Dr. Chris Lloyd Profile

Dr. Chris Lloyd

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Proceedings Article | 7 October 2019 Presentation + Paper

A utility-driven surveillance approach to trade-off security and privacy

C. Lloyd, T. Mannucci, H. Bouma, K. Schutte, A. Huizing

Proceedings Volume 11166, 111660S (2019) https://doi.org/10.1117/12.2533741

KEYWORDS: Zoom lenses, Surveillance, Video surveillance, Sensing systems, Sensors, Video, Computing systems, Cameras, Information security, Imaging systems

Read Abstract +

In recent years advances in machine learning methods such as deep learning has led to significant improvements in our ability to track people and vehicles, and to recognise specific individuals. Such technology has enormous potential to enhance the performance of image-based security systems. However, wide-spread use of such technology has important legal and ethical implications, not least for individuals right to privacy. In this paper, we describe a technological approach to balance the two competing goals of system efficacy and privacy. We describe a methodology for constructing a “goal-function” that reflects the operators preferences for detection performance and anonymity. This goal function is combined with an image-processing system that provides tracking and threat assessment functionality and a decision-making framework that assesses the potential value gained by providing the operator with de-anonymized images. The framework provides a probabilistic approach combining user preferences, world state model, possible user actions and threat mitigation effectiveness, and suggests the user action with the largest estimated utility. We show results of operating the system in a perimeter-protection scenario

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