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Camera exposure optimization techniques that take camera and scene motion into account

  • US 7,546,026 B2
  • Filed: 10/25/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 10/25/2005
  • Status: Expired due to Fees
First Claim
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1. A method of operating an electronic imaging device as a camera, comprising:

  • repetitively acquiring data of two or more images of a scene,calculating at least one quantity of motion of at least a portion of the scene relative to the camera from the acquired data of said two or more images such that the quantity of relative motion is independent of another quantity of total motion that is determined along each directional vector and which is calculated separately from a vector for acquiring data from at least the portion of the scene, and wherein the separate calculation of each directional vector further provides a velocity and an acceleration of the total motion;

    preliminarily setting, from luminescence information within the data of said two or more images, parameters including a duration for capturing data of a final image of the scene without regard to the at least one quantity of relative motion;

    in response to said at least one quantity of relative motion being below a first threshold, adjusting the preliminarily set parameters by at least increasing the duration of exposure;

    in response to said at least one quantity of relative motion being above a second threshold, adjusting the preliminarily set parameters by decreasing at least the duration of exposure; and

    thereafter capturing data of the final image of the scene by use of the adjusted duration and at least one other adjusted exposure parameter selected from a group comprising aperture size and gain.

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