# An improved geometrical calibration method for stereo deflectometry by using speckle pattern

> Research article (Optics Communications, 2021) · cited 15× · AI/ML

**Wikidata**: [openalex:W3202886316](https://www.wikidata.org/wiki/openalex:W3202886316)  
**Source**: https://4ort.xyz/entity/an-improved-geometrical-calibration-method-for-stereo-deflectometry-by-using-speckle-pattern