C#与halcon联合 缩放移动自适应图像

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_imgreturn 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

解决缩太小崩溃问题，联合鼠标滚轮事件

//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

解决移动太快图像刷新闪烁问题

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

这里我们采用不拉伸显示函数

//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！");}          }