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Combined optical and digital zoom

  • US 20040189830A1
  • Filed: 03/22/2004
  • Published: 09/30/2004
  • Est. Priority Date: 03/29/2003
  • Status: Active Grant
First Claim
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1. Zoom apparatus for digital image processing comprising:

  • an optical zoom lens arranged to provide an image across a continuous zoom range;

    an image sensor arranged to receive an image from the optical zoom lens and to provide a digital representation of the image; and

    digital zoom apparatus arranged to apply (a) one of at least two discrete zoom levels to the digital representation of the image such that the total apparent zoom level is the product of the discrete digital zoom level and the optical zoom level, and (b) digital interpolation to the digital representation of the image during a transition period between discrete zoom levels.

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