www.pudn.com > OpenCV-Intel.zip > cvadapthresh.cpp

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#include "_cv.h" 
 
static void 
icvAdaptiveThreshold_MeanC( const CvMat* src, CvMat* dst, int method, 
                            int maxValue, int type, int size, double delta ) 
{ 
    CvMat* mean = 0; 
     
    CV_FUNCNAME( "icvAdaptiveThreshold_MeanC" ); 
 
    __BEGIN__; 
 
    if( size <= 1 || (size&1) == 0 ) 
        CV_ERROR( CV_StsOutOfRange, "Neighborhood size must be >=3 and odd (3, 5, 7, ...)" ); 
 
    if( maxValue < 0 ) 
    { 
        CV_CALL( cvSetZero( dst )); 
        EXIT; 
    } 
 
    CV_CALL( mean=cvCreateMat( src->rows, src->cols, CV_8UC1 )); 
    CV_CALL( cvSmooth( src, mean, method == CV_ADAPTIVE_THRESH_MEAN_C ? 
                       CV_BLUR : CV_GAUSSIAN, size, size )); 
    CV_CALL( cvSubS( mean, cvRealScalar( delta ), mean )); 
    CV_CALL( cvCmp( src, mean, dst, type == CV_THRESH_BINARY ? CV_CMP_GT : CV_CMP_LT )); 
 
    if( maxValue < 255 ) 
        CV_CALL( cvAndS( dst, cvScalarAll( maxValue ), dst )); 
 
    __END__; 
 
    cvReleaseMat( &mean ); 
} 
 
 
CV_IMPL void 
cvAdaptiveThreshold( const void *srcIm, void *dstIm, double maxValue, 
                     int method, int type, int blockSize, double param1 ) 
{ 
    CvMat src_stub, dst_stub; 
    CvMat *src = 0, *dst = 0; 
 
    CV_FUNCNAME( "cvAdaptiveThreshold" ); 
 
    __BEGIN__; 
 
    if( type != CV_THRESH_BINARY && type != CV_THRESH_BINARY_INV ) 
        CV_ERROR( CV_StsBadArg, "Only CV_TRESH_BINARY and CV_THRESH_BINARY_INV " 
                                "threshold types are acceptable" ); 
 
    CV_CALL( src = cvGetMat( srcIm, &src_stub )); 
    CV_CALL( dst = cvGetMat( dstIm, &dst_stub )); 
 
    if( !CV_ARE_CNS_EQ( src, dst )) 
        CV_ERROR( CV_StsUnmatchedFormats, "" ); 
 
    if( CV_MAT_TYPE(dst->type) != CV_8UC1 ) 
        CV_ERROR( CV_StsUnsupportedFormat, "" ); 
 
    if( !CV_ARE_SIZES_EQ( src, dst ) ) 
        CV_ERROR( CV_StsUnmatchedSizes, "" ); 
 
    switch( method ) 
    { 
    case CV_ADAPTIVE_THRESH_MEAN_C: 
    case CV_ADAPTIVE_THRESH_GAUSSIAN_C: 
        CV_CALL( icvAdaptiveThreshold_MeanC( src, dst, method, cvRound(maxValue),type, 
                                             blockSize, param1 )); 
        break; 
    default: 
        CV_ERROR( CV_BADCOEF_ERR, "" ); 
    } 
 
    __END__; 
} 
 
/* End of file. */