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Image pickup device

  • US 20080136943A1
  • Filed: 12/21/2007
  • Published: 06/12/2008
  • Est. Priority Date: 06/07/2005
  • Status: Active Grant
First Claim
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1. An image pickup device comprising:

  • an optical system having a distortion characteristic, the optical system capturing an optical image of an object, the distortion characteristic magnifying a center portion of the optical image and reducing a peripheral portion of the optical image;

    an image sensor that converts the optical image into image data;

    a frame memory that stores the image data;

    a frame memory output control unit that reads a first selected portion of the image data out of the frame memory, the first selected portion being defined by an angle of view, the angle of view being externally defined;

    a first filter unit that applies a first filtering process to a second selected portion of the image data to generate first-filtered image data, the second selected portion being included in the first selected portion, the second selected portion having a first range of distortion that is smaller than a first threshold value;

    a distortion correction unit that performs a distortion correction of the first-filtered image data to generate distortion-corrected image data; and

    a second filter unit that applies a second filtering process to a third portion of the distortion-corrected image data to generate second-filtered image data, the second filtering process being different from the first filtering process, the third selected portion having a second range of distortion that is greater than a second threshold value.

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