A new method to estimate the leaf chlorophyll content from multiangular measurements: Anisotropy index

Z Sun, S Lu, K Omasa - IEEE Transactions on Geoscience and …, 2023 - ieeexplore.ieee.org
Anisotropy index (ANIX), which is defined as the ratio between the maximum and minimum
reflectance factors in the principal plane, has been applied in characterizing the optical …

Optimizing angular resistant spectral indices to estimate leaf biochemical parameters from multi-angular spectral reflection

D Ran, Z Sun, S Lu, K Omasa - Agricultural and Forest Meteorology, 2024 - Elsevier
Spectral indices are popular and simple mathematical methods for estimating leaf
biochemical parameters from spectral reflectance information. However, the estimation …

Laboratory research on polarized optical properties of saline-alkaline soil based on semi-empirical models and machine learning methods

Q Gu, Y Han, Y Xu, H Yao, H Niu, F Huang - Remote Sensing, 2022 - mdpi.com
Currently, soil salinization is a serious problem affecting agricultural production and human
settlements. Remote sensing techniques have the advantages of a large monitoring range …

Reducing BRDF effects on the estimation of leaf biochemical parameters using the nonpolarized reflectance factor in the hemispheric space

C Yao, Z Sun, S Lu - IEEE Transactions on Geoscience and …, 2022 - ieeexplore.ieee.org
Leaf bidirectional reflectance distribution function (BRDF) is partly controlled by the specular
reflection from the leaf surface, which does not convey information about leaf biochemical …

Combining multiangular, polarimetric, and hyperspectral measurements to estimate leaf nitrogen concentration from different plant species

M Liu, Z Sun, S Lu, K Omasa - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Optical remote sensing is one of the most popular methods for estimating leaf nitrogen
concentration (LNC). This nondestructive approach based on reflected intensity …

Improvement of leaf chlorophyll content estimation using spectral indices from nonpolarized reflectance factor in the laboratory and field

Y Li, Z Sun, S Lu, K Omasa - IEEE Journal of Selected Topics in …, 2020 - ieeexplore.ieee.org
Optical properties of light reflected from leaves can be described by both intensity and
polarization, however, most studies focused on the intensity in the estimation of plant leaf …

Spectral Polarization Image Reconstruction Using Compressed Sensing Method

Y Zhang, H Li, J Sun, X Zhang… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The coded aperture snapshot spectral imager (CASSI) system measures multidimensional
signals by compressing the original signal into a 2-D snapshot and then reconstructs the …

Optical properties of snow surfaces: Multiangular photometric and polarimetric hyperspectral measurements

Z Sun, D Wu, Y Lv - IEEE Transactions on Geoscience and …, 2021 - ieeexplore.ieee.org
Understanding the optical properties of light reflected from snow surfaces is fundamental for
remote sensing-based characterizations of snow properties and quantification of radiative …

Effects of surface roughness and albedo on depolarization in Mueller matrices

LW Li, RA Chipman… - … , Analysis, and Remote …, 2020 - spiedigitallibrary.org
The Mueller matrix dependence on an objects' albedo and surface texture are measured
and these effects are used to inform modifications to a microfacet model for polarized light …

On the negative polarization's effects at top of atmosphere

W Chen, Y Xu, Q Fu - Atmospheric Environment, 2021 - Elsevier
Polarized signal has been proven to be sensitive to the aerosol optical depth and aerosol
microphysical parameters. However, in most current applications, the directions of …