Results 31 to 40 of about 4,498 (215)

An Empirical Assessment of Angular Dependency for RedEdge-M in Sloped Terrain Viticulture

Remote Sensing, 2019
For grape canopy pixels captured by an unmanned aerial vehicle (UAV) tilt-mounted RedEdge-M multispectral sensor in a sloped vineyard, an in situ Walthall model can be established with purely image-based methods.
Chizhang Gong, Henning Buddenbaum, Rebecca Retzlaff, Thomas Udelhoven   +3 more
doaj   +1 more source

Learning to Learn and Sample BRDFs

Computer Graphics Forum, 2023
AbstractWe propose a method to accelerate the joint process of physically acquiring and learning neural Bi‐directional Reflectance Distribution Function (BRDF) models. While BRDF learning alone can be accelerated by meta‐learning, acquisition remains slow as it relies on a mechanical process.
Chen Liu 0029, Michael Fischer 0011, Tobias Ritschel 0001   +2 more
openaire   +3 more sources

Relationship between Light Use Efficiency and Photochemical Reflectance Index Corrected Using a BRDF Model at a Subtropical Mixed Forest

Remote Sensing, 2020
Light use efficiency (LUE) is a key indicator of vegetation photosynthesis, which provides important insights into how vegetation productivity responds to environmental conditions.
Li Ma, Shaoqiang Wang, Jinghua Chen, Bin Chen, Leiming Zhang, Lixia Ma, Muhammad Amir, Leigang Sun, Guoyi Zhou, Ze Meng   +9 more
doaj   +1 more source

Development of a High Resolution BRDF/Albedo Product by Fusing Airborne CASI Reflectance with MODIS Daily Reflectance in the Oasis Area of the Heihe River Basin, China

Remote Sensing, 2015
A land-cover-based linear BRDF (bi-directional reflectance distribution function) unmixing (LLBU) algorithm based on the kernel-driven model is proposed to combine the compact airborne spectrographic imager (CASI) reflectance with the moderate resolution
Dongqin You, Jianguang Wen, Qing Xiao, Qiang Liu, Qinhuo Liu, Yong Tang, Baocheng Dou, Jingjing Peng   +7 more
doaj   +1 more source

Field Reflectance Measurements at Night of Beach and Desert Sands within a Particulate BRDF Model

Remote Sensing, 2022
The Bidirectional Reflectance Distribution Function (BRDF) of soils is frequently assumed to be Lambertian in remote sensing applications, even though many soils are observed to have a distinct backscatter.
John E. Wise, John C. Mars
doaj   +1 more source

BRDF Correction in Landsat Directional Reflectance Data by Combining Optimal BRDF Archetype With Spectral Characteristics

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The Landsat optical images have provided a unique long-term record of the terrestrial surface and have always been an important data source for earth observation.
Aojie Shen, Jie Shao, Xin Qi, Zhongzheng Zhu, Yujie Dai, Qi Zeng   +5 more
doaj   +1 more source

Radiometric Cross Calibration and Validation Using 4 Angle BRDF Model between Landsat 8 and Sentinel 2A

Remote Sensing, 2020
This work describes a proposed radiometric cross calibration between the Landsat 8 Operational Land Imager (OLI) and Sentinel 2A Multispectral Instrument (MSI) sensors.
M M Farhad, Morakot Kaewmanee, Larry Leigh, Dennis Helder   +3 more
doaj   +1 more source

Neural BRDFs: Representation and Operations

CoRR, 2021
Bidirectional reflectance distribution functions (BRDFs) are pervasively used in computer graphics to produce realistic physically-based appearance. In recent years, several works explored using neural networks to represent BRDFs, taking advantage of neural networks' high compression rate and their ability to fit highly complex functions. However, once
Jiahui Fan, Beibei Wang 0002, Milos Hasan, Jian Yang 0003, Ling-Qi Yan 0001   +4 more
openaire   +2 more sources

A method for monitoring solar diffuser’s bidirectional reflectance distribution function degradation in geostationary orbit

European Journal of Remote Sensing, 2020
The advanced geosynchronous radiation imager (AGRI) is a geostationary sensor whose reflective solar band is calibrated by a solar diffuser (SD). The SD bidirectional reflectance distribution function (BRDF) degrades over time in the space environment ...
Wei Wang, Li-Ming Zhang, Weiwei Xu, Xiao-Long Si, Wen-Xin Huang   +4 more
doaj   +1 more source

Two-dimensional BRDF estimation from polarisation

, 2008
This paper presents a novel technique for reflectance function (BRDF) estimation, which uses polarisation information and photometric stereo. The first stage of the technique is standard and involves the acquisition of polarisation information (angle and
Hancock, Edwin R., Atkinson, Gary
core   +1 more source