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

Savolainen, Tuomas; Whiter, Daniel Keith; Partamies, Noora

doi:https://doi.org/10.5194/gi-5-305-2016

Articles | Volume 5, issue 2

https://doi.org/10.5194/gi-5-305-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Multi-disciplinary research and integrated monitoring at the...

https://doi.org/10.5194/gi-5-305-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 5, issue 2

Research article

|

21 Jul 2016

Research article |

| 21 Jul 2016

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

Tuomas Savolainen, Daniel Keith Whiter, and Noora Partamies

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Final revised paper (published on 21 Jul 2016)
Preprint (discussion started on 19 Jan 2016)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Excellent paper', Anonymous Referee #1, 24 Feb 2016
- AC1: 'Ambiguity in the description of the image data', Tuomas Savolainen, 26 Feb 2016
RC2: 'Good Work. Presentation needs structuring', Anonymous Referee #2, 02 Mar 2016
- AC2: 'Structural changes', Tuomas Savolainen, 10 Mar 2016

Short summary

In this paper we describe a new method for recognition of digits in seven-segment displays. The method is used for adding date and time information 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.