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Automatic segmentation and classification of seven-segment display digits on auroral images

Automatic segmentation and classification of seven-segment display digits on auroral images
Automatic segmentation and classification of seven-segment display digits on auroral images
In this paper we describe a new and fully automatic method for segmenting and classifying digits in seven-segment displays. The method is applied to a dataset consisting of about 7 million auroral all-sky images taken during the time period of 1973–1997 at camera stations centred around Sodankylä observatory in northern Finland. In each image there is a clock display for the date and time together with the reflection of the whole night sky through a spherical mirror. The digitised film images of the night sky contain valuable scientific information but are impractical to use without an automatic method for extracting the date–time from the display. We describe the implementation and the results of such a method in detail in this paper
2193-0856
305-314
Savolainen, T.
cdd6cb97-7a8a-453b-986b-8acb55425a07
Whiter, D.K.
9a30d7b6-ea41-44fb-bd52-3ff1964eca5c
Partamies, N.
17fce18c-77e7-486c-bb53-a6156733fc9f
Savolainen, T.
cdd6cb97-7a8a-453b-986b-8acb55425a07
Whiter, D.K.
9a30d7b6-ea41-44fb-bd52-3ff1964eca5c
Partamies, N.
17fce18c-77e7-486c-bb53-a6156733fc9f

Savolainen, T., Whiter, D.K. and Partamies, N. (2016) Automatic segmentation and classification of seven-segment display digits on auroral images Geoscientific Instrumentation, Methods and Data Systems, 5, pp. 305-314. (doi:10.5194/gi-5-305-2016).

Record type: Article

Abstract

In this paper we describe a new and fully automatic method for segmenting and classifying digits in seven-segment displays. The method is applied to a dataset consisting of about 7 million auroral all-sky images taken during the time period of 1973–1997 at camera stations centred around Sodankylä observatory in northern Finland. In each image there is a clock display for the date and time together with the reflection of the whole night sky through a spherical mirror. The digitised film images of the night sky contain valuable scientific information but are impractical to use without an automatic method for extracting the date–time from the display. We describe the implementation and the results of such a method in detail in this paper

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Accepted/In Press date: 1 July 2016
e-pub ahead of print date: 21 July 2016
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 398309
URI: http://eprints.soton.ac.uk/id/eprint/398309
ISSN: 2193-0856
PURE UUID: cfadc472-b395-4339-9003-ca7f75e3ff92
ORCID for D.K. Whiter: ORCID iD orcid.org/0000-0001-7130-232X

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Date deposited: 22 Jul 2016 08:29
Last modified: 27 Oct 2017 16:34

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Contributors

Author: T. Savolainen
Author: D.K. Whiter ORCID iD
Author: N. Partamies

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