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Original Articles

A new image processing method for enhancing the detection sensitivity of smooth transitions in liquid crystals

Pages 841-852 | Received 01 Sep 2001, Published online: 06 Aug 2010

Keep up to date with the latest research on this topic with citation updates for this article.

Read on this site (20)

O. R. Santos, W. S. Braga, D. D. Luders, A. R. Sampaio, N. M. Kimura, M. Simões & A. J. Palangana. (2021) Optical characterization of a biaxial nematic between uniaxial nematic lyotropic phases. Phase Transitions 94:6-8, pages 546-555.
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D.D. Luders, G.M. Arcolezi, M.L.G. Pereira, W.S. Braga, O.R. Santos, M. Simões, N.M. Kimura, A.R. Sampaio & A.J Palangana. (2021) Conoscopic image of a biaxial negative in a reentrant discotic – biaxial nematic phase transition. Liquid Crystals 48:7, pages 974-979.
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O. Ivanov, M. Petrov, H. Naradikian & J. L. Perez-Diaz. (2018) Phase transition detection by surface photo charge effect in liquid crystals. Phase Transitions 91:5, pages 449-460.
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O. R. Santos, W. S. Braga, D. D. Luders, A. R. Sampaio, N. M. Kimura, M. Simões & A. J. Palangana. (2016) Conoscopic image of a biaxial nematic phase in a sodium decyl sulfate – decanol – DO mixture. Molecular Crystals and Liquid Crystals 632:1, pages 57-63.
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D. D. Luders, K. C. Camargo, A. R. Sampaio, A. J. Palangana & N. M. Kimura. (2015) Studies of Image Processing and Refractive Index in Blue Phase. Molecular Crystals and Liquid Crystals 611:1, pages 192-196.
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L.Q. Amaral, O.R. Santos, W.S. Braga, N.M. Kimura & A.J. Palangana. (2015) Biaxial phase and coexistence of the two uniaxial nematic phases in the system sodium dodecyl sulphate–decanol–D2O. Liquid Crystals 42:2, pages 240-247.
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S. Sreehari Sastry, Sandeep Kumar, T. Vindhya Kumari, K. Mallika, B. Gowri Sankara Rao & Ha Sie Tiong. (2012) Liquid crystal parameters through image analysis. Liquid Crystals 39:12, pages 1527-1537.
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S. Sreehari Sastry, K. Mallika, B. Gowri Sankara Rao, Sie Tiong Ha & S. Lakshminarayana. (2012) Novel approach to study liquid crystal phase transitions using Legendre moments. Phase Transitions 85:8, pages 735-749.
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S. Sreehari Sastry, K. Mallika, B. Gowri Sankara Rao, Ha Sie Tiong & S. Lakshminarayana. (2012) Identification of phase transition temperatures by statistical image analysis. Liquid Crystals 39:6, pages 695-700.
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Aline Tavares, GuilhermeD. Vilela, Josene Toldo, PauloF.B. Gonçalves, Juliana Eccher, IvanH. Bechtold, AndersonR. Sampaio, RonaldoC. Viscovini, PauloH. Schneider & AloirA. Merlo. (2012) The 2:1 cycloadducts from [3 + 2] 1,3-dipolar cycloaddition of nitrile oxide and vinylacetic acid. Synthesis and liquid crystal behaviour. Liquid Crystals 39:2, pages 175-184.
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A. Sparavigna, A. Mello & G. Massa. (2009) Undulation textures at the phase transitions of some alkyloxybenzoic acids. Phase Transitions 82:5, pages 398-408.
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A. Sparavigna, A. Mello & B. Montrucchio. (2008) Growth of toric domains in mesophases of oxadiazoles. Phase Transitions 81:5, pages 471-477.
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A. Sparavigna, A. Mello & B. Montrucchio. (2007) Fan-shaped, toric and spherulitic textures of mesomorphic oxadiazoles. Phase Transitions 80:9, pages 987-998.
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A. Sparavigna, A. Mello & B. Montrucchio. (2007) Texture transitions in binary mixtures of 6OBAC with compounds of its homologous series. Phase Transitions 80:3, pages 191-201.
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A. Sparavigna, A. Mello & B. Montrucchio. (2006) Texture transitions in the liquid crystalline alkyloxybenzoic acid 6OBAC. Phase Transitions 79:4-5, pages 293-303.
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Jochen Strauß, Andreas Hoischen & Heinz-Siegfried Kitzerow. (2005) An Efficient Optical Method to Detect Phase Transitions in Liquid Crystals. Molecular Crystals and Liquid Crystals 439:1, pages 281/[2147]-291/[2157].
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LudmilaA. Karamysheva, SofiaI. Torgova, IrinaF. Agafonova, Amelia Sparavigna & Alfredo Strigazzi. (2000) Mesomorphic Oxadiazoles with Terminal Cl-Substituent. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 352:1, pages 335-342.
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A. SPARAVIGNA, A. SANNA, B. MONTRUCCHIO & A. STRIGAZZI. (1999) Streamline Image Analysis: a new tool for investigating defects in nematic liquid crystals. Liquid Crystals 26:10, pages 1467-1478.
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B. MONTRUCCHIO, A. SPARAVIGNA, S. I. TORGOVA & A. STRIGAZZI. (1998) A novel order transition inside the nematic phase of trans -4-hexylcyclohexane-1-carboxylic acid discovered by image processing. Liquid Crystals 25:5, pages 613-620.
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Articles from other publishers (31)

