Preliminary validation of leaf area index sensor in Huailai

Erli Cai; Xiuhong Li; Qiang Liu; Baocheng Dou; Chongyan Chang; Hailin Niu; Xingwen Lin; Jialin Zhang

doi:10.1117/12.2207616

9 December 2015 Preliminary validation of leaf area index sensor in Huailai

Erli Cai, Xiuhong Li, Qiang Liu, Baocheng Dou, Chongyan Chang, Hailin Niu, Xingwen Lin, Jialin Zhang

Proceedings Volume 9808, International Conference on Intelligent Earth Observing and Applications 2015; 98081C (2015) https://doi.org/10.1117/12.2207616
Event: International Conference on Intelligent Earth Observing and Applications, 2015, Guilin, China

Abstract

Leaf area index (LAI) is a key variable in many land surface models that involve energy and mass exchange between vegetation and the environment. In recent years, extracting vegetation structure parameters from digital photography becomes a widely used indirect method to estimate LAI for its simplicity and ease of use. A Leaf Area Index Sensor (LAIS) system was developed to continuously monitor the growth of crops in several sampling points in Huailai, China. The system applies 3G/WIFI communication technology to remotely collect crop photos in real-time. Then the crop photos are automatically processed and LAI is estimated based on the improved leaf area index of Lang and Xiang (LAILX) algorithm in LAIS. The objective of this study is to primarily verify the LAI estimated from LAIS (Lphoto) through comparing them with the destructive green LAI (Ldest). Ldest was measured across the growing season ntil maximum canopy development while plants are still green. The preliminary verification shows that Lphoto corresponds well with the Ldest (R2=0.975). In general, LAI could be accurately estimated with LAIS and its LAI shows high consistency compared with the destructive green LAI. The continuous LAI measurement obtained from LAIS could be used for the validation of remote sensing LAI products.

Citation Download Citation

Erli Cai, Xiuhong Li, Qiang Liu, Baocheng Dou, Chongyan Chang, Hailin Niu, Xingwen Lin, and Jialin Zhang "Preliminary validation of leaf area index sensor in Huailai", Proc. SPIE 9808, International Conference on Intelligent Earth Observing and Applications 2015, 98081C (9 December 2015); https://doi.org/10.1117/12.2207616

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Digital photography

Photography

Remote sensing

Sensors

Vegetation

Cameras

Image classification

Show All Keywords

Keywords/Phrases

Search In:

Publication Years