# Color image watermarking based on quaternion Fourier transform and improved uniform log-polar mapping

> Research article (Computers & Electrical Engineering, 2015) · cited 75× · AI/ML

**Wikidata**: [openalex:W2083623877](https://www.wikidata.org/wiki/openalex:W2083623877)  
**Source**: https://4ort.xyz/entity/color-image-watermarking-based-on-quaternion-fourier-transform-and-improved-uniform-log-polar-mapping