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Self Editing Signature Comparator

IP.com Disclosure Number: IPCOM000083460D
Original Publication Date: 1975-May-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Baker, CT: AUTHOR

Abstract

Most signatures consist of more than one component. For example, the signature in Fig. 1, Charles T. Baker, Jr., consists of 10 components as shown in Fig. 2:

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Self Editing Signature Comparator

Most signatures consist of more than one component. For example, the signature in Fig. 1, Charles T. Baker, Jr., consists of 10 components as shown in Fig. 2:

Some components contain more extrema than other components. In the example above, the y(+) function for component number one will contain substantially fewer y extrema. Similar considerations prevail for the x extrema.

Exploratory tests show that the pen-down, on-paper data are more repeatable than the pen-up, off-paper data. Furthermore, from a pragmatic viewpoint, it is important to avoid the processing of data that is of no value or is of marginal value for making signature comparisons.

A means for selecting the signature component that is of the greatest value for the comparator is based upon the pen-down, on-paper, recording times of signature components. Either the absolute values of times is used or these component recording times are normalized by dividing each pen-down, on-paper component recording time, by the total of all of the pen-down component recording times for the entire signature.

Components of a signature are separated into major components and minor components, based upon the recording time for each component. This separation is made by comparing each component recording time with a threshold time, which is associated with each individual's signature. If the component recording time is greater than the threshold time, the component is identified as a major component. If the co...