Publication detail

Person Detection for an Orthogonally Placed Monocular Camera

ŠKRABÁNEK, P. DOLEŽEL, P. NĚMEC, Z. ŠTURSA, D.

Original Title

Person Detection for an Orthogonally Placed Monocular Camera

Type

journal article in Web of Science

Language

English

Original Abstract

Counting of passengers entering and exiting means of transport is one of the basic functionalities of passenger flow monitoring systems. Exact numbers of passengers are important in areas such as public transport surveillance, passenger flow prediction, transport planning, and transport vehicle load monitoring. To allow mass utilization of passenger flow monitoring systems, their cost must be low. As the overall price is mainly given by prices of the used sensor and processing unit, we propose the utilization of a visible spectrum camera and data processing algorithms of low time complexity to ensure a low price of the final product. To guarantee the anonymity of passengers, we suggest orthogonal scanning of a scene. As the precision of the counting is relevantly influenced by the precision of passenger recognition, we focus on the development of an appropriate recognition method. We present two opposite approaches which can be used for the passenger recognition in means of transport with and without entrance steps, or with split level flooring. The first approach is the utilization of an appropriate convolutional neural network (ConvNet), which is currently the prevailing approach in computer vision. The second approach is the utilization of histograms of oriented gradients (HOG) features in combination with a support vector machine classifier. This approach is a representative of classical methods. We study both approaches in terms of practical applications, where real-time processing of data is one of the basic assumptions. Specifically, we examine classification performance and time complexity of the approaches for various topologies and settings, respectively. For this purpose, we form and make publicly available a large-scale, class-balanced dataset of labelled RGB images. We demonstrate that, compared to ConvNets, the HOG-based passenger recognition is more suitable for practical applications. For an appropriate setting, it defeats the ConvNets in terms of time complexity while keeping excellent classification performance. To allow verification of theoretical findings, we construct an engineering prototype of the system.

Keywords

support vector machines; convolutional neural network; histograms of oriented gradients; person flow monitoring system; object recognition

Authors

ŠKRABÁNEK, P.; DOLEŽEL, P.; NĚMEC, Z.; ŠTURSA, D.

Released

14. 10. 2020

Publisher

Wiley-Hindawi

Location

LONDON

ISBN

0197-6729

Periodical

JOURNAL OF ADVANCED TRANSPORTATION

Year of study

2020

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

13

Pages count

13

URL

https://www.hindawi.com/journals/jat/2020/8843113/

Full text in the Digital Library

http://hdl.handle.net/11012/195743

BibTex

@article{BUT166258,
  author="Pavel {Škrabánek} and Petr {Doležel} and Zdeněk {Němec} and Dominik {Štursa}",
  title="Person Detection for an Orthogonally Placed Monocular Camera",
  journal="JOURNAL OF ADVANCED TRANSPORTATION",
  year="2020",
  volume="2020",
  number="1",
  pages="1--13",
  doi="10.1155/2020/8843113",
  issn="0197-6729",
  url="https://www.hindawi.com/journals/jat/2020/8843113/"
}