# Multi-gradient features and elongated quinary pattern encoding for image-based facial expression recognition

> Research article (Pattern Recognition, 2017) · cited 48× · AI/ML

**Wikidata**: [openalex:W2620705316](https://www.wikidata.org/wiki/openalex:W2620705316)  
**Source**: https://4ort.xyz/entity/multi-gradient-features-and-elongated-quinary-pattern-encoding-for-image-based-facial-expression-recognition