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Page identification by detection of optical characteristics

  • US 5,900,943 A
  • Filed: 08/29/1997
  • Issued: 05/04/1999
  • Est. Priority Date: 08/29/1997
  • Status: Expired due to Term
First Claim
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1. In a page handling system that receives and distinguishes different pages, at least one page having a particular color associated therewith and adapted for having printed material thereon, a page identification system adapted to identify one page from amongst multiple pages according to the associated color, comprising:

  • a light source adapted to direct light onto at least one of the multiple pages;

    a light detector adapted to sense light from the at least one of the multiple pages, the light detector producing an electronic output representing detected light;

    a look-up table adapted to store color characteristics of at least one known page;

    a processor that compares detected light as represented by the electronic output with the color characteristics, to detect a match between the detected light and the color characteristics of a known page, and if a match is detected, that provides an electronic output identifying that the match has occurred; and

    means for learning new pages if a match is not detected, and for storing color characteristics of the new page in the look-up table such that the new page can be subsequently identified as a known page;

    wherein the page processing system may thereby distinguish and subsequently track at least one of the multiple pages based on color.

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