Padmavathi Sariki, Vasundhara Balireddy, Gowri Sankara Rao B & Ratna Raju M. (2022) Legendre Wavelet Transform for the Study of Phase Transitions in Hydrogen-Bonded Liquid Crystals. Brazilian Journal of Physics 52:6.
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Sławomir Pieprzyk, Tetiana Yevchenko, Dorota Dardas & Arkadiusz C. Brańka. (2022) Phase transitions and physical properties by a color texture analysis: Results for liquid crystals. Journal of Molecular Liquids 362, pages 119699.
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W.S. Braga, O.R. Santos, N.M. Kimura, M. Simões & A.J. Palangana. (2022) Optical signals of uniaxial and biaxial cholesteric lyotropic phases. Journal of Molecular Liquids 354, pages 118894.
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A. Farinha, F.C. Flores, A.R. Sampaio, N.M. Kimura & F.C.M. Freire. (2022) Phase transition detection in liquid crystal analysis by mathematical morphology. Journal of Molecular Liquids 345, pages 117015.
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R Suryantari & Flaviana. (2020) A novel method to study the twist dynamics in chiral nematic liquid crystals by texture analysis. IOP Conference Series: Materials Science and Engineering 858:1, pages 012053.
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H. Y. D. Sigaki, R. F. de Souza, R. T. de Souza, R. S. Zola & H. V. Ribeiro. (2019) Estimating physical properties from liquid crystal textures via machine learning and complexity-entropy methods. Physical Review E 99:1.
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M. Sailaja. (2018) A novel approach for analyzing refractive Indices and birefringence of nematic liquid crystals. Journal of Molecular Liquids 271, pages 429-436.
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Natalia Osiecka, Zbigniew Galewski & Maria Massalska-Arodź. (2017) TOApy program for the thermooptical analysis of phase transitions. Thermochimica Acta 655, pages 106-111.
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W.S. Braga, O.R. Santos, D.D. Luders, N.M. Kimura, A.R. Sampaio, M. Simões & A.J. Palangana. (2016) Refractive index measurements in uniaxial and biaxial lyotropic nematic phases. Journal of Molecular Liquids 213, pages 186-190.
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O.R. Santos, W.S. Braga, D.D. Luders, N.M. Kimura, M. Simões & A.J. Palangana. (2014) Conoscopic image of an induced biaxial nematic lyotropic phase. Journal of Molecular Liquids 200, pages 319-322.
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O.R. Santos, W.S. Braga, D.D. Luders, N.M. Kimura, M. Simões & A.J. Palangana. (2014) Study of optical conoscopy in uniaxial and biaxial nematic lyotropic phases. Journal of Molecular Liquids 197, pages 120-123.
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F. M. C. Freire, N. M. Kimura, D. D. Luders, A. J. Palangana & M. Simões. (2013) Calculation of the nematic entropy using digital images. Physical Review E 88:6.
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N. V. Kalinin & A. V. Emelyanenko. (2014) The existence of two nematic phases caused by dimer recombination. Moscow University Physics Bulletin 68:6, pages 455-462.
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W.S. Braga, O.R. Santos, D.D. Luders, A.R. Sampaio, N.M. Kimura, M. Simões & A.J. Palangana. (2013) Conoscopic image of a biaxial negative nematic phase in a potassium laurate–decanol–D2O mixture. Journal of Molecular Liquids 187, pages 20-23.
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N. V. Kalinin, A. V. Emelyanenko, L. A. Nosikova, Z. A. Kudryashova & Jui-Hsiang Liu. (2013) Recombination of dimers as a mechanism for the formation of several nematic phases. Physical Review E 87:6.
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S. Sreehari Sastry, C. Nageswara Rao, K. Mallika, S. Lakshminarayan & Ha Sie Tiong. (2013) Determination of Phase Transitions of <i>p</i>,<i>n</i>-Alkyloxy Benzoic Acid Mesogens Using Legendre Moments and Image Analysis. World Journal of Condensed Matter Physics 03:01, pages 54-61.
