Results 61 to 70 of about 5,784 (209)

Evaluating the potential of multi-view data extraction from small Unmanned Aerial Systems (UASs) for object-based classification for Wetland land covers

GIScience & Remote Sensing, 2019
Unmanned Aerial Systems (UASs) have the potential to provide multi-view data, but the approaches used to extract the multi-view data from UAS and investigation of their use in image classification are currently unavailable in publications to our best ...
Tao Liu, Amr Abd-Elrahman, Bon Dewitt, Scot Smith, Jon Morton, Victor L. Wilhelm   +5 more
doaj   +1 more source

Estimating Physically-Based Reflectance Parameters From a Single Image With GAN-Guided CNN

IEEE Access, 2022
We present a method that estimates the physically accurate reflectance of materials from a single image and reproduces real world materials which can be used in well-known graphics engines and tools.
Chi-Hyoung Rhee, Chang Ha Lee
doaj   +1 more source

One‐more‐vertex Next‐Event Estimation with Hierarchical Geometry Sampling

Computer Graphics Forum, EarlyView.
Abstract Robust next‐event estimation (NEE) remains a challenge in scenes characterized by sparse or small‐scale geometry where indirect illumination is the primary transport mechanism. In these scenes, traditional path construction, which relies on local directional sampling, often fails to find intersections with the sparse geometry, and standard NEE
Jorge Garcia‐Pueyo, Nestor Monzon, Adrian Jarabo, Adolfo Muñoz   +3 more
wiley   +1 more source

A Universal BRDF Archetype Database for Normalizing Directional Reflectance to Nadir BRDF Adjusted Reflectance

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Surface reflectance varies with changes in solar and viewing angles, exhibiting distinct anisotropic reflectance characteristics, which can be characterized using the bidirectional reflectance distribution function (BRDF).
Qianrui Xi, Hu Zhang, Junqin Xie, Xiaoning Zhang, Hongtao Cao, Yan Liu, Lei Cui, Yadong Dong   +7 more
doaj   +1 more source

Frequency‐Aware Spatial‐Angular Gaussians for Efficient Global Illumination Precomputation and Real‐Time Rendering

Computer Graphics Forum, EarlyView.
Abstract Precomputation and efficient approximate material models are well‐known approaches for achieving real‐time rendering with global illumination. Recent research in radiance fields and in particular 3D Gaussian Splatting has demonstrated the power of Gaussian primitives both to represent radiance and for fast optimization.
I. Shah, S. Lucas, G. Drettakis
wiley   +1 more source

First operational BRDF, albedo nadir reflectance products from MODIS [PDF]

, 2002
With the launch of NASA's Terra satellite and the MODerate Resolution Imaging Spectroradiometer (MODIS), operational Bidirectional Reflectance Distribution Function (BRDF) and albedo products are now being made available to the scientific community.
Privette, Jeffrey L., Lucht, Wolfgang, Strahler, Alan H, Jin, Yufang, Tsang, Trevor, d'Entremont, Robert P., Schaaf, Crystal B, Li, Xiaowen, Zhang, Xiaoyang, Hu, Baoxin, Gao, Feng, Muller, Jan-Peter, Roberts, Gareth, Roy, David, Strugnell, Nicholas C, Muller, Jan Peter, d’Entremont, Robert P, Strahler, Alan H., Barnsley, Michael, Disney, Mathias, Privette, Jeffrey L, Lewis, Philip, Dunderdale, Michael, Strugnell, Nicholas C., Liang, Shunlin, Doll, Christopher, Roy, David P., Hobson, Paul, Schaaf, Crystal B., Michael Barnsley   +29 more
core   +1 more source

A Neural Quality Metric for BRDF Models [PDF]

Accurately evaluating the quality of bidirectional reflectance distribution function (BRDF) models is essential for photo-realistic rendering. Traditional BRDF-space metrics often employ numerical error measures that fail to capture perceptual ...
Kavoosighafi, Behnaz, Unger, Jonas, Miandji, Ehsan, Hajisharif, Saghi, Mantiuk, Rafał K.   +4 more
core   +4 more sources

Beyond Spherical Harmonics: Rethinking Appearance Models for Radiance Reconstruction

Computer Graphics Forum, EarlyView.
Abstract View‐dependent appearance modeling remains a challenging problem in novel‐view synthesis and reconstruction. Accurately representing complex angular effects often requires substantial memory and computational resources. For new learning‐based methods, a common approach is to rely on Spherical Harmonics (SH).
Ewa Miazga, Jorge Condor, Piotr Didyk
wiley   +1 more source

Recent Trends in Inverse Rendering

Computer Graphics Forum, EarlyView.
This survey reviews 84 papers published between 2020 and 2025 on inverse rendering methods, introducing a taxonomy based on input data, scene representations, optimization strategies, and evaluation methods. We analyze emerging trends in neural, differentiable, and Gaussian‐splatting approaches, discuss applications, and identify key challenges and ...
S. Ullah, F. Pellacini, A. Giachetti
wiley   +1 more source

Anthropogenic and natural factors are associated with bird dawn chorus onset in subtropical East Asia

Ibis, EarlyView.
Anthropogenic factors such as artificial lighting at night (ALAN) and natural factors including temperature and moonlight can affect the dawn chorus pattern in birds. However, most studies are conducted in temperate regions. We investigated the effect of anthropogenic and natural factors on dawn chorus timing in eight species of bird across Hong Kong ...
Ann W. Y. To, Sarah A. Collins
wiley   +1 more source