Off-line signature verification using DTW

Authors:
A. Piyush Shanker;A. N. Rajagopalan
Affiliations:
Image Processing and Computer Vision Lab, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India;Image Processing and Computer Vision Lab, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
Venue:
Pattern Recognition Letters
Year:
2007

Citing 4
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Abstract

In this paper, we propose a signature verification system based on Dynamic Time Warping (DTW). The method works by extracting the vertical projection feature from signature images and by comparing reference and probe feature templates using elastic matching. Modifications are made to the basic DTW algorithm to account for the stability of the various components of a signature. The basic DTW and the modified DTW methods are tested on a signature database of 100 people. The modified DTW algorithm, which incorporates stability, has an equal-error-rate of only 2% in comparison to 29% for the basic DTW method.