# A spatial-temporal framework based on histogram of gradients and optical flow for facial expression recognition in video sequences

> Research article (Pattern Recognition, 2015) · cited 84× · AI/ML

**Wikidata**: [openalex:W1656792910](https://www.wikidata.org/wiki/openalex:W1656792910)  
**Source**: https://4ort.xyz/entity/a-spatial-temporal-framework-based-on-histogram-of-gradients-and-optical-flow-for-facial-expression-recognition-in-video