
Proceedings Paper
Measurement and analysis of the point spread function with regard to straylight correctionFormat | Member Price | Non-Member Price |
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Paper Abstract
Stray light is the part of an image that is formed by misdirected light. I.e. an ideal optic would map a point of
the scene onto a point of the image. With real optics however, some parts of the light get misdirected. This is
due to effects like scattering at edges, Fresnel reflections at optical surfaces, scattering at parts of the housing,
scattering from dust and imperfections – on and inside of the lenses – and further reasons. These effects lead to
errors in colour-measurements using spectral radiometers and other systems like scanners. Stray light is further
limiting the dynamic range that can be achieved with High-Dynamic-Range-Technologies (HDR) and can lead
to the rejection of cameras due to quality considerations. Therefore it is of interest, to measure, quantify and
correct these effects. Our work aims at measuring the stray light point spread function (stray light PSF) of
a system which is composed of a lens and an imaging sensor. In this paper we present a framework for the
evaluation of PSF-models which can be used for the correction of straylight. We investigate if and how our
evaluation framework can point out errors of these models and how these errors influence straylight correction.
Paper Details
Date Published: 27 February 2015
PDF: 13 pages
Proc. SPIE 9404, Digital Photography XI, 940406 (27 February 2015); doi: 10.1117/12.2078333
Published in SPIE Proceedings Vol. 9404:
Digital Photography XI
Nitin Sampat; Radka Tezaur; Dietmar Wüller, Editor(s)
PDF: 13 pages
Proc. SPIE 9404, Digital Photography XI, 940406 (27 February 2015); doi: 10.1117/12.2078333
Show Author Affiliations
Julian Achatzi, Fachhochschule Köln (Germany)
Gregor Fischer, Fachhochschule Köln (Germany)
Volker Zimmer, Leica Camera AG (Germany)
Gregor Fischer, Fachhochschule Köln (Germany)
Volker Zimmer, Leica Camera AG (Germany)
Published in SPIE Proceedings Vol. 9404:
Digital Photography XI
Nitin Sampat; Radka Tezaur; Dietmar Wüller, Editor(s)
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