Document scanner having replaceable backing and automatic selection of registration parameters

US6744536B2 · kind B2 · utility

Assignee

• Xerox Corporation · US

Inventors

• Wayne A. Buchar · New York, US
• Ramesh Nagarajan · Pittsford, US
• Ralph H. Huedepohl · New York, US
• Wooi Yeoh · Rochester, US
• Robert P. Herloski · Webster, US
• Thomas C. McGraw · Macedon, US
• William M. Harney · Rochester, US
• Jeffrey L. Baniak · Penfield, US

Key dates

• Filing date: Jan 22, 2001
• Grant date: Jun 1, 2004
• Expiry date: Dec 20, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N2201/044
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A system and method for determining the registration parameters necessary for registration or edge detection processing to enable the flexibility of changing the color of backing to suit a given application. The method includes scanning the backing surface to obtain at least two sets of gray level values; (b) determining an average gray level for each of the two color channels; (c) selecting a registration channel based on the average gray level; (d) determining a gray level deviation for the registration channel; and (e) determining registration parameters based on the average gray level and the gray level deviation of the registration channel.