skip navigation

Add your conference to our Justice Events calendar


Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Library collection. To conduct further searches of the collection, visit the NCJRS Abstracts Database. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

  NCJ Number: NCJ 241743   Add to Shopping cart   Find in a Library
  Title: Statistical Examination of Handwriting Characteristics Using Automated Tools
  Document URL: PDF 
  Author(s): Sargur N. Srihari
  Date Published: 02/2013
  Page Count: 85
  Annotation: This report presents the results of research aimed at developing new statistical methods and software tools for examining handwriting characteristics.
  Abstract: This report presents the results of research aimed at developing new statistical methods and software tools for examining handwriting characteristics. The research consisted of six goals: 1) develop methods to extract samples of commonly encountered letter forms from extended handwriting samples of typical writers in the United States, 2) prepare the appropriate format to present the samples to QD (questioned document) examiners who would then enter perceived characteristics with a user interface, 3i) determine the frequency of occurrence of combinations of handwriting characteristics, 4) use those frequencies to construct a probabilistic model without the method being overwhelmed by the combinatorial possibilities and sample requirements, 5) develop methods to infer the probability of evidence from the model, and 6) indicate where such methods could be used in the QD examiner's work-flow. The project’s tasks were divided into four parts, and are presented in that format in this report: data preparation, model construction, inference, and QD work-flow. Several conclusions were reached as a result of this project. These conclusions include 1) statistical characterization of handwriting characteristics can be useful to assist the QD examiner in the examination of handwritten items; 2) since probability distributions of handwriting characteristics involve too many parameters, the complexity can be handled using probabilistic graphical models (PGMs); 3) PGMs can be used to determine the rarity of given characteristics; 4) software interfaces for creating databases of handwriting characteristics for different commonly occurring letter combinations have been developed, 5) an automatic method for determining handwriting type was introduced, with a 92 percent accuracy, and 6) statistical methods can be used in the work-flow of the forensic document examiner. Implications for policy and practice are discussed. Tables, figures, algorithms, appendixes, and references
  Main Term(s): Handwriting analysis
  Index Term(s): Document analysis ; Evidence identification and analysis ; Analysis ; Forensics/Forensic Sciences ; Automated crime analysis ; NIJ grant-related documents
  Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
  Grant Number: 2010-DN-BX-K037
  Sale Source: NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
  Type: Research (Applied/Empirical)
  Country: United States of America
  Language: English
  To cite this abstract, use the following link:

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.