# Three-Filters-to-Normal: An Accurate and Ultrafast Surface Normal Estimator

> Research article (IEEE Robotics and Automation Letters, 2021) · cited 42× · AI/ML

**Wikidata**: [openalex:W3025191362](https://www.wikidata.org/wiki/openalex:W3025191362)  
**Source**: https://4ort.xyz/entity/three-filters-to-normal-an-accurate-and-ultrafast-surface-normal-estimator