solve_for_sign    303 modules/calib3d/src/epnp.cpp   solve_for_sign();
solve_for_sign     48 modules/calib3d/src/epnp.h   void solve_for_sign(void);
solve_for_sign    238 modules/calib3d/src/upnp.cpp   solve_for_sign();
solve_for_sign     92 modules/calib3d/src/upnp.h       void solve_for_sign(void);