# Illumination Normalization of Face Image Based on Illuminant Direction Estimation and Improved Retinex

> Research article (PLoS ONE, 2015) · cited 14× · AI/ML

**Wikidata**: [openalex:W2094266722](https://www.wikidata.org/wiki/openalex:W2094266722)  
**Source**: https://4ort.xyz/entity/illumination-normalization-of-face-image-based-on-illuminant-direction-estimation-and-improved-retinex