 500 };