2013 Fiscal Year Final Research Report
Development of the image processing system with remotely sensed data for plantation forest thinning support
| Project/Area Number |
24780145
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Forest science
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 空中写真 / 施業区画 / 人工林 / 境界 / 林齢 / 立木密度 / 局所最大値フィルタ法 / ローパスフィルタ |
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| Research Abstract |
We propose a new method of extracting plantation boundary through multi-temporal image analysis using past aerial photos which have been taken by the Forestry Agency and the Geographical Survey Institute, Japan. Clear cut and planted sites were extracted with the second principal component of the principal component analysis of a two-year composite image of brightness or DSM data. This proposed method presented the possibility to delineate the boundary of the plantation.
We focused on local maximum filtering method as one of the extraction methods for single tree apex, and performed the stand density estimation of Japanese cedar plantation using GeoEye-1 panchromatic image (0.5-m spatial resolution). In this paper, we examined about the effect of filter size of maximum filter or low-pass filter for noise reduction on stand density estimation.
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