# Sparse, collaborative, or nonnegative representation: Which helps pattern classification?

> Research article (Pattern Recognition, 2018) · cited 147× · AI/ML

**Wikidata**: [openalex:W2963128427](https://www.wikidata.org/wiki/openalex:W2963128427)  
**Source**: https://4ort.xyz/entity/sparse-collaborative-or-nonnegative-representation-which-helps-pattern-classification