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Adaptive lighting control for vision-based occupant sensing

  • US 20050184217A1
  • Filed: 02/23/2004
  • Published: 08/25/2005
  • Est. Priority Date: 02/23/2004
  • Status: Active Grant
First Claim
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1. An object surface characterization system with adaptive lighting control, the system comprising:

  • a light projector;

    a light source;

    a camera;

    a processor coupled to the light projector, the light source and the camera; and

    a memory subsystem coupled to the processor, the memory subsystem storing code that when executed by the processor instructs the processor to perform the steps of;

    controlling the light projector to selectively provide a plurality of light beams arranged in a beam matrix of rows and columns, wherein the light beams impinge on a surface of a target and are reflected from the surface of the target;

    controlling the light source to selectively illuminate the surface of the target;

    directing the camera to capture a first image frame and a second image frame, wherein the first image frame includes contributions provided by the light source and the plurality of light beams of the beam matrix after reflection from the surface of the target, and wherein the second image frame include contributions provided by the light source after reflection from the surface of the target;

    examining at least a portion of the first and second image frames to provide an indication of the intensities of the plurality of light beams and the light source; and

    controlling a camera integration time of the camera and a pulse width of the light source based upon the intensities of the plurality of light beams and the light source to achieve a desired target illumination.

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