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Article information
2016 , Volume 21, ¹ 3, p.80-90
Urmanov I.P., Kamaev A.N., Sorokin A.A., Korolev S.P.
The assessment of the visibility and the status of volcanoes using sequences of video observation images
Purpose. The problem for analysis of data on video observations of volcanic activity is hampered due to bad weather conditions. A significant number of acquired images appear to be non-informative because of low visibility, which prevents from seeing the observable object. In this connection, the question of developing algorithms and methods which make it possible to evaluate the visibility of the observable object on the images in an automated mode, is of vital importance. Based on the estimation and ranking made, the non-informative images can be discarded, which could significantly reduce the searching time for the necessary data and memory volumes for their storage. Methodology. In order to analyze the volcano visibility, the authors propose to distinguish its contours on an image with further comparison of them with the reference contours. The latter can be derived from 3 to 10 images of the volcano, which are manually selected by researchers and have been captured using video camera under ideal conditions. It is proposed that only those contours could be considered to be as the reference ones that are observable on no less than half of the captured images. The paper also considers the method for comparing the contours that allows insignificant fluctuations of the camera during imaging, caused, for example, by the wind blowing. To reduce the influence of the contours that do not belong to the observable object on the resultant visibility, the masking operation is suggested. Originality. Based on the proposed methods and algorithms, a computer program has been developed. To evaluate efficiency of its work, the acquired 1304 images of Shiveluch volcano have been processed. The results of estimation of the volcano visibility appeared to be consistent with the human perception of the volcano visibility on the images. Findings. The algorithms and methods proposed in the paper have shown their efficiency and reliability as applied to the problem of analysis of the volcano image visibility. The software tools are elaborated on their basis and will be embedded in the software platform “Signal”, which provides the work of the system of video observations for volcanoes in Kamchatka.
[full text]
Keywords: algorithm, image, outline, volcano, database, information system
Author(s):
Urmanov Igor Pavlovich
Position: researcher
Office: Computing Center FEB RAS
Address: 680000, Russia, Khabarovsk
Phone Office: (4212)703913
E-mail: uip1@mail.ru
Kamaev Aleksandr Nikolaevich
PhD.
Position: Research Scientist
Office: Computing Center FEB RAS
Address: 680000, Russia, Khabarovsk
Phone Office: (4212)227267
Sorokin Aleksei Anatolyevich
PhD.
Position: Leading research officer
Office: CC FEB RAS
Address: 680000, Russia, Khabarovsk, 65, Kim Yu Chen str.
Phone Office: (4212) 703913
E-mail: alsor@febras.net
SPIN-code: 1767-2259Korolev Sergey Pavlovich
Position: Research Scientist
Office: CC FEB RAS
Address: 680000, Russia, Khabarovsk, 65, Kim Yu Chen str.
Phone Office: (4212) 703913
E-mail: serejk@febras.net
SPIN-code: 5884-4506 References:
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Bibliography link:
Urmanov I.P., Kamaev A.N., Sorokin A.A., Korolev S.P. The assessment of the visibility and the status of volcanoes using sequences of video observation images // Computational technologies. 2016. V. 21. ¹ 3. P. 80-90
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