Developments in Handwriting and Signature Identification in by Heidi H. Harralson

By Heidi H. Harralson

The exam of handwriting and signatures has an extended and demonstrated heritage as a forensic self-discipline. With the development of expertise within the use of electronic capsules for signature seize, adjustments in handwriting exam are helpful. different adjustments in handwriting, corresponding to in raise in published writing kinds and the reduce in handwriting education in faculties necessitates a re-assessment of forensic handwriting identity difficulties. this article takes a clean and glossy examine handwriting exam because it relates to forensic, felony, and felony justice applications.

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This is not to say that biometrics is without problems of security and identification. There are drawbacks to some forms of biometrics, especially physiological biometrics that identify finger or hand prints, iris, or DNA. KeCrypt Systems Ltd. (2012) reports how a head cold can cause a false negative in an iris scan, while a latent print can be lifted and used for a fingerprint to gain access. Other biometrics such as gait, voice, and handwriting are behavioral and subject to variability, but cannot be exactly replicated.

Software systems record the material at a specific rate in hertz. This approach to recording movement is possible because handwriting is a cyclic, time-based movement showing peaks at specific frequencies. The handwriting recording can therefore be described completely in frequency waves. This allows for scientific study and measurement based on the dynamic movement of the handwriting in addition to the static, form-based trace written on paper (Fig. 2). 1 HANDWRITING AND MOVEMENT DISORDERS There has been considerable experimental research on the effects of motor disorders on handwriting and on graphic exercises such as spirals and repetitive letter patterns.

Harralson of exemplars demonstrating the writer’s day-to-day variation, possible deterioration, and/or medical treatment. This is complicated by patients who, because their handwriting lacks fluency, are not particularly inclined to write because it is too difficult or they are embarrassed. Medical research offers information about motor system individualization and disorder as these are manifested in the static handwriting trace. The research indicates that differential analysis between PD and ET based on qualitative observations of handwriting is possible in some cases.

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