OpenCV中cvLoadImage()怎么用

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CV_IMPL IplImage*cvLoadImage( const char* filename, int iscolor ){    return (IplImage*)cv::imread_(filename, iscolor, cv::LOAD_IMAGE );}

调用成员函数imread_()， 该函数原型如下：

enum { LOAD_CVMAT=0, LOAD_IMAGE=1, LOAD_MAT=2 };static void*imread_( const string& filename, int flags, int hdrtype, Mat* mat=0 ){        IplImage* image = 0;        CvMat *matrix = 0;        Mat temp, *data = &temp;        ImageDecoder decoder = findDecoder(filename);        if( decoder.empty() )                return 0;        decoder->setSource(filename);        if( !decoder->readHeader() )                return 0;        CvSize size;        size.width = decoder->width();        size.height = decoder->height();        int type = decoder->type();        if( flags != -1 )        {                if( (flags & CV_LOAD_IMAGE_ANYDEPTH) == 0 )                        type = CV_MAKETYPE(CV_8U, CV_MAT_CN(type));                if( (flags & CV_LOAD_IMAGE_COLOR) != 0 ||                        ((flags & CV_LOAD_IMAGE_ANYCOLOR) != 0 && CV_MAT_CN(type) > 1) )                        type = CV_MAKETYPE(CV_MAT_DEPTH(type), 3);                else                        type = CV_MAKETYPE(CV_MAT_DEPTH(type), 1);        }        if( hdrtype == LOAD_CVMAT || hdrtype == LOAD_MAT )        {                if( hdrtype == LOAD_CVMAT )                {                        matrix = cvCreateMat( size.height, size.width, type );                        temp = cvarrToMat(matrix);                }                else                {                        mat->create( size.height, size.width, type );                        data = mat;                }        }        else        {                image = cvCreateImage( size, cvIplDepth(type), CV_MAT_CN(type) );                temp = cvarrToMat(image);        }        if( !decoder->readData( *data ))        {                cvReleaseImage( &image );                cvReleaseMat( &matrix );                if( mat )                        mat->release();                return 0;        }        return hdrtype == LOAD_CVMAT ? (void*)matrix :                hdrtype == LOAD_IMAGE ? (void*)image : (void*)mat;}

此外，还有另外一个版本的cvLoadImageM()：

CV_IMPL CvMat*cvLoadImageM( const char* filename, int iscolor ){    return (CvMat*)cv::imread_( filename, iscolor, cv::LOAD_CVMAT );}

而imread_()还有另外一个版本的函数：

Mat imread( const string& filename, int flags ){    Mat img;    imread_( filename, flags, LOAD_MAT, &img );    return img;}

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