A new method of leaf area index measurement based on the digital images

作者：Zhong Chuanqi; Chen Yunping; Tong Ling; Huang Jia; Liang Jiaming

来源：37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017, 2017-07-23 To 2017-07-28.

DOI：10.1109/IGARSS.2017.8127963

With the development of technology of digital camera, the performance of image sensor is continuously improving, which makes it possible to measure leaf area index by digital photos in a simpler and cheaper way compared with the other ways. This article proposed a new way to measure LAI by using digital images, and the formulation of measuring LAI is deduced from both the principle of LAI2000 and theory of digital camera. Considering the system error, the modified formula is also deduced. In this article, there are about 35 measurement locations which include kinds of different density of canopy, where the LAI were measured by both proposed method and professional instrument LAI2000 to validate the accuracy. The experiment results show that the correlation coefficient was 0.9794 between the proposed method and LAI2000, which proved the accuracy and feasibility of measurement of LAI based on digital photos. The new method has a bright application prospect.

• 出版日期2017
• 单位电子科技大学