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 ob...
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2016
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ftdoajarticles:oai:doaj.org/article:315937e820214d0aa34dd64cb689d008 2023-05-15T17:42:24+02:00 Automatic segmentation and classification of seven-segment display digits on auroral images T. Savolainen D. K. Whiter N. Partamies 2016-07-01T00:00:00Z https://doi.org/10.5194/gi-5-305-2016 https://doaj.org/article/315937e820214d0aa34dd64cb689d008 EN eng Copernicus Publications http://www.geosci-instrum-method-data-syst.net/5/305/2016/gi-5-305-2016.pdf https://doaj.org/toc/2193-0856 https://doaj.org/toc/2193-0864 2193-0856 2193-0864 doi:10.5194/gi-5-305-2016 https://doaj.org/article/315937e820214d0aa34dd64cb689d008 Geoscientific Instrumentation, Methods and Data Systems, Vol 5, Iss 2, Pp 305-314 (2016) Geophysics. Cosmic physics QC801-809 article 2016 ftdoajarticles https://doi.org/10.5194/gi-5-305-2016 2022-12-31T15:39:02Z 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. Article in Journal/Newspaper Northern Finland Sodankylä Directory of Open Access Journals: DOAJ Articles Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Geoscientific Instrumentation, Methods and Data Systems 5 2 305 314 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Geophysics. Cosmic physics QC801-809 T. Savolainen D. K. Whiter N. Partamies Automatic segmentation and classification of seven-segment display digits on auroral images |
topic_facet |
Geophysics. Cosmic physics QC801-809 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
T. Savolainen D. K. Whiter N. Partamies |
author_facet |
T. Savolainen D. K. Whiter N. Partamies |
author_sort |
T. Savolainen |
title |
Automatic segmentation and classification of seven-segment display digits on auroral images |
title_short |
Automatic segmentation and classification of seven-segment display digits on auroral images |
title_full |
Automatic segmentation and classification of seven-segment display digits on auroral images |
title_fullStr |
Automatic segmentation and classification of seven-segment display digits on auroral images |
title_full_unstemmed |
Automatic segmentation and classification of seven-segment display digits on auroral images |
title_sort |
automatic segmentation and classification of seven-segment display digits on auroral images |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/gi-5-305-2016 https://doaj.org/article/315937e820214d0aa34dd64cb689d008 |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Sodankylä |
geographic_facet |
Sodankylä |
genre |
Northern Finland Sodankylä |
genre_facet |
Northern Finland Sodankylä |
op_source |
Geoscientific Instrumentation, Methods and Data Systems, Vol 5, Iss 2, Pp 305-314 (2016) |
op_relation |
http://www.geosci-instrum-method-data-syst.net/5/305/2016/gi-5-305-2016.pdf https://doaj.org/toc/2193-0856 https://doaj.org/toc/2193-0864 2193-0856 2193-0864 doi:10.5194/gi-5-305-2016 https://doaj.org/article/315937e820214d0aa34dd64cb689d008 |
op_doi |
https://doi.org/10.5194/gi-5-305-2016 |
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Geoscientific Instrumentation, Methods and Data Systems |
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5 |
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305 |
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314 |
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