# Abnormal crowd density estimation in aerial images based on the deep and handcrafted features fusion

> Research article (Expert Systems with Applications, 2021) · cited 16× · AI/ML

**Wikidata**: [openalex:W3126940873](https://www.wikidata.org/wiki/openalex:W3126940873)  
**Source**: https://4ort.xyz/entity/abnormal-crowd-density-estimation-in-aerial-images-based-on-the-deep-and-handcrafted-features-fusion