# Facial expression recognition and histograms of oriented gradients: a comprehensive study

> Research article (SpringerPlus, 2015) · cited 183× · AI/ML

**Wikidata**: [openalex:W1959806570](https://www.wikidata.org/wiki/openalex:W1959806570)  
**Source**: https://4ort.xyz/entity/facial-expression-recognition-and-histograms-of-oriented-gradients-a-comprehensive-study