Open Access Research Article Saran et al., J Forensic Res 2013, 4:5 DOI: 10.4172/2157-7145.1000204 Volume 4 • Issue 5 • 1000204 J Forensic Res ISSN: 2157-7145 JFR, an open access journal Differentiation of Handedness of Writer Based on their Strokes and Characteristic Features Vaibhav Saran*, Suneet Kumar, Gupta AK and Syeed Ahmad Department of Forensic Science, SHIATS, Allahabad, India *Corresponding author: Vaibhav Saran, Department of Forensic Science, SHIATS, Allahabad, Uttar Pradesh 211007, India, Tel: +915322684012; E-mail: dr.vaibhavsaran@gmail.com Received August 27, 2013; Accepted October 30, 2013; Published November 01, 2013 Citation: Saran V, Kumar S, Gupta AK, Ahmad S (2013) Differentiation of Handedness of Writer Based on their Strokes and Characteristic Features. J Forensic Res 4: 204. doi:10.4172/2157-7145.1000204 Copyright: © 2013 Saran V, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Keywords: Handedness; Handwriting strokes; Lef and right slope Introduction Handwriting is individual style of writing. When any person writes any letter, frstly the image of letter is cause in his mind and person tried to write this duplicate image of letter with the help of materials and hand muscles because our muscles control by the brain which guide the formation of letter and each vibration of movement is unconsciously afect the writer. In this study an attempt is made to diferentiate the lef handed and right handed writer by the horizontal stroke and the direction of slope. Tis is assumed that the Right Handed writers make strokes from lef-to-right and Lef Handed writers make strokes from right-to-lef. Te Right Handed writing and LH writing are diferentiating by other characters like slope [1,2]. Tis slope can be examined in only cursive writing. Te Right Handed writers makes forward slope and Lef Handed writers makes backward slope. In the document cases document examiner eliminate many suspects with the help of this technique. Te role of probabilities of handwriting characteristics was recognized over a hundred years ago. However their use in court testimony is not currently feasible due to the complexity of the problem. Tere have been very few eforts to characterize the statistical characteristics of such features, a notable one being [3]. On the other hand there have been eforts to compute features automatically but the features tend to be gross approximations of the characteristics employed or the features do not correspond to human determined characteristics at all. Methodology Total 100 HW samples were collected for this study, 50 were lef- handed writing and 50 were right-handed writing. Te collected HW samples were examined by various type of optical instrument such as stereoscopic microscope, hand lens, fexible arm illuminated magnifer and grid scale. Te HW samples of LH writing and RH writing was observed for the characteristic features like strokes and Slope. Direction of stroke was examine in which letters having cross bar like t, f, A, I, E, F has a signifcant degree of variation in their formation among the LH writer and RH writer, its been presumed from that the LH writer makes the horizontal stroke in R-to-L direction in contrast to the RH writer who write in L-to-R direction. Te theory was postulated on hypothesis and was proved by statistical analysis. Te slope was examined in only cursive writing. For the purpose of this study six letters was selected like t, l, d, f, g and y. For the measurement of direction of slope a base line was draw in the bottom of letter and then letter was divided by the vertical line and measure the direction of slope with the help of grid. Te RH writers makes forward slope and LH writers makes backward slope. Results and Discussion Te results are given in detail from Tables 1-4. It is remembered that the fundamental question behind this project are: “What % of LH writers and what % of RH writers on the basis of direction of strokes and slope?’’ Discussion Te results reported here in from Tables 1-4 long with the related Figures 1-6 emphasizes on the diference between lef-handed writer and right-handed writer it shows that the lef-handed writer made strokes in right-to-lef direction and the slope of letters has an inclination in backward direction where as right-handed writer made stokes in lef- to-right direction and the inclination of slope was in forward direction. Tese data of samples were checked by Statistical-Analysis. Signifcant P-value supported the hypothesis that there is signifcant diference in HW of LH writer and RH writer. Statistical study using various methods to calculate the probabilities of nearly 1500 writing styles of “and” were determined and tabulated by Srihari and Ball [4], and suggested scope of further research in statistical analysis of handwriting. Summary and Conclusion In the present study 100 samples of handwriting was taken for the Abstract Handwriting is a person’s particular & individual style of writing with pen or pencil, which contrasts with “Hand’’ which is an impersonal and formalized writing style in several historical varieties. In the present study 100 samples of handwriting were collected for the “Identifcation of handedness of author on the basis of their strokes and characteristic features’’. Out of 100 handwriting samples, 50 were left-handed writer and 50 were right-handed writer. The study was carried out at the School of Forensic-Science, SHIATS, Allahabad. Left-handed writing and Right- handed writing samples were identifed on the basis of horizontal strokes and slope and the hypothesis considered that there is signifcant difference in left-handed writing and right-handed writing were checked. J o u r n a l o f F o r e n s i c R e s e a r c h ISSN: 2157-7145 Journal of Forensic Research