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Image data processing circuit and image data processing method

  • US 20070139539A1
  • Filed: 03/22/2006
  • Published: 06/21/2007
  • Est. Priority Date: 12/16/2005
  • Status: Active Grant
First Claim
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1. An image data processing circuit of a solid state image pickup device from which a dark current component signal and a pixel signal are sequentially output on a line unit basis, comprising:

  • a first holding circuit for holding the dark current component signal in a reference line as a reference dark current component signal;

    a first subtraction circuit to which the dark current component signal and the pixel signal are sequentially entered on the line unit basis; and

    a differential circuit for obtaining, as a dark current change amount, a change amount with respect to the reference dark current component signal, of the dark current component signal included in a preceding line output from the solid state image pickup device prior to the line entered to the first subtraction circuit, wherein the first subtraction circuit subtracts the dark current change amount from the dark current component signal and the pixel signal which are entered.

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