Potential applications of near infra-red hemispherical imagery in forest environments
- 作者：Lee Chapman
- 关键词：Hemispherical fisheye ; Near infra-red ; NDVI ; View factors
- 刊名：Agricultural and Forest Meteorology
- 出版年：2007
- 期刊代码：2_01681923
- 类别：abs
- 出版时间：16 March 2007
- 卷：143
- 期：1-2
- 页码：151-156
- 文件大小：780 K
摘要
Hemispherical photography is commonly used in studies investigating the light environment beneath the forest canopy. This paper documents a methodology to adapt a standard digital camera to take hemispherical images in the near infra-red. These images can then be post processed to calculate sky-view factors, branch/bole-view factors and foliage-view factors. The further potential of the instrument is then demonstrated by combining the near infra-red images with standard visible images to produce a hemispherical NDVI image. Further discussion is also given to the potential applicability of the techniques above the forest canopy.