/* external contour area function */
CV_IMPL double
cvContourArea( const void *array, CvSlice slice, int oriented )
{
double area = 0;
CvContour contour_header;
CvSeq* contour = 0;
CvSeqBlock block;
if( CV_IS_SEQ( array ))
{
contour = (CvSeq*)array;
if( !CV_IS_SEQ_POLYLINE( contour ))
CV_Error( CV_StsBadArg, "Unsupported sequence type" );
}
else
{
contour = cvPointSeqFromMat( CV_SEQ_KIND_CURVE, array, &contour_header, &block );
}
if( cvSliceLength( slice, contour ) == contour->total )
{
cv::AutoBuffer<double> abuf;
cv::Mat points = cv::cvarrToMat(contour, false, false, 0, &abuf);
return cv::contourArea( points, oriented !=0 );
}
if( CV_SEQ_ELTYPE( contour ) != CV_32SC2 )
CV_Error( CV_StsUnsupportedFormat,
"Only curves with integer coordinates are supported in case of contour slice" );
area = icvContourSecArea( contour, slice );
return oriented ? area : fabs(area);
}
/* external contour area function */
CV_IMPL double
cvContourArea( const void *array, CvSlice slice, int oriented )
{
double area = 0;
CvContour contour_header;
CvSeq* contour = 0;
CvSeqBlock block;
if( CV_IS_SEQ( array ))
{
contour = (CvSeq*)array;
if( !CV_IS_SEQ_POLYLINE( contour ))
CV_Error( CV_StsBadArg, "Unsupported sequence type" );
}
else
{
contour = cvPointSeqFromMat( CV_SEQ_KIND_CURVE, array, &contour_header, &block );
}
if( cvSliceLength( slice, contour ) == contour->total )
{
IPPI_CALL( icvContourArea( contour, &area ));
}
else
{
if( CV_SEQ_ELTYPE( contour ) != CV_32SC2 )
CV_Error( CV_StsUnsupportedFormat,
"Only curves with integer coordinates are supported in case of contour slice" );
IPPI_CALL( icvContourSecArea( contour, slice, &area ));
}
return oriented ? area : fabs(area);
}