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Apparatus and method for correction of a deviation of digital camera

  • US 6,686,954 B1
  • Filed: 06/22/1999
  • Issued: 02/03/2004
  • Est. Priority Date: 06/26/1998
  • Status: Expired due to Fees
First Claim
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1. An apparatus for correcting a deviation of an imaging sensor of a digital camera in which an image of an object or a scene is formed on an image plane of the imaging sensor so that the imaging sensor outputs an image signal, comprising:

  • a rotation detecting unit which detects a quantity of rotation of the digital camera causing a deviation of the imaging sensor from a reference position to occur, the rotation detecting unit including an acceleration sensor outputting a signal indicative of an acceleration of the digital camera and a magnetic sensor outputting a signal indicative of a magnetic field of the digital camera;

    a positional angle calculating unit which calculates a change of a positional angle of the imaging sensor based on the rotation quantity detected by the rotation detecting unit;

    a target vector calculating unit which calculates a target vector based on the positional angle change calculated by the positional angle calculating unit, the target vector describing a magnitude and a direction of an inverse movement of the imaging sensor needed to reach the reference position and cancel the deviation; and

    a movement control unit which controls movement of the imaging sensor based on the target vector calculated by the target vector calculating unit, so that the imaging sensor is moved back to the reference position thus correcting the deviation, wherein the calculation of the target vector and the movement of the imaging sensor are executed within an image acquisition time for a single frame of the image signal.

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