The problems that arise in forensic document examination, are usually quite different from that of traditional writer identification and verification tasks, where the data is assumed to be natural handwriting. However, in case of forensic documents no such assumption can be made about data. This give rise of problems of forgery and repudiation detection. The problem of forgery detection has been studied in the context of signature verification. The second problem, repudiation, arise where a writer deliberately distorts his handwriting in order to avoid identification. Moreover, in case of forensic documents, we often have to arrive at a decision based on a single document pair. Since the problem of repudiation is inherently different from that of writer identification or verification, the optimal way to handle them needs to be different. This paper addresses the problem of repudiation in generic handwritten documents, and also proposes a framework to analyze such documents. The a...
Sachin Gupta, Anoop M. Namboodiri