在MFC图片控件中打开摄像头实时拍照

1.功能简介

用大恒相机实时拍摄电池照片，然后根据模板对样品进行检测，然后根据模板进行匹配，结果匹配成功的进行画圈。

2.安装大恒相机的驱动，保证用自带软件可以打开相机

3.打开halcon12，打开相机采集助手，然后识别设备，点击实时，看能否打开相机进行实时拍照，如果可以的话说明在MFC对话框中就可以实现打开相机。

4.点击生成代码将打开相机的代码转成C++，复制代码到MFC中，但是导出代码后在我的MFC对话框上无法显示相机图像，一直报错。后来搞了好久才在网上找到答案：在halcon安装目录下找到关于我所用大恒相机的那个DLL文件拷贝到MFC工程目录下，问题解决。

5.相机打开后只能拍一张，while循环有问题，发现无法实时拍照，所以决定重载一个消息ON_WM_TIME，设置一个定时器调用ontimer函数。

6.如果要保证实时检测和手动检测可以随时地切换的话，那么在图片控件的窗口句柄那里就要建立一个公共的变量，方便随时转换。oninitdialog函数代码：

CRect rtWindow;
HWND hImgWnd = GetDlgItem(IDC_PIC1)->m_hWnd;
GetDlgItem(IDC_PIC1)->GetClientRect(&rtWindow);
SetWindowAttr("background_color", "white");
OpenWindow(rtWindow.left, rtWindow.top, rtWindow.Width(), rtWindow.Height(), (Hlong)hImgWnd, "visible", "", &hv_WindowHandle);
SetColor(hv_WindowHandle, "red");
SetLineWidth(hv_WindowHandle, 3);

7.显示的图片假如格式是PNG的话，那么显示出来是黑白的效果，所以需要改成bmp或者jpg的格式。

8.实时显示的样品检测假如匹配成功后需要画圆，圆的半径可以从模板上获取，代码如下：

void CWSBCRDlg::OnTimer(UINT_PTR nIDEvent)

if (hv_Score > 0.1)
{
HTuple  hv_Row, hv_Column, hv_Radius, hv_StartPhi;
HTuple  hv_EndPhi, hv_PointOrder;

GenContourRegionXld(ho_model, &ho_Contours, "border");
FitCircleContourXld(ho_Contours, "ahuber", -1, 0, 0, 3, 2, &hv_Row, &hv_Column,
&hv_Radius, &hv_StartPhi, &hv_EndPhi, &hv_PointOrder);
GenCircle(&ho_ImageSearch1, hv_RowCheck, hv_ColumnCheck, hv_Radius);
GenContourRegionXld(ho_ImageSearch1, &ho_Contours, "border");
DispObj(ho_Contours, hv_WindowHandle);
}

9.创建模板

void CWSBCRDlg::OnBnClickedButton7()
{
// TODO:  在此添加控件通知处理程序代码
KillTimer(1);
DrawCircle(hv_WindowHandle, &hv_Row, &hv_Column, &hv_Radius);
GenCircle(&ho_circleout, hv_Row, hv_Column, hv_Radius);

ReduceDomain(ho_Image, ho_circleout, &ho_ImageReduced);
WriteImage(ho_ImageReduced, "png", 0, "C:/Users/Administrator/Desktop/电池字符识别分类/02图片/有无检测/1.png");
MessageBox("模板已存至指定目录！");
modelnum++;
}

10.选择模板

void CWSBCRDlg::OnBnClickedButton14()
{
// TODO:  在此添加控件通知处理程序代码
char* pcsun = "图片文件(*.bmp *.png *.jpg)|*.bmp;*.png;*jpg|All Files (*.*)|*.*||";
CFileDialog OpenDialog(TRUE, NULL, 0, OFN_OVERWRITEPROMPT, pcsun, NULL);
if (OpenDialog.DoModal() == IDCANCEL) return; //返回带文件名的路径，并传递给编辑控件变量
CString str = OpenDialog.GetPathName();
//CString str = "C:/Users/Administrator/Desktop/1.png";
char* ch = (char*)LPCTSTR(str);
ReadImage(&ho_model, ch);

HTuple width, height,hv_WindowHandle1;
GetImageSize(ho_model, &height, &width);
CRect rtWindow;
HWND hImgWnd = GetDlgItem(IDC_PIC2)->m_hWnd;
GetDlgItem(IDC_PIC2)->GetClientRect(&rtWindow);
OpenWindow(rtWindow.left, rtWindow.top, rtWindow.Width(), rtWindow.Height(), (Hlong)hImgWnd, "visible", "", &hv_WindowHandle1);
SetPart(hv_WindowHandle1, 0, 0, width, height);
DispObj(ho_model, hv_WindowHandle1);
failnum = 1;
}

11.实时检测

void CWSBCRDlg::OnBnClickedButton8()
{
// TODO:  在此添加控件通知处理程序代码
OpenFramegrabber("DahengCAM", 1, 1, 0, 0, 0, 0, "interlaced", 8, "gray", -1, "false",
"HV-xx51", "1", 1, -1, &hv_AcqHandle);
GrabImageStart(hv_AcqHandle, -1);

GrabImageAsync(&ho_Image, hv_AcqHandle, -1);
GetImageSize(ho_Image, &height, &width);
SetPart(hv_WindowHandle, 0, 0, width, height);
DispObj(ho_Image, hv_WindowHandle);
CloseFramegrabber(hv_AcqHandle);

SetTimer(1, 100, NULL);

