# An Efficient Solution to the Perspective-n-Point Problem for Camera With Unknown Focal Length

> Research article (IEEE Access, 2020) · cited 16× · AI/ML

**Wikidata**: [openalex:W3082497987](https://www.wikidata.org/wiki/openalex:W3082497987)  
**Source**: https://4ort.xyz/entity/an-efficient-solution-to-the-perspective-n-point-problem-for-camera-with-unknown-focal-length