Applicability of the CIELAB and CIEDE2000 Formulae for Detection of Colour Changes in Colour-Changeable Chewing Gum for Evaluating Masticatory Function

Yeerken, Yesiboli; Otomaru, Takafumi; Said, Mohamed; Li, Na; Taniguchi, Hisashi

doi:10.7860/jcdr/2017/23950.9754

Cited by 6 publications

(10 citation statements)

References 7 publications

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“…This equation involves an intermediate conversion to L*C*h coordinates, and Δ L’ is the difference in lightness and darkness, Δ C’ is the difference in chroma (+ implies brighter and − duller) and Δ H’ is the difference in hue. Positional corrections were also applied for the lack of uniformity with the CIE L*a*b* as lightness compensation (S L ), chroma compensation ( S C ), hue compensation ( S H ), as well as parametric factors k L , k C , k H to correctly account for the influence of experimental viewing conditions [ 39 ]; R T represents the spectral reflectance factor.

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Section: Methodsmentioning

confidence: 99%

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Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

et al. 2018

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Lignin availability has increased significantly due to the commercialization of several processes for recovery and further development of alternatives for integration into Kraft pulp mills. Also, progress in lignin characterization, understanding of its chemistry as well as processing methods have resulted in the identification of novel lignin-based products and potential derivatives, which can serve as building block chemicals. However, all these have not led to the successful commercialization of lignin-based chemicals and materials. This is because most analyses and characterizations focus only on the technical suitability and quantify only the composition, functional groups present, size and morphology. Optical properties, such as the colour, which influences the uptake by users for diverse applications, are neither taken into consideration nor analysed. This paper investigates the quantification of lignin optical properties and how they can be influenced by process operating conditions. Lignin extraction conditions were also successfully correlated to the powder colour. About 120 lignin samples were collected and the variability of their colours quantified with the CIE L*a*b* colour space. In addition, a robust and reproducible colour measurement method was developed. This work lays the foundation for identifying chromophore molecules in lignin, as a step towards correlating the colour to the functional groups and the purity.

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…”

Section: Methodsmentioning

confidence: 99%

“…Any of the lignin powders can be selected as a reference and the colour variations between the samples can be quantified from the coordinates with the CIEDE2000 (Δ E 00 ) formula below, with parameters and derivations for computation as given in [ 37 , 38 , 39 ]:

…”

Section: Appendix A1 Introductionmentioning

confidence: 99%

Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

et al. 2018

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“…This study explores the CIELAB color space analysis in examining the effects of different color systems based on Richard Hunter's former L, a, and b systems (Cinko & Becerir, 2019;Goyena & Fallis, 2019;Shrivastava et al, 2021;Thwaites et al, 2018;Yeerken, 2017). This framework is the most widely used color management system because it implements the international color consortium's (ICC) device profile in a device-independent model.…”

Section: General Conceptmentioning

confidence: 99%

“…L*a*b* is an abbreviation for the three distinct color spaces (Cinko & Becerir, 2019). RGB images were transformed to CIELAB (Cinko & Becerir, 2019;ju et al, 2014;Shrivastava et al, 2021;Thwaites et al, 2018;Yeerken, 2017). CIELAB is a nonlinear transformation of RGB in which the Euclidean distance between two colors equals the perceived distance between them (for distances <10 units).…”

Section: General Conceptmentioning

confidence: 99%

Quantitative Weathering Assessment of Rock Slope using CIELAB Color Space and Image Analysis Technique

Razali¹,

Jamal²,

Ismail³

et al. 2021

Preprint

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Quantitative weathering assessment using color changes is one of the new tools for slope stability assessment. In many other engineering field, CIELAB color space and image analytical tools have aided in enhancing the conventional method or inaccuracy due to the subjective and qualitative nature of visual assessment. This study focuses on the granitic rock slope surface assessment because of the predominant rock formation of granite in Malaysia. The 3D model of the rock slope was analyzed to extract the geological planes using compass plugin in Cloud Compare software and verified by manual compass mapping via scanline survey. Findings show that the a* and b* values increased with an increase in weathering results. This study focuses on the 50 points of measurement of rock slope and indicated a positive correlation of a* and b* with R2=0.9027. The image analysis result of the rock slope shows that major zoning (74%) is susceptible to failure due to structural control whilst another 26% are controlled by significant weathering in the grade IV-VI. This outcome is strongly verified via a geomechanical test, geological structure, and mineralogical assessment. The aforementioned mechanism is recommended in any geotechnical and technical purpose in enhancing the method of weathering assessment because image analysis provides reliable measurements in addition to the manual visual inspection.

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“…La masticación es una de las funciones esenciales del sistema estomatognático (Yeerken et al, 2017). Esta corresponde al acto de morder, triturar y masticar el alimento; siendo considerada un proceso fisiológico complejo, que envuelve actividades neuromusculares dependientes del desarrollo del complejo craneofacial, del sistema nervioso central y de la oclusión dentaria (Susanibar et al, 2014).…”

Section: Introductionunclassified

Caracterización de la Función Masticatoria en Estudiantes Universitarios

Moya

Olate

2017

Int. J. Odontostomat.

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RESUMEN: La masticación es una función orofacial aprendida y de relevancia para el desarrollo armónico del sistema estomatognático y craneofacial. Métodos no instrumentales para la evaluación de la masticación y antecedentes de caracterización de la función masticatoria en Chile son escasos. El objetivo de este estudio es caracterizar la función masticatoria en adultos jóvenes, específicamente el patrón masticatorio más prevalente, número promedio de ciclos masticatorios, así como el tiempo masticatorio promedio, empleando un alimento sólido. Fueron evaluados 92 sujetos, estudiantes universitarios, con edades de entre 18 y 26 años, sin distinción de sexo, con dentición permanente completa o solo ausencia del tercer molar. Los sujetos evaluados presentan mayor prevalencia de patrón masticatorio alternado (62 %), 15,1 ciclos masticatorios en promedio y un tiempo masticatorio promedio de 11,9 s. Nuestros resultados podrían ser considerados valores de referencia para la evaluación clínica de la masticación en Chile.

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Applicability of the CIELAB and CIEDE2000 Formulae for Detection of Colour Changes in Colour-Changeable Chewing Gum for Evaluating Masticatory Function

Cited by 6 publications

References 7 publications

Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

Quantitative Weathering Assessment of Rock Slope using CIELAB Color Space and Image Analysis Technique

Caracterización de la Función Masticatoria en Estudiantes Universitarios

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