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An Automated Tachograph Chart Analysis System A. Antonacopoulos and D.P. Kennedy

Summary: An Automated Tachograph Chart Analysis System
A. Antonacopoulos and D.P. Kennedy
PRImA Group, Department of Computer Science, University of Liverpool
Peach Street, Liverpool, L69 7ZF, United Kingdom
Abstract. This paper describes a new system that analyses tachograph charts.
These circular charts are legal records of information on the different types of
driver activity (driving, other duty, standby and rest) and vehicle data (speed and
distance travelled). As each driver of each passenger and goods vehicle over a
certain capacity must use a chart for every 24-hour period, there is a significant
need for automated analysis (currently, tachograph charts are analysed
The system starts by determining the shape parameters of the chart
(location of the centre and radius). The position of the start of the 24-hour period
(radius from centre to 24 hour tick mark) is then estimated. Finally the driver
activity trace (recorded in a circular manner) is extracted, converted into a linear
representation and recognised. Results from the evaluation of the system against
professionally prepared ground truth indicate at least 94% accuracy in reading
the driving time even on difficult (with scratches and marks) charts.
1 Introduction


Source: Antonacopoulos, Apostolos - School of Computing, Science and Engineering, University of Salford


Collections: Computer Technologies and Information Sciences