Method for verification of signatures and handwriting based on comparison of extracted features

US5995953A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Klaus Rindtorff · Holzgerlingen, DE
• Volker Rudolph

Key dates

• Filing date: Jul 16, 1997
• Grant date: Nov 30, 1999
• Expiry date: Jul 16, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G06V40/30
• WIPO field: Control
• WIPO sector: Instruments

Abstract

This invention describes a technology to improve the feature based comparison of images. The images are captured and their significant features are extracted. For a comparison only the feature values have to be compared instead of the images themselves. This leads to a significant reduction of storage space and calculation time needed. The reliability of the comparison is improved greatly by including also the individual variation ranges of the feature values and using a specialized neural net for classification.