Low Cost Recovery of Spectral Power Distributions
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Measuring the spectral power distribution of a light source, that is, the emission as a function of wavelength, typically requires the use of spectrophotometers or multispectral cameras. Here, we propose a low-cost system that enables the recovery of the visible light spectral signature of different types of light sources without requiring highly complex or specialized equipment and using just off-the-shelf, widely available components. To do this, a standard DSLR camera and a diffraction filter are used, sacrificing the spatial dimension for spectral resolution. We present here the image formation model and the calibration process necessary to recover the spectrum, including spectral calibration and amplitude recovery. We also show applications of the system in image processing and rendering.
Description
@inproceedings{10.2312:ceig.20141112,
booktitle = {Spanish Computer Graphics Conference (CEIG)},
editor = {Adolfo Munoz and Pere-Pau Vazquez},
title = {{Low Cost Recovery of Spectral Power Distributions}},
author = {Alvarez, Sara and Presa, Lara and Kunkel, Timo and Masia, Belen},
year = {2014},
publisher = {The Eurographics Association},
ISBN = {978-3-905674-67-5},
DOI = {10.2312/ceig.20141112}
}