在上位机中通常需要使用到绘制ROI模块或者获取已经绘制好的ROI区域的参数，在这里通过使用hsmartwindow窗体控件进行对ROI的绘制和获取。
先上代码：

/// <summary>
        /// 创建ROI
        /// </summary>
        /// <param name="Win">传入HSmartWindowControl</param>
        /// <param name="ROItype">需要绘制的ROI类型</param>
        /// <param name="drawingObject">绘制好的ROI参数，传出</param>
        public void Set_DrawHalconROI(HSmartWindowControl Win, HDrawingObject.HDrawingObjectType ROItype, out HDrawingObject drawingObject
                                        )
        {
            switch (ROItype)
            {
                case HDrawingObject.HDrawingObjectType.CIRCLE:
                    drawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.CIRCLE, 500, 500, 300);
                    Win.HalconWindow.AttachDrawingObjectToWindow(drawingObject);
                    break;

                case HDrawingObject.HDrawingObjectType.RECTANGLE2:
                    drawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.RECTANGLE2, 500, 500, 0, 500, 500);
                    Win.HalconWindow.AttachDrawingObjectToWindow(drawingObject);
                    break;

                case HDrawingObject.HDrawingObjectType.LINE:
                    drawingObject = HDrawingObject.CreateDrawingObject(HDrawingObject.HDrawingObjectType.LINE, 200, 200, 500, 500);
                    Win.HalconWindow.AttachDrawingObjectToWindow(drawingObject);
                    break;
                default:
                    drawingObject = null;
                    break;
            }
        }

/// <summary>
        /// 获取ROI参数
        /// </summary>
        /// <param name="ROItype">需要输入的ROI类型</param>
        /// <param name="drawingObject">传入的ROI对象参数</param>
        /// <param name="Result">输出结果double数组</param>
        /// <param name="HROI">输出ROI形状，Hobject类型</param>
        public void Get_DrawHalconROI(HDrawingObject.HDrawingObjectType ROItype, HDrawingObject drawingObject
                                        , out double[] Result, out HObject HROI)
        {
            HTuple paramName = new HTuple(), param = new HTuple();
            string[] paramlist = new string[10];
            switch (ROItype)
            {
                case HDrawingObject.HDrawingObjectType.RECTANGLE2:
                    paramlist = new string[] { "row", "column", "phi", "length1", "length2" };
                    paramName = paramlist;
                    param = drawingObject.GetDrawingObjectParams(paramName);
                    HOperatorSet.GenRectangle2(out HROI, param.DArr[0], param.DArr[1], param.DArr[2], param.DArr[3], param.DArr[4]);
                    Result = param.DArr;
                    break;

                case HDrawingObject.HDrawingObjectType.CIRCLE:

                    paramlist = new string[] { "row", "column", "radius" };
                    paramName = paramlist;
                    param = drawingObject.GetDrawingObjectParams(paramName);
                    HOperatorSet.GenCircle(out HROI, param.DArr[0], param.DArr[1], param.DArr[2]);
                    Result = param.DArr;
                    break;
                case HDrawingObject.HDrawingObjectType.LINE:
                    paramlist = new string[] { "row1", "column1", "row2", "column2" };
                    paramName = paramlist;
                    param = drawingObject.GetDrawingObjectParams(paramName);
                    HOperatorSet.GenRegionLine(out HROI, param.DArr[0], param.DArr[1], param.DArr[2], param.DArr[3]);
                    Result = param.DArr;
                    break;
                default:
                    Result = new double[] { 0 };
                    HROI = null;
                    break;
            }
        }

实际效果：



延申说明：
1.Halcon自带的.netROI是通过调用HDrawingObject中的算子实现的，获取ROI同样也是，如何去得到延申的其他ROI。在Halcon的帮助文档中，搜索SetDrawingObjectParams并在.net格式中我们可以找到halcon所支持的全部ROI区域的参数，我们根据区域参数去获取即可。

注意事项：
1.我们在编写的时候一定要主语获取的ROI的变量名称是否输入错误。我们在传入获取的参数名称需要与文档中的参数名称一一对应，并且大小写不能错误。