# To compute lightness, illumination is not estimated, it is held constant.

> Research article (Journal of Experimental Psychology Human Perception & Performance, 2018) · cited 10× · AI/ML

**Wikidata**: [openalex:W2799883619](https://www.wikidata.org/wiki/openalex:W2799883619)  
**Source**: https://4ort.xyz/entity/to-compute-lightness-illumination-is-not-estimated-it-is-held-constant