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Image processing device estimating black character color and ground color according to character-area pixels classified into two classes

  • US 20040076337A1
  • Filed: 08/28/2003
  • Published: 04/22/2004
  • Est. Priority Date: 09/05/2002
  • Status: Active Grant
First Claim
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1. An image processing device comprising:

  • a character area extraction part extracting a character area from an original image that is a digital image;

    a class classification part classifying pixels belonging to said character area into a first class and a second class according to colors;

    a black-character-color/ground-color estimation part estimating a black character color and a ground color on said original image according to the pixels belonging to said character area being classified into said first class and said second class; and

    a tone correction part performing a tone correction to said original image according to the estimated black character color and the estimated ground color.

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