NDLI: A framework for the experimental comparison of solar and skydome illumination

Content Provider	ACM Digital Library
Author	Knowlton, Daniel Kider, Joseph T. Greenberg, Donald P. Li, Yining Karl Newlin, Jeremy
Copyright Year	2014
Abstract	The illumination and appearance of the solar/skydome is critical for many applications in computer graphics, computer vision, and daylighting studies. Unfortunately, physically accurate measurements of this rapidly changing illumination source are difficult to achieve, but necessary for the development of accurate physically-based sky illumination models and comparison studies of existing simulation models. To obtain baseline data of this time-dependent anisotropic light source, we design a novel acquisition setup to simultaneously measure the comprehensive illumination properties. Our hardware design simultaneously acquires its spectral, spatial, and temporal information of the skydome. To achieve this goal, we use a custom built spectral radiance measurement scanner to measure the directional spectral radiance, a pyranometer to measure the irradiance of the entire hemisphere, and a camera to capture high-dynamic range imagery of the sky. The combination of these computer-controlled measurement devices provides a fast way to acquire accurate physical measurements of the solar/skydome. We use the results of our measurements to evaluate many of the strengths and weaknesses of several sun-sky simulation models. We also provide a measurement dataset of sky illumination data for various clear sky conditions and an interactive visualization tool for model comparison analysis available at http://www.graphics.cornell.edu/resources/clearsky/.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	07300301
e-ISSN	15577368
DOI	10.1145/2661229.2661259
Volume Number	33
Issue Number	6
Journal	ACM Transactions on Graphics (TOG)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-11-19
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Measurements Skylight models Spectral Validation
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Scattering: Acquisition, Modeling, and Rendering

Adding a Solar-Radiance Function to the Hošek-Wilkie Skylight Model

An analytic model for full spectral sky-dome radiance

Trichromatic approximation for computer graphics illumination models

A wavelet-based framework for acquired radiometric quantity representation and accurate physical rendering

An experimental comparison of RGB, YIQ, LAB, HSV, and opponent color models

Five principles for the formal validation of models of software metrics

A framework for precomputed and captured light transport

$\textit{envyLight}:$ an interface for editing natural illumination

A framework for the experimental comparison of solar and skydome illumination

Similar Documents

Scattering: Acquisition, Modeling, and Rendering

Adding a Solar-Radiance Function to the Ho&#x161;ek-Wilkie Skylight Model

An analytic model for full spectral sky-dome radiance

Trichromatic approximation for computer graphics illumination models

A wavelet-based framework for acquired radiometric quantity representation and accurate physical rendering

An experimental comparison of RGB, YIQ, LAB, HSV, and opponent color models

Five principles for the formal validation of models of software metrics

A framework for precomputed and captured light transport

$\textit{envyLight}:$ an interface for editing natural illumination

A framework for the experimental comparison of solar and skydome illumination

Adding a Solar-Radiance Function to the Hošek-Wilkie Skylight Model