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optoelectronic and hybrid optical/digital systems for image and signal processing

作者： Herrigel, A. Voloshynovskiy, S. Hrytskiv, Z. Digital Copyright Technologies Zurich Switzerland

This paper presents a new approach for the secure integrity verification of driver licenses, passports or other analogue identification documents. The system embeds (detects) the reference number of the identification document with the DCT watermark technology in (from) the owner photo of the identification document holder. During verification the reference number is extracted and compared with the reference number printed in the identification document. The approach combines optical and digital image processing techniques. The detection system must be able to scan an analogue driver license or passport, convert the image of this document into a digital representation and then apply the watermark verification algorithm to check the payload of the embedded watermark. If the payload of the watermark is identical with the printed visual reference number of the issuer, the verification was successful and the passport or driver license has not been modified. This approach constitutes a new class of application for the watermark technology, which was originally targeted for the copyright protection of digital multimedia data. The presented approach substantially increases the security of the analogue identification documents applied in many European countries.

关键词： optical image storage

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Optimization of signal accumulation time during photometric measuring

Optimization of signal accumulation time during photometric ...

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optoelectronic and hybrid optical/digital systems for image and signal processing

作者： Klym, B.P. Pochapskyi, Ye.P. Natl Acad of Sciences of Ukraine Ukraine

The algorithm of estimation of the light signal parameters with a preset relative mean-square error under conditions of instability of the sounding radiation source and the presence of pronounced interference background of the optical transmission channel that provide the optimal time of signal storage have been synthesized. Algorithms for the estimation of photometric value with a preset relative mean-square error under the conditions of instability of the sounding radiation source and the presence of the pronounced interference background of the optical transmission channel were determined using the Poisson's statistics of outcome pulse of photoelectric detector. The algorithms provide the optimum signal storage time.

关键词： Photodetectors

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Method for image coordinate definition on extended laser paths

Method for image coordinate definition on extended laser pat...

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optoelectronic and hybrid optical/digital systems for image and signal processing

作者： Timchenko, Leonid I. Kutaev, Yuri F. Gertsiy, Alexander A. Halchenko, Yaroslav O. Zahoruiko, Lubov V. Mansur, Tamer Vinnitsa State Technical Univ Ukraine

Both the methodology and results of experimental research performed for the laser path images normalization by means of compact models description that describe image classes are considered in this paper. The problems of preliminary image processing based on the method of generalized Q-transformation are being solved. The image segmentation with the formation of connectivity matrices and the formal description of the resulting components are taken into consideration as well. The calculating algorithms based on the methodology of dichotomous balance of the images with the analysis of the shape and definition of coordinates being prepared have been used for the classification of laser path images. The research paper submitted consists of two parts. The first part deals with the change of images of a laser path, the second one deals with their coordinate definition.

关键词： optoelectronic devices

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optoelectronic interconnections for high throughput networks and pipeline signal processing

Optoelectronic interconnections for high throughput networks...

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2000 IEEE/LEOS Summer Topical Meeting

作者： Sawchuk, Alexander A. Kuznia, Charles B. Univ of Southern California Los Angeles United States

The concept and experimental implementation of a smart pixel (SP) system for networking and image/video processing based on digital optoelectronic (DO) technology are discussed. Focus is on the features unique to SP systems: networking with 2-D spatial parallel channels and 2-D parallel pipeline image and video processing for applications such as compression and tracking.

关键词： optical interconnects

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Adaptive imaging system using image quality metric based on statistical analysis of speckle fields

Adaptive imaging system using image quality metric based on ...

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hybrid image and signal processing VII

作者： Kim, Dai Hyun Kolesnikov, Kirill Kostrzewski, Andrew Savant, Gajendra Vasiliev, Anatoly A. Vorontsov, Mikhail A. Physical Optics Corp Torrance United States

This paper describes an Opto-Silicon Adaptive Imaging (OSAI) system capable of operating at low light intensities with high resolution, high accuracy, wide dynamic range, and high speed. The system consists of three major subsystems: (a) an adaptive imaging system in which a liquid crystal wavefront corrector measures image quality based on statistical analysis of a speckle field;(b) a image quality analyzer (IQA);(c) an opto-silicon multi-chip module (MCM) combining a high-resolution ferroelectric liquid crystal (FLC) SLM, CCD photodetector array, field-programmable gate array (FPGA), and digital signal processor (DSP). The OSAI wavefront control applies adaptive optoelectronic feedback for iterative wavefront restoration and distortion compensation, using an image quality metric based on statistical properties of the speckle field produced by moving a diffuser in the Fourier transform plane of an IQA optical system. A prototype IQA system was designed, manufactured, and tested using an input liquid crystal SLM, a Fourier lens, a light-shaping diffuser, and an output photodiode.

