How to use the () operator of mser of opencv

Question

I am using opencv MSER class, cannot compile a use of () operator. I am not a c++ expert, so post question here, hope somebody can help.

MSER class is defined including a () operator:

class CV_EXPORTS_W MSER : public CvMSERParams
{
public:
   ...
    void operator()( const Mat& image,
    CV_OUT vector<vector<Point> >& msers, const Mat& mask ) const;
};

The code snippet to use MSER class:

Mat yuv;
vector<vector<Point> > contours;
cv::MSER mser;
mser(yuv, contours, cv::Mat());

at the mser() line, xcode give me this error:

No matching function for call to object of type 'cv::MSER'

The () operator makes MSER a *functor*. But I think that your problem is simply some wrong/missing headers — Sam, Jul 20 '12 at 20:49
As other functions in this file use opencv correctly, I suppose the opencv header files are correctly included. — yorkdu, Jul 20 '12 at 21:00

willtalmadge · Accepted Answer · 2013-07-01T02:29:15.517

2

The problem is with this line

vector<vector<Point> > contours;

Change it to

vector<vector<cv::Point> > contours;

The problem is that there is already a Point defined in the Cocoa frameworks, so the compiler is looking for a version of the operator that doesn't exist.

edited Jul 01 '13 at 02:29

answered May 24 '13 at 21:56

willtalmadge

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How to use the () operator of mser of opencv

1 Answers1