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Advances in Condensed Matter Physics
Volume 2012 (2012), Article ID 527065, 9 pages
http://dx.doi.org/10.1155/2012/527065
Research Article

Transition Temperatures of Thermotropic Liquid Crystals from the Local Binary Gray Level Cooccurrence Matrix

1Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Andhra Pradesh 522510, India
2Department of Electronics and Communication Engineering, K L University, Greenfields, Vaddeswaram, Guntur, Andhra Pradesh 522002, India
3Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman and Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia

Received 7 October 2012; Revised 19 November 2012; Accepted 20 November 2012

Academic Editor: Nigel Wilding

Copyright © 2012 S. Sreehari Sastry et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a method which combines the statistical analysis with texture structural analysis called Local Binary Gray Level Cooccurrence Matrix (LBGLCM) to investigate the phase transition temperatures of thermotropic -alkyloxy benzoic acid ( OBA, and 12) liquid crystals. Textures of the homeotropically aligned liquid crystal compounds are recorded as a function of temperature using polarizing optical microscope attached to the hot stage and high resolution camera. In this method, second-order statistical parameters (contrast, energy, homogeneity, and correlation) are extracted from the LBGLCM of the textures. The changes associated with the values of extracted parameters as a function of temperature are a helpful process to identify the phases and phase transition temperatures of the samples. Results obtained from this method have validity and are in good agreement with the literature.