一、前言

C#之Winform + Halcon实现图像直线查找功能
1、创建计量模型 HMetrologyModel
2、添加计量对象到线测量
3、设置计量对象参数
4、设置查找参数：边缘阈值、边缘选择、过度方式
5、显示测量点

二、运行结果

三、代码

	double r1 = 50.00, c1 = 300.0;
	double r2 = 150.0, c2 = 300.0;
	double measureLength1 = 10, measureLength2 = 10;
	double measureSigma   = 1,  measureThreshold = 10;
	HTuple genParamName = new HTuple();
	HTuple genParamValue = new HTuple();
 	//*创建计量模型
 	HMetrologyModel metrologyHandle =new HMetrologyModel();
	//*添加计量对象到线测量()
 	metrologyHandle.AddMetrologyObjectLineMeasure(r1,c1,r2,c2, 
 	measureLength1, measureLength2, measureSigma, measureThreshold,
	genParamName, genParamValue);
 	//*设置计量对象参数
 	metrologyHandle.SetMetrologyObjectParam( 0, "measure_length1",100);
 	metrologyHandle.SetMetrologyObjectParam(0, "measure_length2",20);
 	metrologyHandle.SetMetrologyObjectParam(0, "measure_distance",10);
 	//*边缘阈值
 	metrologyHandle.SetMetrologyObjectParam(0, "measure_threshold",10);
 	//*边缘选择
 	metrologyHandle.SetMetrologyObjectParam(0, "measure_select","first");
 	//*过度方式
	metrologyHandle.SetMetrologyObjectParam(0, "measure_transition","positive");
	//ho_image为自己创建的HImage对象实例 HImage ho_image = new HImage()
	//
 	metrologyHandle.ApplyMetrologyModel(ho_image);
 	//*显示测量点
 	HXLDCont contours = new HXLDCont();
 	contours = metrologyHandle.GetMetrologyObjectMeasures(0, "all", out HTuple row, out HTuple column);
 	HXLDCont xldCont = new HXLDCont();
 	xldCont.GenCrossContourXld(row, column, 10, 0.785398);
 	HTuple result = metrologyHandle.GetMetrologyObjectResult(0, "all", "result_type", 
                new HTuple(new string[] { "row_begin", "column_begin", "row_end", "column_end" }));
 	//*获得测量直线
 	double row_begin = result[0];
 	double column_begin = result[1];
 	double row_end = result[2];
 	double column_end = result[3];
 	HXLDCont xldLine = new HXLDCont();
 	xldLine.GenContourPolygonXld(
 	new HTuple(new double[] { row_begin, row_end }),
 	new HTuple(new double[] { column_begin, column_end })
	 );
 	//设置颜色并显示
 	//自己封装的方法
 	hWTool.DispObj(contours,"blue");//测量的直线范围
 	hWTool.DispObj(xldLine, "blue");//测量出来的直线
 	hWTool.DispObj(xldCont, "green");//测量出来的点
 	//hWindowControl1为HWindowControl对象实例
 	//hWindowControl1.HalconWindow.SetColor("blue");
 	//hWindowControl1.HalconWindow.DispObj(xldLine);//测量出来的直线
 	//hWindowControl1.HalconWindow.SetColor("red");
 	//hWindowControl1.HalconWindow.DispObj(contours);//测量的直线范围
 	// hWindowControl1.HalconWindow.SetColor("green");
 	//hWindowControl1.HalconWindow.DispObj(xldCont);//测量出来的点