Safety helmet wearing plays a major role in protecting the safety of workers in industry and construction. so a real-time helmet wearing detection technology is very necessary. This paper proposes an improved YOLOv4 algorithm to achieve real-time and efficient safety helmet wearing detection. The improved YOLOv4 algorithm adopts a lightweight network PP-LCNet as the backbone network a... https://leoners.shop/product-category/air-purifier/