Camera-based touch system

G - Physics – 06 – F

Patent

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Details

G06F 3/033 (2006.01)

Patent

CA 2412878

A camera-based touch system (50) includes a passive touch surface (60) and at least two cameras (63) associated with the touch surface. The at least two cameras (63) have overlapping fields of view (FOV) encompassing the touch surface. The at least two cameras (63) acquire images of the touch surface from different locations and generate image data. A processor (54) receives and processes image data generated by the at least two cameras to determine the location of the pointer relative to the touch surface when the pointer is captured in images acquired by the at least two cameras. Actual pointer contact with the touch surface and pointer hover above the touch surface can be determined.

La présente invention concerne un système tactile à caméra (50) comprenant une surface tactile passive (60) et au moins deux caméras (63) associées à la surface tactile. Les deux caméras (63) présentent des angles de champ chevauchants couvrant la surface tactile. Les deux caméras (63) prennent des images de la surface tactile à partir de différents endroits et produisent des données images. Un processeur (54) reçoit et traite des données d'images produites par les deux caméras pour déterminer la position du pointeur par rapport à la surface tactile lorsque le pointeur est saisi dans les images prises par les caméras. Par ailleurs, on peut déterminer le contact actuel du pointeur avec la surface tactile et le vol du pointeur au-dessus de la surface tactile.

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