# Expression invariant face recognition using local binary patterns and contourlet transform

> Research article (Optik, 2015) · cited 24× · AI/ML

**Wikidata**: [openalex:W2194630763](https://www.wikidata.org/wiki/openalex:W2194630763)  
**Source**: https://4ort.xyz/entity/expression-invariant-face-recognition-using-local-binary-patterns-and-contourlet-transform