Filter-free color image sensor based on CsPbBr 3− 3n X 3n (X= Cl, I) single crystals

P Zhang, Y Hua, X Li, L Zhang, L Liu, R Li… - Journal of Materials …, 2021 - pubs.rsc.org
Narrowband photodetectors are critical for the application of sensors in imaging systems,
spectroscopic photodetectors, and optical communication. All-inorganic mixed-halide …

[HTML][HTML] Matching CIE illuminants to measured spectral power distributions: A method to evaluate non-visual potential of daylight in two European cities

L Bellia, U Błaszczak, F Fragliasso, L Gryko - Solar Energy, 2020 - Elsevier
The evaluation of non-visual effects of light is a crucial topic in lighting design research and
practice. Performing such analysis requires precise information about the spectral …

Recovering spectral data from natural scenes with an RGB digital camera and colored filters

EM Valero, JL Nieves, SMC Nascimento… - Color Research & …, 2007 - Wiley Online Library
Many spectral‐recovery methods using RGB digital cameras assume the underlying
smoothness of illuminant and reflectance spectra, and apply low‐dimensional linear models …

Recovery of spectral reflectances of objects being imaged by multispectral cameras

N Shimano, K Terai, M Hironaga - JOSA A, 2007 - opg.optica.org
Acquisition of spectral information of objects being imaged through the use of sensor
responses is important to reproduce color images under various illuminations. In the past …

Using weighted pseudo‐inverse method for reconstruction of reflectance spectra and analyzing the dataset in terms of normality

V Babaei, SH Amirshahi… - Color Research & …, 2011 - Wiley Online Library
Most of spectral estimation methods are based on improving the learning‐based procedures
which mainly modify the training sets used by the basic methods. In this article, a new …

Designing color filters that make cameras more colorimetric

GD Finlayson, Y Zhu - IEEE Transactions on Image Processing, 2020 - ieeexplore.ieee.org
When we place a colored filter in front of a camera the effective camera response functions
are equal to the given camera spectral sensitivities multiplied by the filter spectral …

Selecting algorithms, sensors, and linear bases for optimum spectral recovery of skylight

MA López-Álvarez, J Hernández-Andrés, EM Valero… - JOSA A, 2007 - opg.optica.org
In a previous work [Appl. Opt. 44, 5688 (2005)] we found the optimum sensors for a planned
multispectral system for measuring skylight in the presence of noise by adapting a linear …

Comparative performance analysis of spectral estimation algorithms and computational optimization of a multispectral imaging system for print inspection

EM Valero, Y Hu, J Hernández‐Andrés… - Color Research & …, 2014 - Wiley Online Library
We have analyzed the performance of simulated multispectral systems for the spectral
recovery of reflectance of printer inks from camera responses, including noise. To estimate …

Retrieval of the optical depth using an all-sky CCD camera

FJ Olmo, A Cazorla, L Alados-Arboledas… - Applied …, 2008 - opg.optica.org
A new method is presented for retrieval of the aerosol and cloud optical depth using a CCD
camera equipped with a fish-eye lens (all-sky imager system). In a first step, the proposed …

Differentiating biological colours with few and many sensors: spectral reconstruction with RGB and hyperspectral cameras

JE Garcia, MB Girard, M Kasumovic, P Petersen… - PLoS …, 2015 - journals.plos.org
Background The ability to discriminate between two similar or progressively dissimilar
colours is important for many animals as it allows for accurately interpreting visual signals …