Dr. Nasrin Reza Profile

Dr. Nasrin Reza

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Proceedings Article | 26 August 2010 Paper

Optimal design of Toraldo super-resolving filters

L. Hazra, N. Reza

Proceedings Volume 7787, 77870D (2010) https://doi.org/10.1117/12.858883

KEYWORDS: Super resolution, Point spread functions, Diffraction, 3D image processing, Nonlinear filtering, Computer programming, Imaging systems, Image resolution, Microscopy, Image filtering

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Pupil plane filtering provides a convenient technique for modifying the point spread function. Such modifications are used in many practical applications that require enhancement of selective frequency band in images. Also, in many new imaging paradigms, acquisition of 3D image information calls for tailoring of the 3D point spread function. This can be achieved by suitable pupil plane filtering, preferably by phase filters. By using a pupil plane filter with an array of concentric annuli, the point spread function can be tailored in a fashion such that a narrow central lobe is surrounded by neighboring lobes of low amplitude, with one or more lobes of high amplitude spaced far away from the center. In our study we intend to explore the use of phase annuli as pupil filters in tailoring of both transverse and axial resolution. Determination of such phase filters in accordance with a set of prespecified requirements for amplitude/intensity distribution around the focus constitutes a problem of nonlinear optimization. This paper reports some results of our preliminary investigations on an application of evolutionary programming in solving this problem to obtain globally or quasi-globally optimum solutions.

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