Abstmct-The presence of repetitive patterns in the dcmain of stereo vision results in multiple matching hypotheses. Choosing t h e wrong hypothesis leads to an incorrect determination of objects and calculation of their distances. Especially in vision-hssed driver assistance and safety syst e m a high accuracy in matching and distance calculation is vital. One approach t o increase the r o h u s t n e s of matching is t o add a third camera t o t h e system. Another idea is t o resolve t h e ambiguities over time. In this paper we present a different solution without additional hardware expense: The shiny varnished hood of the ear provides a mirror which is in a fixed position relative t o t h e camer=. This mirror displays additional views of t h e scene, providing t h e required information. The cameras and t h e respective camera-mirror EYSt e m need t o he calibrated. T h e epipolar geometry and the disparity-distance function of the freeform surface mirror must be determined. After establishing this we e m obtain t h e correct matching hypothesis. Keyworda-stereo vision, matching reliability, catadioptric systems, f r e e f o r m surface mirrors Fig. 1. A traffic scene reflected in the hood of a car. The repetitiw patterns to the right lead to multiple matching hypotheses. The lower image part, showing the hood of the car, displays the required scene information to choose the correct match. Experiments have shownRRANGWG two cameras in a horizontal setup, that due to the grazing incidence angle wen with a soiled varnish
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.