# An Efficient Expression Recognition Method using Contourlet Transform

> Research article (Proceedings of the 2nd International Conference on Perception and Machine Intelligence, 2015) · cited 22× · AI/ML

**Wikidata**: [openalex:W1995243696](https://www.wikidata.org/wiki/openalex:W1995243696)  
**Source**: https://4ort.xyz/entity/an-efficient-expression-recognition-method-using-contourlet-transform