Abstract:The article is devoted to the research of changes in lighting terminology on the example of one of the main properties of colour – lightness. The article substantiates the importance of the qualitative definition of terms for the professional understanding of various aspects of colorimetry and possibility of usage colour appearance models (CAM). Examples and comparisons of the wording of theterms of the CIECAM02 system are given based on variants from International Lighting Vocabularies (ILV) different years of release. The next is an example of the history of the development of the terms associated with different conditions of perception and definition of brightness, in particular, such as “lightness” and “subjective brightness”. The importance of the clear agreement between the terms and their definitions for the understanding, use, and development of the modern models and systems of colour perception is substantiated. The English-language and the Russian-language scientific sources are considered. The analysis of which demonstrates the dynamics of changes in the understanding of the term “Lightness”. Special attention is paid to the fate of the term in the Russian-language lighting literature, discrepancies in the interpretation of the term in various sources are shown, which can lead to a misunderstanding of modern colour appearance models. The comparison of the interpretation of the term“Lightness” is reviewing based on the English-language and the Russian-language scientific sources. The comparison helps to identify the reasons that led to the problems of definitions and understanding of this term. In the conclusion, the authors invite experts to discuss lighting terminology and harmonize Russian-language lighting literature with English-language literature. Also substantiates the importance of the participation of lighting engineering scientists in translations of different scientific literary sources devoted to colour perception. It is proposed to continue work on improving, and possibly a special reprinting of translations for the better understanding in the Russian lighting engineering literature.
References:1. Blattner, P. Present and Future Activities of the International Commission on Illumination (CIE) // Light & Engineering Journal, 2020, Vol. 28, # 5, pp. 4–8. 2. Fairchild, M.D. Colour appearance model / Wiley, 2013, 450 p. 3. Yuechen, Zhu et al. Modelling of simultaneous contrast effects using memory colour matching method to revise the CIECAM16 colour appearance model // OP06 CIE x046:2019. Proceedings of the 29th CIE session, Washington D.C., USA, 14–22, (June 2019). 4. Budak, V.P., Vagina, A.E., Epihov, N.S., Smirnov, P.A. Lightness and Luminance: Perceptual Qualities in Conditions of Simultaneous Contrast // Light & Engineering Journal, 2021, Vol. 29, # 3, pp. 100–107. 5. CIE, International Lighting Vocabulary, CIE Publ. No 17.4, Vienna (1987). 6. https://old.vnisi.ru/joomla/ru/deyatelnost/dictionary (date of addressing 30.01.2022). 7. Ming Ronnier Luo and Changjun Li. CIECAM02 and its Recent Developments / Springer New York, New York, NY, 19–58 (May 2012). 8. Stevens, J.C, Stevens, S.S. Brightness functions: effects of adaptation / J. Opt. Soc. Am. 53:375–385 (1963). 9. Feoktistova, V.V. Functional and structural – semantic features of the English scientific – technical terminology of the lighting industry. Dis. cand. philol. Sciences, Saransk, Ogarev MGU [Feoktistova V.V. Funktsionalʹnyye i strukturno – semanticheskiye osobennosti angliyskoy nauchnoy – tekhnicheskoy terminologii svetotekhnicheskoy promyshlennosti, Dis. kand. filol. nauk. Saransk: MGU im. N.P. Ogareva] / Saransk: N.P. Ogarev Mordovia State University. 10. Troland, L.T. Report of Committee on Colourimetry for 1920–21 // J. Opt. Soc. Am. 1922, 6, pp. 527–596. 11. Fedorov, N.T. The current state of colorimetry / Moscow: GTTI, 1933, 192 p. 12. Atwater D. The Effect of Form on Colour Contrast // Journal of General Psychology, 1933, 8:2, pp. 472–478. 13. Pitt F. H.G. The effect of adaptation and contrast on apparent brightness // Proceedings of the Physical Society of London, 1939, 51, pp. 817–830. 14. Teplov, B.M. Interaction of simultaneous light sensations / Moscow; Leningrad: Sotsekgiz, 1935, 272 p. 15. Teplov, B.M., Sokolova, I.M. Measurement of pigment colour saturation thresholds / Moscow; Leningrad: Sotsekgiz, 1935, 272 p. 16. Jones Loyd A. Colourimetry: Preliminary Draft of a Report on Nomenclature and Definitions // J. Opt. Soc., Am. 1937, 27, pp. 207–213. 17. Helson, H. Fundamental problems in colour vision. I. The principle governing changes in hue, saturation, and lightness of non-selective samples in chromatic illumination // Journal of Experimental Psychology, 1938, 23(5), pp. 439–476. 18. Judd Deane B. Hue Saturation and Lightness of Surface Colours with Chromatic Illumination // J. Opt. Soc. Am.1940, 30, pp. 2–32. 19. Moon, P and Spencer, D. E. A Study of Photometric Nomenclature // J. Opt. Soc. Am. 1946, 36, pp. 666–675. 20. Meshkov, V.V. Lightness and Brightness // Svetotekhnika, 1958, # 12, pp. 1–5. 21. Meshkov, V.V. Fundamentals of light and engineering. Part 2 / M: Energoatomizdat, 1961, 416 p. 22. Kravkov S.V. The eye and its work / 4th ed. M.: Medgiz; L., 1950, 531p. 23. International Lighting Vocabulary / Ed. L.D. Belkind / M: Fizmatgiz, 1963, 428 p. 24. International Lighting Dictionary / Ed. by Dr. of Tech. Sciences D.N. Lazarev / Moscow: Russian language, 1979, 278 p. 25. Ivans, R.M. Introduction to colour theory / Moscow: Mir Publishing House, 1964, 442 p. 26. Judd, D., Vyshetsky, G. Colour in science and technology / Moscow: Mir Publishing House, 1978, 592 p. 27. Meshkov V.V., Matveev A.B. Fundamentals of lighting engineering, Ch.2 / Moscow: Energoatomizdat, 1989, 432 p. 28. Fershild, M.D. Models of colour perception / Second edition, St. Petersburg, 2006, 349 p. 29. CIE S017/E: 2011 ILV: International Lighting Vocabulary
The Light Field And The Scope Of Light Science Light & Engineering Vol. 29, No. 1
Evaluation of Lighting Quality Based On Visibility L&E, Vol.31, No.4, 2023
Construction Of A Psychophysical Scale Of Visual Comfort of Lighting Based On A Neural Network: preparation Of The Experiment L&E, Vol. 29, No. 3, 2021