26 June 1996 Phase-modulation method of evaluation for opto-electronic system resolution evaluating under the real image
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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, Mikhail Vasiliy Smirnov, Alexander Nikoliy Korolev, 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); doi: 10.1117/12.243579; https://doi.org/10.1117/12.243579
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