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

作者：Savolainen Tuomas^*; Whiter Daniel Keith; Partamies Noora

来源：Geoscientific Instrumentation, Methods and Data Systems, 2016, 5(2): 305-314.

DOI：10.5194/gi-5-305-2016

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 Sodankyla 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.

• 出版日期2016