C#和Halcon交互实现图片的放大和缩小

【转载】 C#和halcon实现图片的放大和缩小

e.Delta>0表示鼠标向上滚动，e.Delta<0表示向下滚动

要拖动的图像为Measure.currentImageL,可以更换。

        #region 鼠标实现放大缩小,移动图片
        //鼠标滚动事件：实现放大和缩小图像
        private void WinHandle_HMouseWheel(object sender, HalconDotNet.HMouseEventArgs e)
        {
            try
            {
                HWindowControl WinHandle = sender as HWindowControl;
                HObject ho_currentImage = null;
                HOperatorSet.GenEmptyObj(out ho_currentImage);
                if (WinHandle.Name == "WinHandle_Left")
                {
                    ho_currentImage = Measure.ho_CurrentImageL;
                }
                if (WinHandle.Name == "WinHandle_Right")
                {
                    ho_currentImage = Measure.ho_CurrentImageR;
                }
                //放大倍数，当前鼠标选择的图像点坐标Row, Col，按下鼠标的左键还是右键：o-没按下，1-左键，2-中键，4-右键
                HTuple Zoom, Row, Col, Button;
                HTuple RowLeftUpper, ColumnLeftUpper, RowRightLower, ColumnRightLower, Ht, Wt, ImagePartRowLeftUp, ImagePartColLeftUp, ImagePartRowRightLow, ImagePartColRightLow;
                //鼠标向上滚动表示放大
                if (e.Delta > 0)
                {
                    Zoom = 1.5;
                }
                //向下滚动缩小
                else
                {
                    Zoom = 0.5;
                }
                //返回输出窗口中鼠标指针和鼠标按钮所按下的像素精确图像坐标，输出当前鼠标指针点的图像坐标以及按下的是鼠标左键还是右键，0是鼠标左键
                HOperatorSet.GetMposition(WinHandle.HalconWindow, out Row, out Col, out Button);
                //Get part返回窗口中显示的图像部分的左上角和右下角

                //得到当前的窗口坐标,Row0:图像部分左上角的行索引,Column0:图像部分左上角的列索引，Row00:图像部分右下角的行索引,Column00:图像部分右下角的列索引
                HOperatorSet.GetPart(WinHandle.HalconWindow, out RowLeftUpper, out ColumnLeftUpper, out RowRightLower, out ColumnRightLower);
                //显示的部分图像的高
                Ht = RowRightLower - RowLeftUpper;
                //显示的部分图像的宽
                Wt = ColumnRightLower - ColumnLeftUpper;
                //普通版halcon能处理的图像最大尺寸是32K*32K。如果无限缩小原图像，导致显示的图像超出限制，则会造成程序崩溃
                if (Ht * Wt < 32000 * 32000 || Zoom == 1.5)
                {
                    //显示的放大或者缩小部分图像的左上角和右下角坐标
                    ImagePartRowLeftUp = (RowLeftUpper + ((1 - (1.0 / Zoom)) * (Row - RowLeftUpper)));
                    ImagePartColLeftUp = (ColumnLeftUpper + ((1 - (1.0 / Zoom)) * (Col - ColumnLeftUpper)));
                    ImagePartRowRightLow = ImagePartRowLeftUp + (Ht / Zoom);
                    ImagePartColRightLow = ImagePartColLeftUp + (Wt / Zoom);
                    //设置部分显示图像
                    HOperatorSet.SetPart(WinHandle.HalconWindow, ImagePartRowLeftUp, ImagePartColLeftUp, ImagePartRowRightLow, ImagePartColRightLow);
                    HOperatorSet.ClearWindow(WinHandle.HalconWindow);
                    if (ho_currentImage != null)
                    {
                        HOperatorSet.DispObj(ho_currentImage, WinHandle.HalconWindow);
                    }
                }
            }
            catch (Exception)
            {

            }
        }

        //【1】鼠标按下，准备拖动图像
        private void WinHandle_HMouseDown(object sender, HalconDotNet.HMouseEventArgs e)
        {
            HWindowControl WinHandle = sender as HWindowControl;
            if (WinHandle.Name == "WinHandle_Left")
            {
                if (Measure.ho_CurrentImageL == null)
                {
                    return;
                }
            }
            if (WinHandle.Name == "WinHandle_Right")
            {
                if (Measure.ho_CurrentImageR == null)
                {
                    return;
                }
            }
            HTuple Row, Column, Button;
            //返回鼠标当前按下点的图像坐标
            HOperatorSet.GetMposition(WinHandle.HalconWindow, out Row, out Column, out Button);
            RowDown = Row;    //鼠标按下时的行坐标
            ColDown = Column; //鼠标按下时的列坐标
        }

