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				C#与halcon联合编程之窗体内图像常见操作					
					
					
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							admin 2023年2月27日 11:44
								本文热度 2756 |  目录:读取图片 拉伸显示 不拉伸,原图比例显示 图像缩放 图像移动,实时移动 图像自适应  
 
 读取图片://获取文件路径下的图片        public HObject GetImgfromPath(string imgPath)        {            HObject L_Img;            HOperatorSet.GenEmptyObj(out L_Img);//清空图片            L_Img.Dispose();//释放            HOperatorSet.ReadImage(out L_Img, imgPath);//读取图片存入到l_img            return L_Img;        }
 拉伸显示//图片拉伸显示        public void  ImgIsStretchDisplay(HObject L_Img, HTuple Hwindow)        {            HTuple hv_Width,hv_Height;            HOperatorSet.ClearWindow(Hwindow);//清空画面            HOperatorSet.GetImageSize(L_Img, out hv_Width, out hv_Height);//获取图片大小规格            HOperatorSet.SetPart(Hwindow, 0, 0, hv_Height, hv_Width);//设置窗体的规格            HOperatorSet.DispObj(L_Img, Hwindow);//显示图片
        }
 不拉伸,原图比例显示//图片不拉伸显示        public void ImgIsNotStretchDisplay(HObject L_Img, HTuple Hwindow)        {            HTuple hv_Width, hv_Height;            HTuple win_Width, win_Height, win_Col, win_Row, cwin_Width, cwin_Height;            HOperatorSet.ClearWindow(Hwindow);            HOperatorSet.GetImageSize(L_Img, out hv_Width, out hv_Height);//获取图片大小规格            HOperatorSet.GetWindowExtents(Hwindow, out win_Row, out win_Col, out win_Width, out win_Height);//获取窗体大小规格            cwin_Height = 1.0 * win_Height / win_Width * hv_Width;//宽不变计算高                      if (cwin_Height > hv_Height)//宽不变高能容纳            {                cwin_Height = 1.0 * (cwin_Height - hv_Height) / 2;                HOperatorSet.SetPart(Hwindow, -cwin_Height, 0, cwin_Height + hv_Height, hv_Width);//设置窗体的规格            }            else//高不变宽能容纳            {                cwin_Width = 1.0 * win_Width / win_Height * hv_Height;//高不变计算宽                cwin_Width = 1.0 * (cwin_Width - hv_Width) / 2;                HOperatorSet.SetPart(Hwindow, 0, -cwin_Width, hv_Height, cwin_Width + hv_Width);//设置窗体的规格            }            HOperatorSet.DispObj(L_Img, Hwindow);//显示图片        }
 图像缩放//图片缩小放大,配合鼠标滚轮事件        public  void ImgZoom(HObject L_Img, HTuple Hwindow, int Delta = 0)        {            HTuple Zoom, Row, Col, L_Button;            HTuple hv_Width, hv_Height;            HTuple Row0, Column0, Row00, Column00, Ht, Wt;            HTuple[] Now_Pos = new HTuple[4];            if (Delta > 0)//鼠标滚动格值,一般120            {                Zoom = 1.2;//向上滚动,放大倍数            }            else            {                Zoom = 0.8;//向下滚动,缩小倍数            }            HOperatorSet.GetMposition(Hwindow, out Row, out Col, out L_Button);//获取当前鼠标的位置            HOperatorSet.GetPart(Hwindow, out Row0, out Column0, out Row00, out Column00);//获取当前窗体的大小规格            HOperatorSet.GetImageSize(L_Img, out hv_Width, out hv_Height);//获取图片大小规格            Ht = Row00 - Row0;            Wt = Column00 - Column0;            if (Ht * Wt < 32000 * 32000 || Zoom == 1.2)            {                Now_Pos[0] = (Row0 + ((1 - (1.0 / Zoom)) * (Row - Row0)));                Now_Pos[1] = (Column0 + ((1 - (1.0 / Zoom)) * (Col - Column0)));                Now_Pos[2] = Now_Pos[0] + (Ht / Zoom);                Now_Pos[3] = Now_Pos[1] + (Wt / Zoom);                HOperatorSet.SetPart(Hwindow, Now_Pos[0], Now_Pos[1], Now_Pos[2], Now_Pos[3]);                HOperatorSet.ClearWindow(Hwindow);                HOperatorSet.DispObj(L_Img, Hwindow);            }            else            {                ImgIsNotStretchDisplay(L_Img, Hwindow);//不拉伸显示            }
        }
 图像移动,实时移动:HTuple oldRow, oldColumn;        //鼠标按下去拖着图像移动,配合鼠标坐标按下与移动事件        public void MouseDownMoveImg(HObject L_Img, HTuple Hwindow)        {            HTuple row1, col1, row2, col2, Row, Column, Button;            HOperatorSet.GetMposition(Hwindow, out Row, out Column, out Button);            double RowMove = Row - oldRow;             double ColMove = Column - oldColumn;            HOperatorSet.GetPart(Hwindow, out row1, out col1, out row2, out col2);//得到当前的窗口坐标            HOperatorSet.SetPart(Hwindow, row1 - RowMove, col1 - ColMove, row2 - RowMove, col2 - ColMove);
            //防止刷新图片太快的时候闪烁            HOperatorSet.SetSystem("flush_graphic", "false");            HOperatorSet.ClearWindow(Hwindow);            HOperatorSet.SetSystem("flush_graphic", "true");            //
            HOperatorSet.DispObj(L_Img, Hwindow);        }
        public void SaveMouseDownPosition(HTuple Hwindow)        {            HTuple Button;            HOperatorSet.GetMposition(Hwindow, out oldRow, out oldColumn, out Button);        }
 图像自适应//设置自动适应        private void tsMAutoFit_Click(object sender, EventArgs e)        {            try            {                ImgIsNotStretchDisplay(ho_Image1, hWindowControl1.HalconWindow);            }            catch (Exception)            {                MessageBox.Show("自适应失败,请插入图像!");            }                  }
 该文章在 2023/2/27 11:44:40 编辑过
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