# A new auto-focus measure based on medium frequency discrete cosine transform filtering and discrete cosine transform

> Research article (Applied and Computational Harmonic Analysis, 2015) · cited 38× · AI/ML

**Wikidata**: [openalex:W1249530998](https://www.wikidata.org/wiki/openalex:W1249530998)  
**Source**: https://4ort.xyz/entity/a-new-auto-focus-measure-based-on-medium-frequency-discrete-cosine-transform-filtering-and-discrete-cosine-transform