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Method for Control of a Device

  • US 20080188959A1
  • Filed: 05/24/2006
  • Published: 08/07/2008
  • Est. Priority Date: 05/31/2005
  • Status: Active Grant
First Claim
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1. A method for control of a device (D1, D2), which method comprises the steps of:

  • aiming a pointing device (1) comprising a camera (2) and a source (3) of invisible light in the direction of an object (O1, O2, O3) associated with the device (D1, D2) to be controlled, upon which or in which object (O1, O2, O3) a number of retro-reflective marker elements (M1, M2, M3, . . . , M11) are positioned, which retro-reflective marker elements (M1, M2, M3, . . . , M11) reflects at least part of the invisible light emitted by the light source (2) back to the pointing device (1);

    generating a first image (IA) of a target area (A) aimed at by the pointing device (1) whereby the light source (3) is inactive;

    generating a second image (IB) of the target area (A) aimed at by the pointing device (1) whereby, at least during part of an exposure time for generating the second image (IB), invisible light is emitted by the light source (3) in the direction (P) of pointing;

    processing the target area images (IA, IB) to determine the presence of retro-reflective marker elements (M1, M2, M3, . . . , M11);

    using information pertaining to the retro-reflective marker elements (M1, M2, M3, . . . , M11) to identify of the device (D1, D2) to be controlled and/or to determine a control signal (CS1, CS2) for the identified device (D1, D2).

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