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Journal of Electronic Imaging

Natural image database and its use for scene illuminant estimation
Author(s): Shoji Tominaga
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Paper Abstract

This paper describes a database collecting natural color images, called the Natural Image Database, and shows how it is used for illuminant estimation problems. First, we present significant features of the database. This database is not only a collection of color images of natural scenes, but also includes scene illuminant spectra and camera calibration data. Because these data sets are available via the Internet at, the database can be used as the calibrated common test data for evaluating the performance of illuminant estimation algorithms. Second, we focus on two illuminant estimation methods, the subspace method for estimating scene illuminant spectra and the sensor correlation method for classifying illuminant color temperature. The algorithms are briefly described. The former is based on the linear model representation of possible illuminant spectra, and the latter is based on correlation computation between an observed image and the reference illuminant gamuts. The performance of these algorithms is evaluated using the database.

Paper Details

Date Published: 1 October 2002
PDF: 11 pages
J. Electron. Imaging. 11(4) doi: 10.1117/1.1501135
Published in: Journal of Electronic Imaging Volume 11, Issue 4
Show Author Affiliations
Shoji Tominaga, Osaka Electro-Communication Univ. (Japan)

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