CAMERA-BASED MULTI-TOUCH INTERACTION AND ILLUMINATION SYSTEM AND METHOD
First Claim
1. A camera-based multi-touch interaction system for determining a position and/or a posture of at least one object in front of an interaction surface, wherein said system includes:
- an illuminant arrangement for generating one or more planar fan-shaped light beams of visible and/or near-infrared light radiation;
a camera arrangement for sensing the interaction volume within a field-of-view of the camera arrangement to generate corresponding signals;
a computational unit for computing the position and/or the posture of the at least one object intercepting the one or more planar fan-shaped light beams based on the signals provided from the camera arrangement,whereinthe one or more fan-shaped light beams are formed in operation so that their planes are substantially parallel to the interaction surface; and
the one or more fan-shaped light beams are focused in a direction substantially perpendicular to a plane of the interaction surface so that the one or more fan-shaped beams have a substantially constant thickness in said direction, for enhancing the light intensity and increase the accuracy of position determination of the at least one object provided by the system.
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Accused Products
Abstract
A method, system and apparatus is provided for controlling and interacting within an interaction volume and/or surface of a computer. The method, apparatus and system is optionally employed together with, or even be integrated into, data projectors of all types and its fixtures/stands, and used together with flat screens (LCD, plasma, OLED, rear-projection screen and so forth) to render such display systems interactive. The apparatus incorporates a camera covering the interaction area from either a very short distance or from a larger distance to determine the lateral positions (X, Y) and even capturing the pose of the finger(s), hand(s) or other interacting object(s), which optionally include the determination of “touch” and “hovering”.
27 Citations
25 Claims
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1. A camera-based multi-touch interaction system for determining a position and/or a posture of at least one object in front of an interaction surface, wherein said system includes:
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an illuminant arrangement for generating one or more planar fan-shaped light beams of visible and/or near-infrared light radiation; a camera arrangement for sensing the interaction volume within a field-of-view of the camera arrangement to generate corresponding signals; a computational unit for computing the position and/or the posture of the at least one object intercepting the one or more planar fan-shaped light beams based on the signals provided from the camera arrangement, wherein the one or more fan-shaped light beams are formed in operation so that their planes are substantially parallel to the interaction surface; and the one or more fan-shaped light beams are focused in a direction substantially perpendicular to a plane of the interaction surface so that the one or more fan-shaped beams have a substantially constant thickness in said direction, for enhancing the light intensity and increase the accuracy of position determination of the at least one object provided by the system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of employing a camera-based multi-touch interaction system for determining a position and/or a posture of at least one object in front of an interaction surface, wherein said system includes:
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an illuminant arrangement for generating one or more planar fan-shaped light beams of visible and/or near-infrared light radiation; a camera arrangement for sensing the interaction surface within the camera'"'"'s field-of-view to generate corresponding signals; a computational unit for computing the position and/or the posture of the at least one object intercepting the one or more planar fan-shaped light beams based on the signals provided from the camera arrangement, wherein said method includes; forming the one or more fan-shaped light beams in operation so that their planes are substantially parallel to the interaction surface and focusing the one or more fan-shaped light beams in a direction substantially perpendicular to a plane of the interaction surface so that the one or more fan-shaped beams have a substantially constant thickness relative to an orthogonal to the plane of the interaction surface for enhancing the light intensity and increase the accuracy of position determination of the at least one object provided by the system.
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Specification