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Photosensor system and drive control method thereof

  • US 6,879,344 B1
  • Filed: 10/31/2000
  • Issued: 04/12/2005
  • Est. Priority Date: 11/08/1999
  • Status: Expired due to Fees
First Claim
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1. A photosensor system comprising:

  • a photosensor array including a plurality of photosensors in a two-dimensional array;

    image reading means for reading a subject image at a predetermined reading sensitivity by the photosensor array;

    pre-reading means for causing the subject image to be read by different regions of the photosensor array using different image reading sensitivities in a plurality of stages, prior to an image reading operation by the image reading means;

    optimal reading sensitivity extraction means for extracting an optimal image reading sensitivity suitable for the image reading operation based on a comparison of predetermined measurement amounts which relate to image patterns of the subject image read by said pre-reading means and which correspond to the different regions of the photosensor array; and

    reading sensitivity setting means for setting the optimal image reading sensitivity to a reading sensitivity of said image reading means.

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