The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.

To search for another term please use  "Back to the list" to return to the main page or the e-ILV.

For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.

For advice on CIE Publications contact Note the CIE Helpdesk cannot assist with technical enquiries.


appearance, <perceptual>

aspect of visual perception through which an object is perceived to have attributes such as size, shape, colour, texture, gloss, transparency, and opacity

Note 1 to entry: In psychophysical studies, the term "appearance" is used in the sense of visual perception in which the spectral and geometric aspects of a visual stimulus are integrated with its illuminating and viewing environment.

Note 2 to entry: This entry was numbered 17-51 in CIE S 017:2011.

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.