Robust Model for Classification and Detection of Knives and Guns Using Computer Vision

Sandoval J.; Echenique C.; Rosales D.; Ormeño V.; Fabián J.; Ticona W. · Lecture Notes in Networks and Systems (2025) · DOI: 10.1007/978-3-031-96380-3_38

Resumen

Crime and delinquency are currently among the greatest challenges, highlighting the need to integrate advanced technologies into urban security systems. In the present study, an efficient and accurate system was developed to detect weapons (guns and knives) in real-time in surveillance videos using Computer Vision techniques. The applied methodology was based on 5 phases: obtaining the dataset; Preprocessing (Resizing and Grayscale); Feature extractors (BOVW, HOG and SIFT); Models Machine and Deep Learning models such as (KNN, SVM, DT, RF, AdaBoost, VGG16 and CNN). The proposed system demonstrated high accuracy in detecting weapons with the VGG-16 model: Accuracy of 0.9802, Precision of 0.9802, and Recall of 0.9802, reliably differentiating between threatening and non-threatening objects. Deploying this technology in high-risk areas, such as airports and public events, could significantly improve security measures by providing fast and accurate alerts. In future, we plan to focus on optimizing these algorithms for low-cost devices and extending detection to a wider range of threats. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

Instituciones: Universidad ESAN; Universidad Tecnológica del Perú