Results 151 to 160 of about 406,860 (186)

Red edge shift and biochemical content in grass canopies

ISPRS Journal of Photogrammetry and Remote Sensing, 2007
The concentration of foliar nitrogen in tropical grass is one of the factors that explain the distribution of wildlife. Therefore, the remote sensing of foliar nitrogen contributes to a better understanding of wildlife feeding patterns. This study evaluated changes in the red edge position of the 680 nm continuum removed chlorophyll feature in the ...
Onisimo Mutanga
exaly   +4 more sources

Corn hyperspectra and their red edge characteristics

SPIE Proceedings, 2004
The hyperspectral reflectance of the canopy in field, the first and the third unfold leaves from the top of corn are measured indoor in different stages by a ASD FieldSpec Pro FR. The concentrations of chlorophyll and carotenoid of leaves corresponding to the spectra are determined by biochemical method.
Xiuzhen Wang, Jingfeng Huang, Yanlin Tang, Fumin Wang   +3 more
openaire   +1 more source

The red edge of plant leaf reflectance

International Journal of Remote Sensing, 1983
A detailed study of the red edge spectral feature of green vegetation based on laboratory reflectance spectrophotometry is presented. A parameter lambda is defined as the wavelength is defined as the wavelength of maximum slope and found to be dependent on chlorophyll concentration.
D. N. H. HORLER, M. DOCKRAY, J. BARBER
openaire   +1 more source

Red-edge-excitation fluorescence spectroscopy of indole and tryptophan

European Biophysics Journal, 1988
Studies on the dependence of indole and tryptophan fluorescence emission spectra on excitation wavelength, lambda ex, show that the emission shifts to longer wavelengths for red-edge excitation in different solid and viscous solvents. In solid systems the spectral shifts for excitation in the range from 290 to 310 nm can reach tens of nm, and they are ...
A P, Demchenko, A S, Ladokhin
openaire   +2 more sources

RED EDGE EXCITATION EFFECT IN INTACT EYE LENS

Photochemistry and Photobiology, 1989
Abstract—Shift in the wavelength of emission upon shift in the excitation wavelength towards the red edge of the absorption band is termed Red Edge Excitation Shift (REES). This effect is observed only in a situation where the fluorophore mobility with respect to the surrounding matrix is considerably reduced.
C M, Rao, S C, Rao, P B, Rao
openaire   +2 more sources

Red edge point detection for mulberry leaf

2017 1st International Conference on Intelligent Systems and Information Management (ICISIM), 2017
Red Edge point (R E P) is very much related with chlorophyll foliar concentration and contents. Deep absorption of chlorophyll a and chlorophyll b affects the sudden change in region starting from 680 nm to 800 nm of green vegetation reflectance spectrum. Greenness area of the observation can be recognized by Red Edge Point.
Kavita Bhosle, Vijaya Musande
openaire   +1 more source

On the Red Edge of the δ Scuti Instability Strip

Chinese Journal of Astronomy and Astrophysics, 2002
The delta Scuti star catalogue is used to derive the observational locations of such stars on the HR diagram. The theoretical and observational instability strips are compared to check the theoretical red edge obtained by considering non-local time-dependent convection theory. The observational instability strip almost overlaps with the theoretical one,
Yan Xu, Zhi-Ping Li, Li-Cai Deng, Da-Run Xiong   +3 more
openaire   +1 more source

Comparative analysis of red-edge hyperspectral indices

Advances in Space Research, 2003
Using 3 nm bandwidth observations over the growth cycle of wheat in 680–820 nm range, the point of inflection was identified through differentiation and it was at 729 nm corresponding to peak observed at 64 days after sowing (DAS). To provide physical basis for various red edge hyperspectral indices reported in literature, the ratio indices (RI ...
R.K. Gupta, D. Vijayan, T.S. Prasad
openaire   +1 more source

Shape of the red edge as vitality indicator for plants

International Journal of Remote Sensing, 1990
Abstract The shift of the red edge in the reflection spectra of vegetation targets is a known phenomenon documenting changes in the biological status of plants. In our study we analysed the variability of red edge reflection in dependency of differently managed field plots, The results indicate that the red edge is not fully described by the shift of ...
F. BOOCHS, G. KUPFER, K. DOCKTER, W. KÜHBAUCH   +3 more
openaire   +1 more source