Transition Temperatures of Thermotropic Liquid Crystals from the Local Binary Gray Level Cooccurrence Matrix. (27th December 2012)

• Record Type: Journal Article
• Authors: Sastry, S. Sreehari; Kumari, T. Vindhya; Rao, C. Nageswara; Mallika, K.; Lakshminarayana, S.; Tiong, Ha Sie
• Other Names: Wilding Nigel Academic Editor.
• Is Part Of: Advances in condensed matter physics. Volume 2012(2012)
• Publication Date: 2012-12-27
• Subjects: Condensed matter -- Periodicals; Condensed matter; Periodicals; 530.41
• DOI: 10.1155/2012/527065
• Languages: English
• ISSNs: 1687-8124

Abstract

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 p, n -alkyloxy benzoic acid (n OBA, n = 4, 6, 8, 10 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 associatedwiththe 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.