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Determining a final exposure setting automatically for a solid state camera without a separate light metering circuit

  • US 20030122939A1
  • Filed: 11/25/2002
  • Published: 07/03/2003
  • Est. Priority Date: 04/20/1999
  • Status: Active Grant
First Claim
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1. (Twice Amended) A method for generating an exposure setting, comprising:

  • a) selecting one of a plurality of predetermined exposure settings as a current exposure setting for a solid state camera having a camera imager;

    b) generating a captured scene by the camera imager using the current exposure setting;

    c) selecting according to an automated search methodology another one of the exposure settings to be the current setting in response to the captured scene being underexposed or overexposed; and

    d) repeating b) and c) until the captured scene is neither underexposed or overexposed, wherein the search methodology performs a coarse granularity search so long as the captured scene is either grossly overexposed or grossly underexposed, and then changes to a fine granularity search if the captured scene is still overexposed or underexposed but not grossly so.

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