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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:22 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Polymer Physics
Title:
Computing phase transition temperatures using statistical image analysis
Authors:
Constantin Catalin Armeanu(1), Bogdan BUTOI(1,2)
Affiliation:
1)University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania
2) National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania
E-mail
catalinarmeanu@gmail.com
Keywords:
statistical parameters, liquid crystals, image analysis, phase transition
Abstract:
In this study, phase transition temperatures of liquid crystals are studied through image analysis. We use statistical image analysis to compute the statistical parameters of the textures of each sample as function of temperature. The structural phases and phase transitions are fundamentally determined in this experiment based on the changes in the characteristics of textural patterns which are recorded in an image. The textures of the samples are realized with the optical polarization microscope attached to the hot stage using a Peltier cell and a high resolution camera. The phase transition temperatures of samples are deduced by the abrupt changes in the computed parameter values, and is shown to be a helpful process to identify the phase transition temperatures of the samples. This is necessary to segregate between crystal modifications and nematic E7 sub-phases.
References:
(1) Radu Mutihac, Medical Imaging, Editura Universitatii din Bucuresti, 2011
(2) Silvia Curteanu, Initiere in Matlab, Editura Polirom, 2008
(3) Rafael Gonzales, Richard Woods, Steven Eddins, Digital Image Processing Using Matlab, Pearson Education, 2004
(4) S. Sreehari Sastry, B. Gowri Sankara Rao, K. B. Mahalakshmi, K. Mallika,C. Nageswara Rao, Ha Sie Tiong, Image Analysis Studies for Phase Transitions of Ferroelectric Liquid Crystals, International Scholarly Research Network, 2012
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