Hyperspectral reflectance measurements for estimating eco-physiological status of plants

Yoshio Inoue; Josep Penueleus; Yann Nouevllon; M. Susan Moran

doi:10.1117/12.417003

8 February 2001 Hyperspectral reflectance measurements for estimating eco-physiological status of plants

Yoshio Inoue, Josep Penueleus, Yann Nouevllon, M. Susan Moran

Proceedings Volume 4151, Hyperspectral Remote Sensing of the Land and Atmosphere; (2001) https://doi.org/10.1117/12.417003
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

Abstract

An AOTF-based spectral imager was developed for hyperspectral measurement of plant reflectance in the field. A hyperspectral image cube for the spectral region between 450 nm-900 nm can be obtained at 3 to 5 nm resolution intervals within a few seconds. The system is light and compact, and both the spectral wavelengths and intervals are programmable with PC control. Wavelengths can be rapidly tuned, either sequentially or randomly. Hyperspectral measurements were taken over plant leaves and canopies using the AOTF system and a high-resolution radiometer. Both the leaf nitrogen and chlorophyll contents of the rice canopies were well estimated by multiple regression of high- resolution data in the visible and near-IR regions. A weak signal at 970nm and its normalized indices were found to be useful for estimation of leaf water content. An approach of model inversion was enabled by the use of hyperspectral data. A close and linear relation was found between measured and retrieved water contents. Further, an analysis based on concurrent measurements of hyperspectral reflectance and canopy gas exchange by eddy-covariance method suggested the potential of normalized weak signal for the spectral assessment of canopy CO₂ uptake. The hyperspectral reflectance measurement has great potential for estimating the ecological and physio-chemical variables of plant leaves and canopies.

Citation Download Citation

Yoshio Inoue, Josep Penueleus, Yann Nouevllon, and M. Susan Moran "Hyperspectral reflectance measurements for estimating eco-physiological status of plants", Proc. SPIE 4151, Hyperspectral Remote Sensing of the Land and Atmosphere, (8 February 2001); https://doi.org/10.1117/12.417003

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