Information extraction from complex circular charts

Author

Antonacopoulos, A. ; Kennedy, D.P.

Author_Institution

Dept. of Comput. Sci., Liverpool Univ., UK

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

784

Lastpage

787

Abstract

The paper is concerned with the recognition of circular charts (disks). The application domain is tachograph disks. These disks exhibit typical properties of circular charts but are more complex as different types of information are present at the same time and there are serious artefacts that hinder the recognition process. The method starts by analysing the characteristics of the greyscale image to separate the background from the recorded information. The position of the disk and its centre are then established. Finally, the orientation of the disk is determined and the information (recorded in a circular manner) is read and converted into a linear representation. Experimental results of testing against professionally prepared ground-truth show an average accuracy of 94% in the recognition of the target information

Keywords

feature extraction; graphs; image recognition; image scanners; road vehicles; application domain; chart recognition; complex circular charts; disk orientation; greyscale image; information extraction; linear representation; professionally prepared ground-truth; recognition process; tachograph disks; target information. recognition; Application software; Computer science; Data mining; Humidity; Image converters; Information resources; Ink; Optical character recognition software; Testing; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Document Analysis and Recognition, 2001. Proceedings. Sixth International Conference on

Conference_Location

Seattle, WA

Print_ISBN

0-7695-1263-1

Type

conf

DOI

10.1109/ICDAR.2001.953895

Filename

953895