×

Detection of highlighted regions

  • US 5,272,764 A
  • Filed: 08/28/1991
  • Issued: 12/21/1993
  • Est. Priority Date: 12/08/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of copying a document, said document comprising first colored regions and second text regions comprising the steps of:

  • a) identifying a location of said colored regions, said step of identifying further comprising the steps of;

    i) inputting a grayscale image of said document;

    ii) bandpass thresholding said grayscale image of said document to produce a first intermediate image;

    iii) opening said first intermediate image to produce a second intermediate image; and

    iv) growing said second intermediate image into a mask to produce a color region image; and

    b) copying said color region image in a first format and remaining portions in a second format.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×