Abstract:
Because the epipolar geometr y model estimation of panoramic images is unstable under the low match inlier ratio caseslar ge numbers of outliers or errors cannot be detected using RANSAC method.A new gross error detection method based on multiple constraints is presented for vehicleborne panoramic image se quences.Firstthe initial matching points are extracted using SIFT and nearest nei ghbor matchingthen inde pendent random matching points are constructed by redundant gross error constraints.Secondthe movement relationshi ps between panoramic images are approximatel y expressed by the histo gram statistics of optical flow magnitude and direction which can effectivel y improve the matching inlier ratio.Finall ythe epipolar geometric constraintscale constraint and sky point constraint are used for gross error detection.Several panoramic images were selected and used for experiments.An anal ysis and comparison were carried out on these data.The results show that the proposed method works well in short-baseline conditions for the number and accurac y of correct matching pointses peciall y for complex scenes in low inlier ratio cases.The al gorithm performance is relativel y stableand provides better constraint for gross errors usuall y caused by re peated textures scale changesand moving objects.