TAILIEUCHUNG - Báo cáo hóa học: "Vehicle tracking and classification in challenging scenarios via slice sampling"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài :Vehicle tracking and classification in challenging scenarios via slice sampling | Nieto et al. EURASIP Journal on Advances in Signal Processing 2011 2011 95 http content 2011 1 95 o EURASIP Journal on Advances in Signal Processing a SpringerOpen Journal RESEARCH Open Access Vehicle tracking and classification in challenging scenarios via slice sampling 1 1 1 1 - . 1 2 Marcos Nieto Luis Unzueta Javier Barandiaran Andoni Cortés Oihana Otaegui and Pedro Sanchez Abstract This article introduces a 3D vehicle tracking system in a traffic surveillance environment devised for shadow tolling applications. It has been specially designed to operate in real time with high correct detection and classification rates. The system is capable of providing accurate and robust results in challenging road scenarios with rain traffic jams casted shadows in sunny days at sunrise and sunset times etc. A Bayesian inference method has been designed to generate estimates of multiple variable objects entering and exiting the scene. This framework allows easily mixing different nature information gathering in a single step observation models calibration motion priors and interaction models. The inference of results is carried out with a novel optimization procedure that generates estimates of the maxima of the posterior distribution combining concepts from Gibbs and slice sampling. Experimental tests have shown excellent results for traffic-flow video surveillance applications that can be used to classify vehicles according to their length width and height. Therefore this vision-based system can be seen as a good substitute to existing inductive loop detectors. Keywords vehicle tracking Bayesian inference MRF particle filter shadow tolling ILD slice sampling real time 1 Introduction The advancements of the technology as well as the reduction of costs of processing and communications equipment are promoting the use of novel counting systems by road operators. A key target is to allow free flow tolling services or shadow tolling to reduce traffic .

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