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Scaling-up and model inversion methods with narrowband optical indices for chlorophyll content estimation in closed forest canopies with hyperspectral data
Study of the merit function in the numerical inversion showed that red edge optical indices used in the minimizing function such as R/sub 750//R/sub 710/ perform better than when all single spectral reflectance channels from hyper-spectral airborne CASI data are used, and in addition, the effect of shadows and LAI variation are minimized. Expand
Leaf chlorophyll content retrieval from airborne hyperspectral remote sensing imagery
Abstract Hyperspectral remote sensing has great potential for accurate retrieval of forest biochemical parameters. In this paper, a hyperspectral remote sensing algorithm is developed to retrieveExpand
Vegetation stress detection through chlorophyll a + b estimation and fluorescence effects on hyperspectral imagery.
A derivative chlorophyll index (DCI) was developed, a function of the combined effects of CF and Ca + b content, and used it to detect vegetation stress and accurately estimated the effective quantum yield by inverting the FRT-PROSPECT model. Expand
Needle chlorophyll content estimation through model inversion using hyperspectral data from boreal conifer forest canopies
Leaf chlorophyll content in coniferous forest canopies, a measure of stand condition, is the target of studies and models linking leaf reflectance and transmittance and canopy hyperspectralExpand
Estimating chlorophyll concentration in conifer needles with hyperspectral data: An assessment at the needle and canopy level
Abstract This investigation quantitatively links chlorophyll a  +  b (chl  a +  b ) concentration, a physiological marker of forest health condition, to hyperspectral observations of Jack Pine (Expand
Chlorophyll Fluorescence Effects on Vegetation Apparent Reflectance: I. Leaf-Level Measurements and Model Simulation
Results from a series of laboratory measurements of spectral reflectance and transmittance of individual leaves and from a modeling study are presented which demonstrate that effects of naturalExpand
An individual tree crown delineation method based on multi-scale segmentation of imagery
A new method for individual tree crown delineation from optical imagery was proposed based on multi-scale filtering and segmentation based on the dominant sizes of tree crowns and yielded high-quality tree crown maps. Expand
Chlorophyll fluorescence effects on vegetation apparent reflectance: II. laboratory and airborne canopy-level measurements with hyperspectral data.
Abstract Relationships found between Compact Airborne Spectrographic Imager (CASI) hyperspectral canopy reflectance measurements at laboratory and field levels with PAM-2000 chlorophyll fluorescenceExpand
Critical period of interspecific competition for northern conifers associated with herbaceous
Using critical-period analysis, the temporal effects of interspecific competition from herbaceous vegetation on seedlings of jack pine, red pine, eastern white pine, and black spruce during the first 5 years after planting are examined. Expand
Maturation, germination, and conversion of norway spruce (Picea abies L.) somatic embryos to plants
Long-term growth and development potential of conifer somatic embryo plants are verified and mean germination frequencies were improved on treatments which avoided immersion of the radicle in medium solidified with agar. Expand