Year-to-year blooming phenology observation using time-lapse digital camera images
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- NAGAI Shin
- Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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- YOSHITAKE Shinpei
- River Basin Research Center, Gifu University
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- INOUE Tomoharu
- Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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- SUZUKI Rikie
- Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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- MURAOKA Hiroyuki
- River Basin Research Center, Gifu University
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- NASAHARA Kenlo Nishida
- Faculty of Life and Environmental Sciences, University of Tsukuba
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- SAITOH Taku M
- River Basin Research Center, Gifu University
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Abstract
Long-term continuous phenological observation of cherry tree blooming is an important and challenging task in the evaluation of year-to-year weather and climate changes in spring in Japan. Here, (1) we performed daily field observations with a time-lapse digital camera in a deciduous broad-leaved forest in Japan from January 2004 to December 2013; and (2) we detected year-to-year variations in the blooming phenology of Prunus sargentii by visual inspection of the images and by image analysis. We found that (1) the red digital numbers (i.e., the digital intensity values of the red pixels; DNR) extracted from the time-lapse digital camera images tended to peak in full bloom; and (2) the green excess index (GEI) (based on the red, green, and blue digital numbers) tended to be lowest in full bloom. These results indicate that DNR and GEI are useful for detecting the timing of full bloom in P. sargentii.
Journal
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- Journal of Agricultural Meteorology
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Journal of Agricultural Meteorology 70 (3), 163-170, 2014
The Society of Agricultural Meteorology of Japan
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Details 詳細情報について
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- CRID
- 1390282679645859200
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- NII Article ID
- 130004687437
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- NII Book ID
- AA11530034
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- ISSN
- 18810136
- 00218588
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- NDL BIB ID
- 025809599
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed