# From boundaries to bumps: When closed (extremal) contours are critical

> Research article (Journal of Vision, 2021) · cited 15× · AI/ML

**Wikidata**: [openalex:W3025066725](https://www.wikidata.org/wiki/openalex:W3025066725)  
**Source**: https://4ort.xyz/entity/from-boundaries-to-bumps-when-closed-extremal-contours-are-critical