&lt;title&gt;Synthesized phase objects used instead of real ones for optical-digital recognition systems: experiment&lt;/title&gt;

Yezhov, Pavel V.; Kuzmenko, Alexander V.; Smirnova, T. V.; Ivanovskyy, Andriy A.

doi:10.1117/12.679944

Cited by 3 publications

(7 citation statements)

References 2 publications

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“…Although their scope is different then holographic displays, iterative algorithms for calculating synthesized-phase objects are interesting. They also published their experimental results in another paper [46]. Yet another paper from this group [47] describes the calculation of double-phase holograms (DPHs) by two different iterative methods.…”

Section: A An Overviewmentioning

confidence: 99%

State of the Art in Holographic Displays: A Survey

Yaraş

Kang

Onural

2010

J. Display Technol.

259

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True-3D imaging and display systems are based on physical duplication of light distribution. Holography is a true-3D technique. There are significant developments in electro-holographic displays in recent years. Liquid crystal, liquid crystal on silicon, optically addressed, mirror-based, holographic polymer-dispersed, and acousto-optic devices are used as holographic displays. There are complete electro-holographic display systems and some of them are already commercialized.

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Section: A An Overviewmentioning

confidence: 99%

State of the Art in Holographic Displays: A Survey

Yaraş

Kang

Onural

2010

J. Display Technol.

259

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“…1(2), ones. The recognition procedure [1] implies the following operations. 1) Record of the holographic matched filter for the standard object: i) input amplitude image of the standard object a st (x, y) into the correlator digital module ( Fig.…”

Section: Correlator Layoutmentioning

confidence: 99%

“…In [1], SP-object is defined as an object-dependent diffuser [11], the form of the function for which is determined by the form of the object function f(x,y) and calculated using the classical scheme of the iterative Fourier-transform (IFT) algorithm [12].…”

Section: Calculation Of Sp-objectsmentioning

confidence: 99%

“…Using the method offered in [1], we realized the matched filtering procedure and obtained δ-like recognition signals. Fig.…”

Section: Obtaining the Correlation Signalsmentioning

confidence: 99%

“…As shown in [1], when solving the recognition problem for binary or half-tone objects by using 4F-correlators, the replacement of these objects with unambiguously related to them synthesized-phase objects (SP-objects) results in increasing values of signal-to-noise (SNR) correlation signals as well as in unification of their form: the signal possesses a δ-like shape independently of the object type. The latter allows to formalize the pattern recognition problem at the stage of choosing some characteristic (distinctive) features of the object.…”

Section: Introductionmentioning

confidence: 99%

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http://journal-spqeo.org.ua/n2_2005/P070-074abstr.html

Yezhov¹

2008

Semicond. phys. quantum electron. optoelectron.

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The method of pattern recognition based on replacement of object images incoming to the correlator by object-dependent synthesized phase objects calculated using the iterative Fourier-transform algorithm was developed by us earlier. In this work, we performed experimental testing the above method by using an optical-digital 4Fcorrelator. Synthesized phase objects were inputed into the correlator through the spatial light modulator LC2002. Holographic matched filters were recorded using selfdeveloping photopolymers PPC-488. For two test objects, we obtained unified (δ-like) correlation signals with the signal-to-noise ratio reaching 24 dB, while the diffraction efficiency of these filters was up to 30%.

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Method of Synthesized Phase Objects in the Optical Pattern Recognition Problem

Yezhov¹,

Ostroukh²,

Kim³

et al. 2016

Pattern Recognition - Analysis and Applications

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To solve the pattern recognition problem, a method of synthesized phase objects (SPOmethod) is suggested. The essence of the suggested method is that synthesized phase objects are used instead of real amplitude objects. The former is object-dependent phase distributions calculated using the iterative Fourier transform algorithm. The method is experimentally studied with an optical-digital Vanderlugt and joint Fourier transform 4F-correlators. The development of the SPO-method for the rotation invariant pattern recognition is considered as well. We present the comparative analysis of recognition results with the use of the conventional and proposed methods, estimate the sensitivity of the latter to distortions of the structure of objects, and determine the applicability limits. It is demonstrated that the SPO-method allows one: (a) to simplify the procedure of choice of recognition signs (criteria); (b) to obtain one-type δ-like recognition signals irrespective of the type of objects; and (c) to improve the signal-to-noise ratio for correlation signals by 20-30 dB on the average. To introduce recognition objects in a correlator, we use SLM LC-R 2500 and SLM HEO 1080 Pluto devices.

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<title>Synthesized phase objects used instead of real ones for optical-digital recognition systems: experiment</title>

Cited by 3 publications

References 2 publications

State of the Art in Holographic Displays: A Survey

State of the Art in Holographic Displays: A Survey

http://journal-spqeo.org.ua/n2_2005/P070-074abstr.html

Method of Synthesized Phase Objects in the Optical Pattern Recognition Problem

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