Patent · US Active

Method of effacing zipper image

US7710612B2 · kind B2 · utility

0Cited by
51References
19Claims
0Family size

Inventor

Key dates

Filing dateJan 17, 2006
Grant dateMay 4, 2010
Priority date—
Expiry dateOct 20, 2028

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N1/193
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

A method of effacing zipper image, applicable to scan a document by a scanner with a stagger charge-coupled device. The nth (n is a positive integer) pixel value obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel value obtained by scan on the scan line. The absolute value of the result is then compared to a critical value. If the result is smaller than the critical value, the nth pixel is modified by the method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.