}

void CWSBCRDlg::OnTimer(UINT_PTR nIDEvent)
{
// TODO:  在此添加消息处理程序代码和/或调用默认值
OpenFramegrabber("DahengCAM", 1, 1, 0, 0, 0, 0, "interlaced", 8, "gray", -1, "false",
"HV-xx51", "1", 1, -1, &hv_AcqHandle);
GrabImageStart(hv_AcqHandle, -1);
GrabImageAsync(&ho_Image, hv_AcqHandle, -1);
GetImageSize(ho_Image, &height, &width);
SetPart(hv_WindowHandle, 0, 0, width, height);
DispObj(ho_Image, hv_WindowHandle);
CloseFramegrabber(hv_AcqHandle);
if (failnum == 1)
{
CreateAnisoShapeModel(ho_model, "auto", HTuple(0).TupleRad(), HTuple(360).TupleRad(),
"auto", 0.98, 1.02, "auto", 0.98, 1.02, "auto", "auto", "use_polarity", "auto",
"auto", &hv_ModelID);
FindAnisoShapeModel(ho_Image, hv_ModelID, HTuple(0).TupleRad(), HTuple(360).TupleRad(),
0.98, 3.02, 0.98, 1.02, 0.5, 1, 0.5, "least_squares_very_high", 0, 0.8, &hv_RowCheck,
&hv_ColumnCheck, &hv_AngleCheck, &hv_ScaleR, &hv_ScaleC, &hv_Score);
if (hv_Score > 0.1)
{
HTuple  hv_Row, hv_Column, hv_Radius, hv_StartPhi;
HTuple  hv_EndPhi, hv_PointOrder;

GenContourRegionXld(ho_model, &ho_Contours, "border");
FitCircleContourXld(ho_Contours, "ahuber", -1, 0, 0, 3, 2, &hv_Row, &hv_Column,
&hv_Radius, &hv_StartPhi, &hv_EndPhi, &hv_PointOrder);
GenCircle(&ho_ImageSearch1, hv_RowCheck, hv_ColumnCheck, hv_Radius);
GenContourRegionXld(ho_ImageSearch1, &ho_Contours, "border");
DispObj(ho_Contours, hv_WindowHandle);
}
ClearShapeModel(hv_ModelID);
}

CDialogEx::OnTimer(nIDEvent);
}

12.手动检测

void CWSBCRDlg::OnBnClickedButton11()
{
// TODO:  在此添加控件通知处理程序代码
char* pcsun = "图片文件(*.bmp *.png *.jpg)|*.bmp;*.png;*jpg|All Files (*.*)|*.*||";
CFileDialog OpenDialog(TRUE, NULL, 0, OFN_OVERWRITEPROMPT, pcsun, NULL);
if (OpenDialog.DoModal() == IDCANCEL) return; //返回带文件名的路径，并传递给编辑控件变量
CString str = OpenDialog.GetPathName();
//CString str = "C:/Users/Administrator/Desktop/1.png";
char* ch = (char*)LPCTSTR(str);
ReadImage(&ho_ImageSearch, ch);
//ReadImage(&ho_ImageSearch, "C:/Users/Administrator/Desktop/电池字符识别分类/02图片/有无检测/2.jpg");
GetImageSize(ho_ImageSearch, &height, &width);
SetPart(hv_WindowHandle, 0, 0, width, height);
DispObj(ho_ImageSearch, hv_WindowHandle);
CreateAnisoShapeModel(ho_model, "auto", HTuple(0).TupleRad(), HTuple(360).TupleRad(),
"auto", 0.98, 1.02, "auto", 0.98, 1.02, "auto", "auto", "use_polarity", "auto",
"auto", &hv_ModelID);
FindAnisoShapeModel(ho_ImageSearch, hv_ModelID, HTuple(0).TupleRad(), HTuple(360).TupleRad(),
0.98, 1.02, 0.98, 1.02, 0.5, 1, 0.5, "least_squares_very_high", 0, 0.8, &hv_RowCheck,
&hv_ColumnCheck, &hv_AngleCheck, &hv_ScaleR, &hv_ScaleC, &hv_Score);
/*GenCircle(&ho_ImageSearch1, hv_RowCheck, hv_ColumnCheck, hv_Radius);
GenContourRegionXld(ho_ImageSearch1, &ho_Contours, "border");
DispObj(ho_Contours, hv_WindowHandle);*/
if (hv_Score > 0.85)
{
//SetColor(hv_WindowHandle, "blue");
HTuple  hv_Row, hv_Column, hv_Radius, hv_StartPhi;
HTuple  hv_EndPhi, hv_PointOrder;

GenContourRegionXld(ho_model, &ho_Contours, "border");
FitCircleContourXld(ho_Contours, "ahuber", -1, 0, 0, 3, 2, &hv_Row, &hv_Column,
&hv_Radius, &hv_StartPhi, &hv_EndPhi, &hv_PointOrder);
GenCircle(&ho_ImageSearch1, hv_RowCheck, hv_ColumnCheck, hv_Radius);
GenContourRegionXld(ho_ImageSearch1, &ho_Contours, "border");
DispObj(ho_Contours, hv_WindowHandle);
MessageBox("识别成功！");
}
ClearShapeModel(hv_ModelID);
}

13.停止检测

void CWSBCRDlg::OnBnClickedButton9()
{
// TODO:  在此添加控件通知处理程序代码
KillTimer(1);
//ReadImage(&ho_Image, "C:/Users/Administrator/Desktop/电池字符识别分类/02图片/有无检测/1.bmp");
ReadImage(&ho_Image, "res/1.bmp");
GetImageSize(ho_Image, &height, &width);
SetPart(hv_WindowHandle, 0, 0, width, height);
DispObj(ho_Image, hv_WindowHandle);
}

14.检测效果