        //【2】鼠标移动，开始拖动图像
        private void WinHandle_HMouseMove(object sender, HMouseEventArgs e)
        {
            try
            {
                HWindowControl WinHandle = sender as HWindowControl;
                HObject ho_currentImage = null;
                HOperatorSet.GenEmptyObj(out ho_currentImage);
                if (WinHandle.Name == "WinHandle_Left")
                {
                    ho_currentImage = Measure.ho_CurrentImageL;
                }
                if (WinHandle.Name == "WinHandle_Right")
                {
                    ho_currentImage = Measure.ho_CurrentImageR;
                }
                HTuple Row = new HTuple(), Column = new HTuple(), Button = new HTuple(), pointGray = new HTuple();
                HTuple hv_Width = new HTuple();
                HTuple hv_Height = new HTuple();
                if (ho_currentImage != null)
                {
                    HOperatorSet.GetImageSize(ho_currentImage, out hv_Width, out hv_Height);
                }
                //bug
                HOperatorSet.GetMposition(WinHandle.HalconWindow, out Row, out Column, out Button);
                ////获取当前鼠标的坐标值
                if (hv_Height != null && (Row > 0 && Row < hv_Height) && (Column > 0 && Column < hv_Width))//设置3个条件项，防止程序崩溃。
                {
                    HOperatorSet.GetGrayval(ho_currentImage, Row, Column, out pointGray);                 //获取当前点的灰度值
                }
                else
                {
                    pointGray = "_";
                }
                String str = String.Format("Row:{0}  Column:{1}  Gray:{2}", Row, Column, pointGray);
                ts_Grval.Text = str;
            }
            catch (HalconException )
            {

            }

        }

        //【3】鼠标抬起,完成拖动图像
        private void WinHandle_HMouseUp(object sender, HalconDotNet.HMouseEventArgs e)
        {
            try
            {
                HWindowControl WinHandle = sender as HWindowControl;
                HObject ho_currentImage = null;
                HOperatorSet.GenEmptyObj(out ho_currentImage);
                if (WinHandle.Name == "WinHandle_Left")
                {
                    ho_currentImage = Measure.ho_CurrentImageL;
                }
                if (WinHandle.Name == "WinHandle_Right")
                {
                    ho_currentImage = Measure.ho_CurrentImageR;
                }
                HTuple row1, col1, row2, col2, Row, Column, Button;
                ////获取当前鼠标的坐标值
                HOperatorSet.GetMposition(WinHandle.HalconWindow, out Row, out Column, out Button);
                double RowMove = Row - RowDown;   //鼠标弹起时的行坐标减去按下时的行坐标，得到行坐标的移动值
                double ColMove = Column - ColDown;//鼠标弹起时的列坐标减去按下时的列坐标，得到列坐标的移动值
                //得到当前的窗口坐标
                HOperatorSet.GetPart(WinHandle.HalconWindow, out row1, out col1, out row2, out col2);
                //移动后的左上角和右下角坐标，这里可能有些不好理解。以左上角原点为参考点
                HOperatorSet.SetPart(WinHandle.HalconWindow, row1 - RowMove, col1 - ColMove, row2 - RowMove, col2 - ColMove);
                HOperatorSet.ClearWindow(WinHandle.HalconWindow);
                if (ho_currentImage!=null)
                    HOperatorSet.DispObj(ho_currentImage, WinHandle.HalconWindow);
            }
            catch (Exception)
            {
            }

        }
        #endregion

原图显示

  private void btn_FullWindowLeft_Click(object sender, EventArgs e)
        {
            HOperatorSet.SetPart(WinHandle_Left.HalconWindow, 0, 0, measure.hv_HeightL - 1, measure.hv_WidthL - 1);
            HOperatorSet.ClearWindow(WinHandle_Left.HalconWindow);
            HOperatorSet.DispObj(Measure.ho_CurrentImageL, WinHandle_Left.HalconWindow);
            if (Measure.ho_CurrentImageL != null)
                HOperatorSet.DispObj(Measure.ho_CurrentImageL, WinHandle_Left.HalconWindow);
        }

        private void btn_FullWindowRight_Click(object sender, EventArgs e)
        {
            HOperatorSet.SetPart(WinHandle_Right.HalconWindow, 0, 0, measure.hv_HeightR - 1, measure.hv_WidthR - 1);
            HOperatorSet.ClearWindow(WinHandle_Right.HalconWindow);
            HOperatorSet.DispObj(measure.ho_ImageRectifiedR, WinHandle_Right.HalconWindow);
            HOperatorSet.DispObj(Measure.ho_CurrentImageR, WinHandle_Right.HalconWindow);
            if (Measure.ho_CurrentImageR != null)
                HOperatorSet.DispObj(Measure.ho_CurrentImageR, WinHandle_Right.HalconWindow);
        }