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Image reading device, image reading apparatus, and method therefor

  • US 20010038466A1
  • Filed: 12/29/2000
  • Published: 11/08/2001
  • Est. Priority Date: 11/25/1996
  • Status: Active Grant
First Claim
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1. An image reading apparatus for reading an image of original, said apparatus comprising:

  • photoelectric conversion means for converting light from the original into an image signal;

    first correction means for correcting a white level of the image signal;

    storage means for storing white reference data for white level correction in correspondence with a reference temperature;

    detection means for detecting a temperature near said photoelectric conversion means; and

    second correction means for correcting the reference white data on the basis of a temperature difference between the temperature detected by said detection means and the reference temperature, wherein the white level is corrected by said first correction means using the white reference data corrected by said second correction means.

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