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Machine translation
1. (WO1980001977) TECHNIQUE FOR ESTIMATION OF DISPLACEMENT AND/OR VELOCITY OF OBJECTS IN VIDEO SCENES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001977    International Application No.:    PCT/US1980/000178
Publication Date: 18.09.1980 International Filing Date: 25.02.1980
IPC:
G01S 11/12 (2006.01), H04N 7/26 (2006.01)
Applicants:
Inventors:
Priority Data:
21063 16.03.1979 US
Title (EN) TECHNIQUE FOR ESTIMATION OF DISPLACEMENT AND/OR VELOCITY OF OBJECTS IN VIDEO SCENES
(FR) TECHNIQUE D"ESTIMATION DU DEPLACEMENT ET/OU DE LA VITESSE D"OBJETS DANS DES SCENES VIDEO
Abstract: front page image
(EN)A technique for estimation of displacement and/or velocity of objects in television scenes is recursive, in that each displacement calculation is made using the results of the previous calculation. In a first embodiment, a displaced frame difference DFD (i.e., the intensity difference between a spatial location in the present video frame and a location in the previous frame displaced from that location by an initial displacement estimate) is updated using the initial value of DFD normalized by a measure of local picture activity. In a second embodiment, the update is a multiplicative function of DFD and the intensity gradient at the displaced location in the previous frame.
(FR)Une technique d"estimation du deplacement et/ou de la vitesse d"objets dans des scenes de television est recursive, en d"autres termes, chaque calcul de deplacement se fait en utilisant les resultats du calcul precedent. Dans un premier mode de realisation, une difference d"image deplacee DFD (c"est-a-dire, la difference d"intensite entre un point dans l"espace de l"image video actuelle et un point dans l"image anterieure deplacee de ce point d"une estimation de deplacement initiale) est mise a jour en utilisant la valeur initiale du DFD normalisee par une mesure d"activite locale d"images. Dans un second mode de realisation, la mise a jour est une fonction multiplicative du DFD et du gradient d"intensite au point deplace dans l"image anterieure.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)