Automatic tracking camera control system

H - Electricity – 04 – N

Patent

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Details

H04N 5/232 (2006.01) G01S 3/786 (2006.01) G08B 13/196 (2006.01) H04N 7/15 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2148231

Methodology and circuitry for automatically effecting electronic camera movement to track and display the location of a moving object, such as a person presenting a talk to an audience. A fixed spotting camera (110) is used to capture a field of view, and a moving tracking camera (120) with pan/tilt/zoom/focus functions is driven (controller 520) to the present location of the moving object. Information for driving the tracking camera is obtained with reference to the pixel difference between a current image (300) and a previous image (200) within the field of view. A tracking algorithm computes the information necessary to drive the tracking camera from these pixel differences as well as data relative to the field of view of the spotting camera and the present tracking camera position.

Voici la méthodologie et la circuiterie de commande automatique des mouvements d'une caméra électronique permettant de suivre et d'afficher la position d'un corps en mouvement, comme une personne présentant un exposé devant un auditoire. Une caméra d'observation fixe (110) sert à capter l'angle du champ, et une caméra de poursuite mobile (120) ayant les fonctions de panoramique horizontal/panoramique vertical/zoom/mise au point est commandée (contrôleur 520) d'aller à la position actuelle du corps en mouvement. L'information de commande de la caméra de poursuite est obtenue par voie de référence à la différence de pixels entre l'image actuelle (300) et l'image précédente (200) dans l'angle du champ. Un algorithme de poursuite calcule l'information nécessaire pour commander la caméra de poursuite en utilisant ces différences de pixels, ainsi que des données relatives à l'angle du champ de la caméra d'observation et à la position actuelle de la caméra de pousuite.

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