Joint transform correlator

Author: dxpl

August undefined, 2024

NettetWe introduce for the first time, to the best of our knowledge, a three-dimensional experimental joint transform correlator (JTC) cryptosystem allowing the encryption of information for any 3D object, and as an additional novel feature, a second 3D object plays the role of the encoding key. While the JTC architecture is normally used to process 2D …

Optical Image Encryption Using a Nonlinear Joint Transform …

Nettet1. aug. 2000 · An optical double random-phase encryption method using a joint transform correlator architecture is proposed. In this method, the joint power spectrum of the … Nettet15. feb. 2006 · Optical encryption using joint transform correlator architecture The optical encryption system based on joint transform correlator architecture [3] is shown in Fig. 1 , in which the symbols a ( x , y ) and p ( x , y ) denote the input image to be encrypted and the random phase diffuser, respectively. seibasou

Comparison of vander lugt and joint transform correlators

NettetRecently, a nonlinear image correlator was introduced1 that was based on joint transform architecture.2 This nonlinear joint transform processor uses nonlinearity at the Fourier plane by thresholding the joint power spectrum. It has been shown that the nonlinear joint transform correlator can provide a higher autocorrelation peak … Nettet18. nov. 2013 · A ciphertext-only attack (COA) on a joint transform correlator (JTC) encryption system is proposed. From the perspective view of optical cryptanalysis, we find out that the issue to be solved in the COA scheme could be transferred into a phase retrieval problem with single intensity measurement. And … NettetA novel nonlinear encryption–decryption system based on a joint transform correlator (JTC) and the Gyrator transform (GT) for the simultaneous encryption and decryption of multiple images in grayscale is proposed. This security system features a high level of security for the single real-valued encrypted image and a high image quality for the … seibel club itc

Optical Image Encryption Using a Nonlinear Joint Transform …

The joint transform correlator (Weaver and Goodman 1966 )

NettetIn summary, a major limitation on the optical joint transform correlator (JTC) is that the output plane is dominated by unwanted self correlation products. The present … Nettet7. nov. 2024 · In this work, we present a new nonlinear joint transform correlator (JTC) architecture in the Fourier domain (FD) for the encryption and decryption of two … seibel clogs herrenNettetLeo P. Schirber is an academic researcher from Rockwell International. The author has contributed to research in topic(s): Distortion & Optical engineering. The author has an hindex of 1, co-authored 1 publication(s) receiving 4 citation(s). seibel compass training

"Nettet2.《Hybrid optoelectronic joint transform correlator for the recognition of moving target in cluttered》，ISTM，2007。 3.《Application or joint transform correlator in detection ofinfrared target》，SPIE，2007。 " - Joint transform correlator

Joint transform correlator

Netteteither the use of a matched-ﬁlter-based correlator3 or a joint transform correlator4 (JTC). A matched-ﬁlter-based correlator uses Fourier domain complex ﬁlter … Nettet1. mar. 2015 · The size of MFR, MFT and the high-pass filter is 256 × 256 pixels. The images in polar space are also 256 × 256 pixels. For a rotation ranging from 0° to 360°, its transformed result ranges from 0 to 256 along θ axis. So the real rotation angle θ is obtained through (8) θ = Δ θ × 360 256 where Δ θ is the translation measured by JTC ...

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Nettet3. jul. 2009 · Abstract. A joint transform correlator, performing pure phase correlation by a phase spatial light modulator in the input to the second stage optical setup, is … Nettet10. nov. 1998 · The three-dimensional (3-D) joint transform correlator is demonstrated with realistic targets. Three-dimensional objects observed by multiple cameras are …

Nettet1. feb. 2024 · A preferred implementation of the optical DRPE is the joint transform correlator (JTC) architecture [9], because this JTC permits to alleviate the strict setup alignment requirement of the holographic system (4f-processor [10]) used to experimentally carry out the DRPE [3]; moreover, the encrypted image obtained in the … NettetA rotation and scale-invariant optical correlator has been developed, assembled, and evaluated for use as a multiple target recognition system. The system consists of an optical correlator with magneto-optic spatial light modulators (MOSLMs) at the input and filter planes and a vidicon at the correlation plane. A COMPAQ 386 (IBM compatible) …

NettetA 2D correlation of images is one of very efficient methods used in both identification and classification area of image processing. Numerical evaluation of 2D is computationally highly demanding and therefore the optical methods are interested because of parallel and fast performance. The JTC (Joint Fourier Transform) is a well known optical technique … Nettet1. nov. 2013 · A new optical security system for image encryption based on a nonlinear joint transform correlator (JTC) and Fresnel transform is proposed. A lensless optical encryption system, which is a ...

Nettet18. nov. 2013 · A ciphertext-only attack (COA) on a joint transform correlator (JTC) encryption system is proposed. From the perspective view of optical cryptanalysis, we …

NettetAdaptive binary joint transform correlator for image recognition - NASA/ADS. Our research has shown that the autocorrelation peaks of a binary joint transform … seibel naly 09 bodeauxNettetA. Joint Transform Correlator Approach The well-known 4-f processor3 is implemented by means of two lenses having the same focal length (f) separated by a distance of 2f and with, on the Fourier plane, a transparency containing the Fourier trans-formofthereferencepattern.Byprojectinglightonto an object positioned on the front focal … seibel chopper for eyesNettet12. J. Wang and B. Javidi, ‘‘Multiobject Detection Using the Binary One disadvantage of the backfire bifilar helix antenna is Joint Transform Correlator with Different Types of … seibel drive cuyahoga falls ohio