Imperial College London

DrBennyLo

Faculty of MedicineDepartment of Surgery & Cancer

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 0806benny.lo Website

 
 
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Location

 

B414BBessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

222 results found

Lo B, Velastin SA, Vicencio-Silva MA, Sun Jet al., 2003, An intelligent distributed surveillance system for public transport, Pages: 53-57, ISSN: 0963-3308

The PRISMATICA, an intelligent distributed surveillance system for public transport, is discussed. The project include tailoring of the environment, education of young people, liason with the judicial system and, visual surveillance through CCTV systems. Managers can deploy a range of organizational and technical means using the PRISMATICA. Management is geographically distributed and management takes place by converging information to control rooms both at local stations and centralized levels.

Conference paper

Lo BPL, Thiemjarus S, Yang GZ, 2003, Adaptive Bayesian networks for video processing, New York, IEEE international conference on image processing, Barcelona, Spain, 2003, Publisher: IEEE, Pages: 889-892

Due to its static nature, the inference capability of Bayesian networks (BNs) often deteriorates when the basis of input data varies, especially in video processing applications where the environment often changes constantly. This paper presents an adaptive BN where the network parameters are adjusted in accordance to input variations. An efficient retraining method is introduced for updating the parameters and the proposed network is applied to shadow removal in video sequence processing with quantitative results demonstrating the significance of adapting the network with environmental changes.

Conference paper

Benny PL Lo, Ara Darzi, Guang-Zhong Yang, 2003, Episode Classification for the Analysis of Tissue/Instrument Interaction with Multiple Visual Cues, MICCAI 2003, Publisher: Springer-Verlag

Conference paper

Lai Lo BP, Sun J, Velastin SA, 2003, Fusing visual and audio information in a distributed Intelligent surveillance system for public transport systems, Zidonghua Xuebao/Acta Automatica Sinica, Vol: 29, Pages: 393-407, ISSN: 0254-4156

Extensive research is conducted in applying video and audio processing algorithms for improving passenger safety and security in public transport systems. To develop a complete and practical intelligent surveillance system, the EU project, PRISMATICA, is designed to integrate different intelligent detection devices, which includes local camera networks, crowd monitoring devices, intelligent cameras, contactless smart cards, wireless video/audio transmission, and audio surveillance systems, to monitor different safety and security concerns in railways. As different algorithms and techniques are applied in different devices, to fulfil the real-time requirement, the PRISMATICA system is designed as a distributed system where each device is a stand-alone process, and devices are linked and synchronized using a CORBA network. Although the resulting system is capable of monitoring and detecting different events, certain detected events could represent the same incident. In addition, the system could potentially generate too much information for operators to identify and react to incidents straight away. This paper presents a novel concept of fusing different evidences from a distributed visual and audio processing system to improve the robustness of incident detection and to provide more descriptive events. On-site testing being carried out in London and Paris to validate the performance of this system.

Journal article

Stoyanov D, ElHelw M, Lo BP, Chung A, Bello F, Yang GZet al., 2003, Current issues of photorealistic rendering for virtual and augmented reality in minimally invasive surgery, Los Alamitos, 7th international conference on information visualization (IV 2003), Publisher: IEEE Computer Soc, Pages: 350-358

Conference paper

Lo BPL, Darzi A, Yang GZ, 2003, Episode classification for the analysis of tissue/instrument interaction with multiple visual cues, Berlin, 6th international conference on medical imaging computing and computer - assisted intervention, Montreal, Canada, 2003, Publisher: Springer-Verlag, Pages: 230-237

Conference paper

Stoyanov D, ElHelw M, Lo BP, Chung A, Bello F, Yang GZet al., 2003, Current issues of photorealistic rendering for virtual and augmented reality in minimally invasive surgery, Los Alamitos, 7th international conference on information visualization (IV 2003), Publisher: IEEE Computer Soc, Pages: 350-358

Conference paper

Velastin SA, Vicencio-Sliva MA, Lo B, Sun J, Khoudour Let al., 2002, A distrubuted surveillance system for improving security in public transport networks, MEASUREMENT & CONTROL, Vol: 35, Pages: 209-213, ISSN: 0020-2940

Journal article

Benny PL Lo, Guang-Zhong Yang, 2002, Neuro-Fuzzy Shadow Filter, The European Conference on Computer Vision (ECCV) 2002, Pages: 381-392

Conference paper

Velastin SA, Vicencio-Silva MA, Lo B, Sun J, Khoudour Let al., 2002, A distrubuted surveillance system for improving security in public transport networks, Measurement and Control, Vol: 35, Pages: 209-213, ISSN: 0020-2940

Journal article

Lo BPL, Yang GZ, 2002, Neuro-fuzzy shadow filter, LECT NOTES COMPUT SC, Vol: 2352, Pages: 381-392, ISSN: 0302-9743

In video sequence processing, shadow remains a major source of error for object segmentation. Traditional methods of shadow removal are mainly based on colour difference thresholding between the background and current images. The application of colour filters on MPEG or MJPEG images, however, is often erroneous as the chrominance information is significantly reduced due to compression. In addition, as the colour attributes of shadows and objects are often very similar, discrete thresholding cannot always provide reliable results. This paper presents a novel approach for adaptive shadow removal by incorporating four different filters in a neuro-fuzzy framework. The neuro-fuzzy classifier has the ability of real-time self-adaptation and training, and its performance has been quantitatively assessed with both indoor and outdoor video sequences.

Journal article

Lo BPL, Velastin SA, 2001, Automatic congestion detection system for underground platforms, International Symposium on Intelligent Multimedia, Video and Speech Processing, Publisher: HONG KONG POLYTECHNIC UNIV, Pages: 158-161

Conference paper

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