Halcon图像与Opencv图像相互转换（C++代码）

在将halcon程序转换到C++代码后有时我们会经常涉及到Halcon里面的Hobject类型的Image与Opencv里面的IplImage类型的Image之间的相互转换。相互转换分装成了两个函数，具体实现如下：
（1）、从Hobject到IplImage
IplImage* HImageToIplImage(Hobject &Hobj)
{
IplImage* pImage;
HTuple htChannels;
char cType[MAX_STRING];
Hlong width,height;
width=height=0;
//转换图像格式
convert_image_type(Hobj,&Hobj,"byte");
count_channels(Hobj,&htChannels);
if(htChannel[0].I()==1)
{
unsinged char* ptr;
get_image_pointer1(Hobj,(Hlong*)&ptr,cType,&width,&height);
pImage=cvCreateImage(cvSize(width,height),IPL_DEPTH_8U,1);
for(int i=0;i {
memcpy(pImage->imageData+pImage->widthStep*i,ptr+width*i,width);
}
}
if(htChannels[0].I()==3)
{
unsinged char *ptrRed , *ptrGreen , *ptrBlue;
ptrRed=ptrGreen=ptrBlue=NULL;
get_image_pointer3(Hobj,(Hlong*)&ptrRed,(Hlong*)&ptrGreen,(Hlong*)&ptrBlue,cType,&width,&height)
IplImage *pImageRed , *pImageGreen , *pImageBlue ;
pImage=cvCreateImage(cvSize(width,height),IPL_DEPTH_8U,3);
pImageRed=cvCreateImage(cvSize(width,height),IPL_DEPTH_8U,1);
pImageGreen=cvCreateImage(cvSize(width,height),IPL_DEPTH_8U,1);
pImageBlue=cvCreateImage(cvSize(width,height),IPL_DEPTH_8U,1);
for(int i=0;i {
memcpy(pImageRed->imageData+pImageRed->widthStep*i , ptrRed+width*i , width);
memcpy(pImageGreen->imageData+pImageGreen->widthStep*i , ptrGreen+width*i , width);
memcpy(pImageBlue->imageData+pImageBlue->widthStep*i , ptrBlue+width*i , width);
}
cvMerge(pImageBlue,pImageGreen,pImageRed,NULL,pImage);
cvReleaseImage(&pImageRed);
cvReleaseImage(&pImageGreen);
cvReleaseImage(&pImageBlue);
}
return pImage;
}

（2）、从IplImage到Hobject
Hobject IplImageToHImage(IplImage* pImage)
{
Hobject Hobj;
if(pImage->nChannels==1)
{
int height=pImage->height;
int width=pImage->width;
uchar *dataGray=new uchar[width*height];
for(int i=0; i {
memcpy(dataGray+width*i, pImage->imageData+pImage->widthStep*i,width);
}
gen_image1(&Hobj,"byte",pImage->width,pImage->height,(Hlong)(dataGray));
delete[ ] dataGray;
}
if(pImage->nChannels==3)
{
IplImage *IpImageRed, *IplImageGreen, *IplImageBlue;
IplImageRed=cvCreateImage(cvSize(pImage),IPL_DEPTH_8U,1);
IplImageGreen=cvCreateImage(cvSize(pImage),IPL_DEPTH_8U,1);
IplImageBlue=cvCreateImage(cvSize(pImage),IPL_DEPTH_8U,1);
cvSplit(pImage, pImageBlue, pImageGreen, pImageRed,NULL);
uchar* dataRed=new uchar[pImage->width*pImage->height];
uchar* dataGreen=new uchar[pImage->width*pImage->height];
uchar* dataBlue=new uchar[pImage->width*pImage->height];
int height=pImage->height;
int width=pImage->width;
for(int i=0; i {
memcpy(dataRed+width*i, pImageRed->imageData+pImageRed->widthStep*i,width);
memcpy(dataGreen+width*i, pImageGreen->imageData+pImageGreen->widthStep*i,width);
memcpy(dataBlue+width*i, pImageBlue->imageData+pImageBlue->widthStep*i,width);
}
gen_image3(&Hobj,"byte",pImage->width,pImage->height,(Hlong)(dataRed),(Hlong)(dataGreen),(Hlong)(dataBlue));
cvReleaseImage(&pImageRed);
cvReleaseImage(&pImageGreen);
cvReleaseImage(&pImageBlue);
delete[ ] dataRed;
delete[ ] dataGreen;
delete[ ] dataBlue;
}
return Hobj;
}

（3）、封装一个画图函数
void DrawPicToHDC(IplImage* img , UINT ID)
{
CDC* pdc=GetDlgItem(ID)->GetDC();
HDC hdc=pdc->GetSafeHdc();
CRect rect;
GetDlgItem(ID)->GetClientRect(&rect);
CvvImage vvimg;
vvimg.CopyOf(img);
vvimg.DrawToHDC(hdc , &rect);
ReleaseDC(pdc);
}

（4）、测试
新建一个MFC对话框项目，添加一个pic控件，ID为IDC_IMG，添加一个图片显示按钮ShowImg，双击按钮添加消息处理函数，如下
建立一个全局变量
IplImage* opencv_image;
void OnBnClickedShowimg()
{
Hobject Image;
read_image(&Image,"E:/.../1.jpg");
opencv_image=HImageToIplImage(Image);
DrawPicToHDC(opencv_image,IDC_IMG);
cvReleaseImage(&opencv_image);
}
如果没有语法输入错误，应该就没问题了，可以将Halcon的图片转换为Opencv的图片，然后画到pic控件上。需要的环境就是要附加上opencv库和halcon库，还要加上CvvImage.h和CvvImage.cpp两个文件。这样就OK啦！