鼠标交互绘制与修改ROI

Demo效果

视觉鼠标绘制与修改ROI（Region of Interest，感兴趣区域）是计算机视觉和图像处理中的常见任务。以下是实现这一功能的基本步骤和代码示例。

变量声明

 //ROI显示序号
 private int roiCounter = 1;
 //存储ROI序号的的字典列表数据
 private Dictionary<int, HTuple> roiDateDic = new Dictionary<int, HTuple>();
 //存储ROI图形的的字典列表数据
 private Dictionary<int, HObject> roiObjDic = new Dictionary<int, HObject>();
 //编辑的ROI序号
 private int editKey;

绘制ROI

 private async void BtnDrawRoi_Click(object sender, EventArgs e)
 {
     showWorkMsg(listView1, "开始绘制", Color.DarkBlue);
     await Task.Run(() =>
    {
        //绘制ROI
        hSW.SetColor("yellow");
        hSW.DrawRectangle1(out var R1, out var C1, out var R2, out var C2);

        //生成ROI
        HOperatorSet.GenRectangle1(out var rectangle, R1, C1, R2, C2);


        //存储Roi数据
        roiDateDic.Add(roiCounter, new HTuple(R1, C1, R2, C2));
        //存储Roi图形
        roiObjDic.Add(roiCounter, rectangle);
        //显示ROI
        //hSW.SetColor("green");
        hSW.SetDraw("margin");
        hSW.SetLineWidth(3);
        hSW.DispRectangle1(R1, C1, R2, C2);
        //将当前绘制ROI序号添加到列表框中(跨线程操作)
        CmbROI.Invoke(() =>
        {
            //添加序号
            CmbROI.Items.Add(roiCounter);
            //设置当前选中
            CmbROI.SelectedItem = roiCounter;
        });
        //设置显示序号，并且序号自加
        HOperatorSet.DispText(hSW, roiCounter++, "image", R1, C1, "white", new HTuple("box_color"), new HTuple("red"));


    });
     showWorkMsg(listView1, "结束绘制", Color.DarkBlue);
 }

UI

ContextMenuStrip菜单

 #region ContextMenuStrip菜单
 /// <summary>
 /// 修改ROI
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private async void RoiXiuGai_Click(object sender, EventArgs e)
 {
     showWorkMsg(listView1, "开始修改ROI区域", Color.DarkBlue);
     //需要编辑的ROI序号
     var currentKey = editKey;
     //在smartWindow中所有绘制都需要异步线程
     await Task.Run(() =>
     {
         //判断ROI区域中是否存在该Key
         if (roiDateDic.ContainsKey(currentKey))
         {

             //获取当前ROI
             var roiData = roiDateDic[currentKey];
             //清空对应ROI
             hSW.DispObj(roiObjDic[currentKey]);
             roiObjDic.Remove(currentKey);
             ClearSelect();
             hSW.SetColor("yellow");
             //交互绘制
             hSW.DrawRectangle1Mod(roiData[0], roiData[1], roiData[2], roiData[3], out var R1, out var C1, out var R2, out var C2);

             //生成新区域
             HOperatorSet.GenRectangle1(out var rectangle, R1, C1, R2, C2);
             //重新保存区域
             roiDateDic[currentKey] = new HTuple(R1, C1, R2, C2);
             roiObjDic[currentKey] = rectangle;
             //设置显示颜色
             hSW.SetColor("red");
             //显示区域
             hSW.DispObj(rectangle);
             //显示角标
             HOperatorSet.DispText(hSW, currentKey, "image", roiData[0], roiData[1], "white", new HTuple("box_color"), new HTuple("red"));
             //hSW.ClearWindow();
             ClearSelect();
         }
     });

     showWorkMsg(listView1, "结束修改ROI区域", Color.DarkBlue);
 }
 /// <summary>
 /// 删除对应ROI
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void RoiRemove_Click(object sender, EventArgs e)
 {
     //需要编辑的ROI序号
     var currentKey = editKey;
     //移除对应对象
     roiObjDic.Remove(currentKey);
     roiDateDic.Remove(currentKey);
     //刷新显示
     ClearSelect();
 }
 #endregion

鼠标移动交互事件

 /// <summary>
 /// 鼠标交互事件
 /// </summary>

 private void hSmartWindowControl1_HMouseMove(object sender, HMouseEventArgs e)
 {
     //获取鼠标位置
     var mX = e.X;
     var mY = e.Y;
     //遍历所有绘制的ROI数据
     foreach (var roi in roiObjDic)
     {
         //获取当前数据和对象
         var roiData = roiDateDic[roi.Key];
         var roiObj = roi.Value;
         //判断当前鼠标是否在Roi范围内
         bool Isinside = IsRoiRectange(roiData, mX, mY);
         if (Isinside)
         {
             hSW.SetColor("red");
             //showWorkMsg(listView1, "选择ROI", Color.DarkBlue);
         }
         else
         {
             hSW.SetColor("green");
             //showWorkMsg(listView1, "wei选择ROI", Color.DarkBlue);
         }
         hSW.DispObj(roiObj);
     }
 }

 private bool IsRoiRectange(HTuple roiData, double mX, double mY)
 {
     hSW.SetDraw("margin");
     //获取ROI位置
     var R1 = roiData[0].D;
     var C1 = roiData[1].D;
     var R2 = roiData[2].D;
     var C2 = roiData[3].D;
     return mX > C1 && mX < C2 && mY > R1 && mY < R2;
 }