Autostereoscopic image acquisition method and system

H - Electricity – 04 – N

Patent

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Details

H04N 13/02 (2006.01) G02B 27/22 (2006.01) G03B 35/00 (2006.01) H04N 13/00 (2006.01) H04N 15/00 (2006.01)

Patent

CA 2222272

A method for the acquisition of simulated autostereoscopic video images of a scene to be displayed is disclosed. The method uses n simulated cameras, where n>/=3, each generating an image of a scene along a particular optical axis, on the basis of stored data comprising three-dimensional information. The optical axes of the simulated cameras converge on a point located at a constant distance (D) from the simulated cameras. The scene to be displayed includes a closest point (Pp) and a farthest point (Pe), and the distance (Dmin) between the simulated cameras and the closest point (Pp) as well as the distance (<u>b</u>) between adjacent cameras are selected in such a way that, for focusing between the closest point (Pp) and the farthest point (Pe), the angle (2 alpha ) between two adjacent simulated cameras varies between a value of at most 4.5 DEG for point Pp and a value of at least 0.2 DEG for point Pe.

L'invention concerne un procédé d'acquisition d'images vidéo autostéréoscopiques simulées d'une scène à visualiser. Il met en oeuvre, à partir de données mémorisées comportant des informations à trois dimensions n (avec n3) caméras simulées générant chacune une image d'une scène selon un axe optique donné. Les axes optiques des caméras simulées sont convergents en un point situé à une même distance D des caméras simulées. La scène à visualiser présente un point le plus proche Pp et un point le plus éloigné Pe, et on choisit d'une part la distance Dmin entre les caméras simulées et le point le plus proche Pp, et d'autre part la distance inter-caméras (<u>b</u>) de telle sorte que, pour une mise au point variant entre le point le plus proche Pp et le point le plus éloigné Pe, l'angle 2.alpha. entre deux caméras simulées adjacentes varie entre une valeur au plus égale à 4,5~ pour le point Pp et une valeur au moins égale à 0,2~ pour le point Pe.

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