Sequential adaptive estimation for spectral reflectance based on camera responses

L Wang, X Wan, G Xiao, J Liang - Optics Express, 2020 - opg.optica.org
A sequential weighted nonlinear regression technique from digital camera responses is
proposed for spectral reflectance estimation. The method consists of two stages taking …

Spectral reflectance estimation using Gaussian processes and combination kernels

V Heikkinen - IEEE Transactions on Image Processing, 2018 - ieeexplore.ieee.org
This paper explores hyperspectral reflectance factor estimation using Gaussian process
regression with multispectral-and trichromatic measurements. Estimations are performed in …

Spectral imaging using consumer-level devices and kernel-based regression

V Heikkinen, C Cámara, T Hirvonen, N Penttinen - JOSA A, 2016 - opg.optica.org
Hyperspectral reflectance factor image estimations were performed in the 400–700 nm
wavelength range using a portable consumer-level laptop display as an adjustable light …

Optimized light source spectral power distribution for RGB camera based spectral reflectance recovery

L Wang, A Sole, JY Hardeberg, X Wan - Optics Express, 2021 - opg.optica.org
The accuracy of recovered spectra from camera responses mainly depends on the spectral
estimation algorithm used, the camera and filters selected, and the light source used to …

HCKBoost: Hybridized composite kernel boosting with extreme learning machines for hyperspectral image classification

U Ergul, G Bilgin - Neurocomputing, 2019 - Elsevier
Utilization of contextual information on the hyperspectral image (HSI) analysis is an
important fact. On the other hand, multiple kernels (MKs) and hybrid kernels (HKs) in …

Spectral imaging system

S Nath, D Das, S Gerald - US Patent 10,228,283, 2019 - Google Patents
ABSTRACT A spectral imaging system includes a spectrometer and an optics imaging
system. The spectrometer is operable for generating spectral signatures of objects from a …

Quantitative analysis of color characteristics for Yangjiabu New Year woodblock paintings based on color science and spectral imaging

F Zhang - Color Research & Application, 2023 - Wiley Online Library
The intangible cultural heritage of Yangjiabu New Year woodblock paintings (YNYWPs) has
numerous potential cultural, artistic, and economic values. The quantitative color …

Structure-preserving spectral reflectance estimation using guided filtering

F Sippel, J Seiler, N Genser, A Kaup - JOSA A, 2020 - opg.optica.org
Light spectra are a very important source of information for diverse classification problems,
eg, for discrimination of materials. To lower the cost of acquiring this information …

Improved estimation of reflectance spectra by utilizing prior knowledge

M Dierl, T Eckhard, B Frei, M Klammer, S Eichstädt… - JOSA A, 2016 - opg.optica.org
Estimating spectral reflectance has attracted extensive research efforts in color science and
machine learning, motivated through a wide range of applications. In many practical …

Trichromatic reflectance capture using a tunable light source: Setup, characterization and reflectance estimation

TM Tanksale, P Urban - 2016 - publica.fraunhofer.de
A research project is underway to develop a gonio imager particularly dedicated to sample
the Bidirectional Reflectance Distribution Function (BRDF) of materials and material …