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Real-Time Abnormal Object Detection for Video Surveillance in Smart Cities.

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Summary
This summary is machine-generated.

This study introduces a lightweight convolutional neural network for real-time detection of weapons like guns and knives in video surveillance. The method efficiently classifies and locates these objects on resource-constrained devices, improving security monitoring.

Keywords:
camera networkcomputer visiondeep convolutional networkgun and knife detectionobject detectionsmart cityvideo surveillance

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Area of Science:

  • Computer Vision
  • Artificial Intelligence
  • Machine Learning

Background:

  • Video surveillance systems face challenges in real-time abnormal behavior monitoring, especially detecting weapons like guns and knives across multiple cameras.
  • Resource-constrained devices limit the effectiveness of current object detection methods in surveillance.
  • Manual monitoring of multiple camera feeds for threats is tedious and prone to human error.

Purpose of the Study:

  • To develop a resource-constrained, lightweight subclass detection method for accurately identifying and classifying various types of guns and knives in real-time video surveillance.
  • To improve the efficiency and effectiveness of object detection on devices with limited computational power.
  • To enhance the capabilities of automated security systems in detecting dangerous objects.

Main Methods:

  • A multiclass subclass detection convolutional neural network (CNN) was designed for classifying object frames into abnormal and normal categories.
  • The proposed CNN method focuses on classifying, locating, and detecting different types of guns and knives.
  • The model was evaluated on diverse datasets including ImageNet, IMFDB, Open Images, and Olmos, as well as multiview camera setups.

Main Results:

  • The proposed method achieved high precision rates: 97.50% on ImageNet/IMFDB, 90.50% on Open Images, 93% on Olmos, and 90.7% on multiview cameras.
  • Compared to state-of-the-art methods (84.21% for handguns, 90.20% for knives), the proposed approach demonstrates superior performance.
  • The system achieved a satisfactory precision score of 85.5% for detection in multiview cameras, even on resource-constrained devices.

Conclusions:

  • The developed lightweight CNN method effectively detects and classifies guns and knives in real-time surveillance scenarios.
  • This approach offers an efficient solution for object detection on resource-constrained devices, enhancing security monitoring capabilities.
  • The method shows significant promise for improving automated threat detection in complex, multiview video environments.