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Optical Engineering

Computer simulation of super-resolution point source image detection
Author(s): Jean-Pierre Fillard; H. M'timet; Jean-Marc Lussert; Michel Castagne
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Paper Abstract

We present a computer simulation of the analysis of an "infocus" two-dimensional (2-D) Airy disk. Two competing methods are used to calculate the coordinates of the center of this point spread function image. The first one is the classical technique that relies on the 2-D "centroid" of the image, and the second one is a more original method that uses the frequency dependence of the argument of the Fourier transform. Comparative simulations show that the latter technique [Fourier phase shift (FPS)] allows us to obtain a very good precision of better than 1% of a pixel spacing after quantization. Perturbations such as dc offset reduction, quantization noise, and additive Gaussian noise are introduced in the simulation. The results show that there is an improved perturbation immunity for the FPS method

Paper Details

Date Published: 1 November 1993
PDF: 9 pages
Opt. Eng. 32(11) doi: 10.1117/12.147720
Published in: Optical Engineering Volume 32, Issue 11
Show Author Affiliations
Jean-Pierre Fillard, Univ. de Montpellier II (France)
H. M'timet, Univ. de Montpellier II (France)
Jean-Marc Lussert, Univ. Montpellier II (France)
Michel Castagne, Univ. Montpellier II (France)

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