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S. Sreehari Sastry, B. Gowri Sankara Rao, K. B. Mahalakshmi, K. Mallika, C. Nageswara Rao & Ha Sie Tiong. (2012) Image Analysis Studies for Phase Transitions of Ferroelectric Liquid Crystals. ISRN Condensed Matter Physics 2012, pages 1-8.
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W.S. Braga, O.R. Santos, A.R. Sampaio, N.M. Kimura, M. Simões & A.J. Palangana. (2012) An optical conoscopy study of a reentrant discotic nematic—Biaxial nematic phase transition. Journal of Molecular Liquids 170, pages 72-75.
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S. Sreehari Sastry, T. Vindhya Kumari, C. Nageswara Rao, K. Mallika, S. Lakshminarayana & Ha Sie Tiong. (2012) Transition Temperatures of Thermotropic Liquid Crystals from the Local Binary Gray Level Cooccurrence Matrix. Advances in Condensed Matter Physics 2012, pages 1-9.
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A. Sparavigna & R. Marazzato. (2010) An image-processing analysis of skin textures. Skin Research and Technology 16:2, pages 161-167.
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J. Eccher, A.R. Sampaio, R.C. Viscovini, G. Conte, E. Westphal, H. Gallardo & I.H. Bechtold. (2010) Image processing as a tool for phase transitions identification. Journal of Molecular Liquids 153:2-3, pages 162-166.
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D. A. Oliveira, D. D. Luders, G. P. Souza, N. M. Kimura & A. J. Palangana. (2009) An optical microscopy study of the biaxial ‐ calamitic nematic lyotropic phase transition. Crystal Research and Technology 44:11, pages 1255-1258.
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A. B. Nych, D. Yu. Reznikov, O. P. Boiko, V. G. Nazarenko, V. M. Pergamenshchik & P. Bos. (2008) Alignment memory of a nematic liquid crystal and thermal isotropization of the surface adsorbed layer. Europhysics Letters (EPL) 81:1, pages 16001.
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W. S. Braga, N. M. Kimura, D. D. Luders, A. R. Sampaio, P. A. Santoro & A. J. Palangana. (2007) Reentrant isotropic-calamitic nematic phase transition in potassium laurate-decanol- D2O mixtures. The European Physical Journal E 24:3, pages 247-250.
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E. Hluchow, P.A. Santoro, L.R. Evangelista & A.J. Palangana. (2007) A density study of the textural transition in the nematic phases of a dimerized system. Journal of Molecular Liquids 133:1-3, pages 43-46.
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O. Kayacan. (2003) The effects of the nonextensivity on the dimerization process and nematic ordering. Physica A: Statistical Mechanics and its Applications 328:1-2, pages 205-213.
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Peter M. Cooke. (2000) Chemical Microscopy. Analytical Chemistry 72:12, pages 169-188.
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G Barbero, L.R Evangelista & M.P Petrov. (1999) Influence of the dimerization process on the nematic ordering. Physics Letters A 256:5-6, pages 399-404.
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A. Sanna, B. Montrucchio & A. Sparavigna. (1999) A parallel algorithm of texture analysis for liquid crystal investigation. Pattern Recognition Letters 20:2, pages 183-190.
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Amelia Carolina Sparavigna. (2016) La Storia Della Fisica Dello Stato Solito in Una Prolusione Di Eligio Perucca Del 1960 [The History of the Solid-State Physics in a Talk by Eligio Perucca of 1960]. SSRN Electronic Journal.
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Amelia Carolina Sparavigna. (2016) The Tsallis Entropy and the Segmentation of Images. SSRN Electronic Journal.
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