OpenCv:IplImage，Mat和Qt:QImage之间的快速转换

//QImage->IplImage *
static IplImage *ConvertToIplImage( const QImage &img)
{
   int nChannel=0;
   if (img.format()==QImage::Format_RGB888)nChannel=3;
   if (img.format()==QImage::Format_ARGB32)nChannel=4;
   if ( nChannel==0 ) return false ;

   IplImage *iplImg=cvCreateImageHeader( cvSize(img.width(), img.height()),8,nChannel );
   iplImg->imageData=( char *)img.bits();

   if (nChannel==3)
       cvConvertImage(iplImg,iplImg,CV_CVTIMG_SWAP_RB);

   return iplImg;
}

//Mat->QImage
static QImage ConvertToQImage(cv::Mat &mat)
{
   QImage img;
   int nChannel=mat.channels();
   if (nChannel==3)
   {
       cv::cvtColor(mat,mat,CV_BGR2RGB);
       img = QImage(( const unsigned char *)mat.data,mat.cols,mat.rows,QImage::Format_RGB888);
   }
   else if (nChannel==4||nChannel==1)
   {
       img = QImage(( const unsigned char *)mat.data,mat.cols,mat.rows,QImage::Format_ARGB32);
   }

   return img;
}

//IplImage *->QImage
static QImage ConvertToQImage(IplImage *iplImg)
{
   QImage img;
   int nChannel=iplImg->nChannels;
   if (nChannel==3)
   {
       cvConvertImage(iplImg,iplImg,CV_CVTIMG_SWAP_RB);
       img = QImage(( const unsigned char *)iplImg->imageData,iplImg->width,iplImg->height,QImage::Format_RGB888);
   }
   else if (nChannel==4||nChannel==1)
   {
       img = QImage(( const unsigned char *)iplImg->imageData,iplImg->width,iplImg->height,QImage::Format_ARGB32);
   }

   return img;
}


http://my.csdn.net/haisa88/code/detail/33688