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Calibrating the Elements of a Multispectral Imaging System

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We describe a method to calibrate the elements of a multispectral imaging system aimed at skylight imaging, which consists of a monochrome charge-coupled device (CCD) camera and a liquid crystal tunable filter. We demonstrate how to calibrate these two devices in order to build a multispectral camera that can obtain spectroradiometric measurements of skylight. Spectral characterizations of the tunable filter and the camera are presented together with a complete study of correcting temporal and spatial noise, which is of key importance in CCDs. We describe all the necessary steps to undertake this work and all the additional instrumentation that must be used to calibrate the radiometric devices correctly. We show how this complete study of our multispectral system allows us to use it as an accurate, high resolution spectroradiometer.

Document Type: Research Article


Affiliations: 1: Large Format Printing Division, Hewlett-Packard Spain, 08174 Sant Cugat del Vallès, Barcelona, Spain 2: Color Imaging Laboratory, Departamento de Óptica, Universidad de Granada, 18071 Granada, Spain 3: Departamento de Metrología, Instituto de Física Aplicada, CSIC, 28006 Madrid, Spain

Publication date: May 1, 2009

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  • The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.

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