CvContourEx      1665 modules/calib3d/src/calibinit.cpp     CvContourEx* board = 0;
CvContourEx      1679 modules/calib3d/src/calibinit.cpp     scanner = cvStartFindContours( image, temp_storage, sizeof(CvContourEx),
CvContourEx      1741 modules/calib3d/src/calibinit.cpp                     CvContourEx* parent = (CvContourEx*)(src_contour->v_prev);