The epipolar geometry of couples of omnidirectional sensors is often difficult to express analytically. We propose an algorithm to estimate numerically epipolar curves from omnidirectional pairs of stereovision. This algorithm is not limited to this type of sensors and works, for example, with a combination of a panoramic sensor and a traditional camera. Although the load of calculation necessary for this algorithm is heavy, it works with every kind of sensor (provided that the stereovision pair is completely calibrated) especially with sensor that do not respect the single viewpoint constraint.