발간년도 : [2015]
| 논문정보 |
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| 논문명(한글) |
[Vol.10, No.5] Freezing Analysis Based on River Flow Comparison of Digital Time-lapse Camera |
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| 논문투고자 |
Kwon Oh-Sung |
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| 논문내용 |
In Korea, the one important indicator of seasonal change is the first freezing time of Han river. Until today, the observation method of river freezing phenomenon is visual inspection methods by observers. However, The method has a severe weakness which is often biased by observer's subjective. As a result, it is required the more objective and stable observation method to analyze river's freezing process. In this paper, we installed the remote observation camera on the Han river bridge for our several experiments. Our work has performed during 30 days from December 1, 2014 using the observation camera system. First of all, We examined the variation patterns of the gray-scale intensity value array. The extracted feature values was recomputed and normalized based on the photographing condition of the observation image area. And We applied several image processing techniques to extract the freezing values. consequentially, We could observe several significant features for analyzing the freezing process of Han river. We could analysis the freezing degree using by the ratio between the frozen and normal river area. In experiments, we could identify that the average gray-scale Intensity of observing area was close to 0 as time passed. We could confirm that our proposed method was a stable process for finding frozen river area. |
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