206     void detect(InputArray _image, OutputArray _lines,
217     void drawSegments(InputOutputArray _image, InputArray lines);
229 …ments(const Size& size, InputArray lines1, InputArray lines2, InputOutputArray _image = noArray());
412 void LineSegmentDetectorImpl::detect(InputArray _image, OutputArray _lines,  in detect()  argument
415     Mat_<double> img = _image.getMat();  in detect()
1155 void LineSegmentDetectorImpl::drawSegments(InputOutputArray _image, InputArray lines)  in drawSegments()  argument
1157     CV_Assert(!_image.empty() && (_image.channels() == 1 || _image.channels() == 3));  in drawSegments()
1160     if (_image.channels() == 1)  in drawSegments()
1162         gray = _image.getMatRef();  in drawSegments()
1164     else if (_image.channels() == 3)  in drawSegments()
1166         cvtColor(_image, gray, CV_BGR2GRAY);  in drawSegments()
1175     merge(planes, _image);  in drawSegments()
1187         line(_image.getMatRef(), b, e, Scalar(0, 0, 255), 1);  in drawSegments()
1192 …l::compareSegments(const Size& size, InputArray lines1, InputArray lines2, InputOutputArray _image)  in compareSegments()  argument
1195     if (_image.needed() && _image.size() != size) sz = _image.size();  in compareSegments()
1227     if (_image.needed())  in compareSegments()
1229         CV_Assert(_image.channels() == 3);  in compareSegments()
1230         Mat img = _image.getMatRef();  in compareSegments()