关键词： Imaging systems

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Coding of images by methods of a spline interpolation

Coding of images by methods of a spline interpolation

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optoelectronic and hybrid optical/digital systems for image and signal processing

作者： Kozhemiako, V.P. Maidanuik, V.P. Etokov, I.A. Zhukov, K.M. Jorban, Saleh R. Vinnitsa Technical Univ Vinnitsa Ukraine

In the case of image coding are containing interpolation methods, a linear methods of component forming usually used. However, taking in account the huge speed increasing of a computer and hardware integration power, of special interest was more complicated interpolation methods, in particular spline interpolation. A spline interpolation is known to be a approximation that performed by spline, which consist of polynomial bounds, where a cub parabola usually used. At this article is to perform image analysis by 5×5 aperture, result in count rejection of low-frequence component of image: an one base count per 5×5 size fragment. The passed source counts were restoring by spline interpolation methods, then formed counts of high-frequence image component, by subtract from counts of initial image a low-frequence component and their quantization. At the final stage Huffman coding performed to divert of statistical redundancy. Spacious set of experiments with various images showed that source compression factor may be founded into limits of 10-70, which for majority test images are superlative source compression factor by JPEG standard applications at the same image quality. Investigated research show that spline approximation allow to improve restored image quality and compression factor to compare with linear interpolation. Encoding program modules has work out for BMP-format files, on the Windows and MS-DOS platforms.

关键词： image coding

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optoelectronic interconnections for high throughput networks and pipeline signal processing

Optoelectronic interconnections for high throughput networks...

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LEOS Summer Topical Meetings

作者： A.A. Sawchuk C.B. Kuznia Signal and Image Processing Institute University of Southern California Los Angeles CA USA

We describe the concept and experimental implementation of a smart pixel (SP) system for networking and image/video processing based on digital optoelectronic (DO) technology. DO technology enables 2D optical data transfer to and from VLSI chips at throughputs of >1 Tb/s, with very low latency (<10 ns) and very high speed (>500 Mb/s) on each of many (>100) parallel data channels. This system concept is called Transpar-TR (Translucent Smart Pixel Array-Token-Ring). The Transpar-TR is configured as a photonic ring network that transfers digital data using three-dimensional optical parallel data packets (OPDPs). Similar to most packet based networking schemes on serial interconnect links, the OPDPs contain data payload and source/destination node address information. The data pipe between nodes consists of a 2D array of optical links each operating at on-chip clock rates. This data pipe between nodes is designed to accommodate the sum of all other smaller data pipes entering the network from individual nodes, thus this system is an example of a firehose architecture. Our goal is to demonstrate two features unique to SP systems: networking with 2D spatial parallel channels and 2D parallel pipeline image and video processing for applications such as compression and tracking.

关键词： Throughput Smart pixels High speed optical techniques optical interconnections optical arrays Very large scale integration Delay optical fiber networks Payloads optical fiber communication

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optical Fourier processor and point-diffraction interferometer for moving-object trajectory estimation

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APPLIED OPTICS 1999年第20期38卷 4306-4315页

作者： Lane, PM Cada, M Dalhousie Univ DalTech Dept Elect & Comp Engn Halifax NS B3J 2X4 Canada

A hybrid optical-digital signal processing system that estimates the trajectory of moving targets in a two-dimensional field at video frame rates was developed and constructed. The hybrid system is particularly well suited to the trajectory estimation of small, barely discernable, moving objects of unknown position and velocity in high-resolution image sequences. The system uses an optical Fourier processor and a point-diffraction interferometer to calculate the frequency-domain representation of moving objects from which their trajectory is estimated by use of conventional electronic processing techniques. In a series of experiments, target velocities were estimated to within 4% of their actual value and direction was estimated to within 3 deg. (C) 1999 optical Society of America. OCIS codes: 070.0070, 150.0150, 100.1160.

关键词： interferometers signal processing Worksystem Moving PROCESSOR Fourier hybrid systems optical electronic processing trajectory

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Application of digital signal processors in optoelectronic systems

Application of digital signal processors in optoelectronic s...

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Proceedings of the 1999 3rd International Conference on optical Information processing

作者： Esepkina, N.A. Kruglov, S.K. Molodyakov, S.A. Sotnikova, G.Yu. St. Petersburg State Technical Univ St. Petersburg Russia

The structure and operating principle of an hybrid optoelectronic system is presented. The basic part of the system is digital signal processor. DSP executes functions: control, synchronization, data processing. The construction two systems with DSP: AO radiospectrometer and AO dispersion compensator of radiosignals from pulsars are discussed.

关键词： Microprocessor chips

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Two-dimensional parallel pipeline smart pixel array cellular logic (SPARCL) processors - Chip design and system implementation

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IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 1999年第2期5卷 376-386页

作者： Kunzia, CB Wu, JM Chen, CH Hoanca, B Cheng, L Weber, AG Sawchuk, AA Univ So Calif Inst Signal & Image Proc Los Angeles CA 90089 USA

We describe the chip design and system implementation of an optoelectronic parallel pipeline processing system composed of cascaded stages of smart pixel array cellular logic (SPARCL) processors interconnected with free-space digital optic channels. The SPARCL processing elements are arranged in a two-dimensional array, and each contains an independent optical input/output port and electrical nearest-neighbor local interconnections. The smart pixels are implemented using GaAs-GaAlAs multiple quantum-well diode arrays flip-chip bonded onto complementary metal-oxide-semiconductor circuitry through the Bell Labs Lucent Technologies/George Mason University optoelectronic VLSI foundry, This system provides efficient execution of single-instruction multiple-data algorithms on large data fields and images.

关键词： cellular logic arrays CMOS integrated circuits integrated optoelectronics optical interconnections smart pixels

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