Phase-modulation method of evaluation for opto-electronic system resolution evaluating under the real image

Mikhail Vasiliy Smirnov; Alexander Nikoliy Korolev

doi:10.1117/12.243579

26 June 1996 Phase-modulation method of evaluation for opto-electronic system resolution evaluating under the real image

Mikhail Vasiliy Smirnov, Alexander Nikoliy Korolev

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Proceedings Volume 2753, Visual Information Processing V; (1996) https://doi.org/10.1117/12.243579
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

This article deals with the method analogous to photographic ones for determination of ultimate-resolved spatial frequency over a sine wave object. In these methods a resolution is searched graphically on a crossing of MTF curve with that of threshold contrast of a photographic material. A method of phase modulation of computer synthesized harmonic signal is offered. Digital image obtained with the help of the analyzed optical-electronic system is used. The digital image is previously differentiated and rationed. The modulated signal may be visualized, it will be seen on a monitor in a form of modulation bands. With increasing of frequency of a sine wave signal the visual perception of modulation bands will be worsened due to random character of modulation signal. This property is used to evaluate the ultimate-resolved spatial frequency. Methods of correlation analysis and methods of analysis in frequency area for automation of estimation process of ultimate-resolved frequency are discussed. Results of quality and quantity analysis for real images are presented.

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Mikhail Vasiliy Smirnov and Alexander Nikoliy Korolev "Phase-modulation method of evaluation for opto-electronic system resolution evaluating under the real image", Proc. SPIE 2753, Visual Information Processing V, (26 June 1996); https://doi.org/10.1117/12.243579

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KEYWORDS

Modulation

Image analysis

Krypton

Phase shift keying

Visibility

Photography

Spatial frequencies

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