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hybrid image and signal processing IV

作者： Jankowski, Mariusz Univ. of Southern Maine (United States)

ISBN: (纸本)0819415421

Background normalization is a low-level image processing task typically used to enhance images by eliminating featureless, nonuniform background illumination. Automatic background normalization requires three distinct steps: threshold selection and segmentation, reconstruction of background image, and subtraction. This paper presents a new region-based thresholding criterion for background identification and normalization. Experimental results will be presented.

关键词： image segmentation Binary data Error analysis image processing Luminescence Microscopy Data modeling image enhancement image processing algorithms and systems digital imaging

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Motion-compensated spatio-temporal interpolation for frame rate up-conversion of interlaced or progressive image sequences

Motion-compensated spatio-temporal interpolation for frame r...

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Visual Communications and image processing '94

作者： Chao, Teh-Tzong Huang, Chung-Lin Natl. Tsing Hua Univ. Hsinchu Taiwan

ISBN: (纸本)081941638X

This paper proposes a new motion-compensated frame (field) interpolation algorithm for frame (field) rate upconversion, which allows us to interpolate frame (or pairs of fields) between two originally continuous frames (fields) of a digital television sequence by preserving the stationary background. First, for a interlace format, the de-interlacing process was used to reduce the motion range after converting the interlace format to progressive one. A video scene can be temporally categorized by the change detector into changed and unchanged regions. Each changed region is further separated into moving objects, covered and uncovered regions. To interpolate the intermediate field (frame), we have developed direct motion interpolation method and indirect motion interpolation method to fill the moving object areas in the changed regions, and then apply the forward/backward motion extrapolation method to fill the covered/uncovered regions. Finally the hybrid repetition is used to interpolate the unchanged regions. In the experiment, we will show the interpolated fields and frames for two standard image sequences.

关键词： Television transmission

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NOISE-IMMUNITY OF THRESHOLD DECOMPOSITION optoelectronic ORDER-STATISTIC FILTERING

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OPTICS LETTERS 1993年第16期18卷 1349-1351页

作者： TASTO, JL RHODES, WT GEORGIA INST TECHNOL CTR OPT SCI & ENGNATLANTAGA 30332

High-speed analog optoelectronic image processing systems are generally characterized by low accuracy and are not well suited to applications requiring large dynamic range. We show that the low accuracy of a typical analog optoelectronic convolver can be tolerated in a high-accuracy application when threshold decomposition is used to perform order-statistic processing on digitized gray-scale imagery. The robustness of the method in the presence of system noise, combined with the parallelism of the optical convolver, suggests that hybrid analog optical/digital electronic processors for order-statistic image processing may be attractive alternatives to all-electronic processors. We analyze the immunity of such a hybrid processor to noise generated by spatial variations of emitter and photodetector arrays for the order-statistic operations of median filtering, dilation, and erosion.

关键词： Detector arrays Diode lasers image processing Nonlinear spatial filtering Photodetectors Surface emitting lasers

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optoelectronic image-PROCESSORS

OPTOELECTRONIC IMAGE-PROCESSORS

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4TH ANNUAL CONF ON optical PATTERN RECOGNITION

作者： GIBIN, IS Siberian Optical Systems Research Institute (Russia)

ISBN: (纸本)0819411957

Some hybrid (analogue—digital) optoelectronic image processing system are considerecL optical correlation processors with the pro— grammable trans-Formation core forming are proposed. optical processor operation in the matrix—vector multiplication mode is discussed. A comparision analysis of optical image processors and digital universal and matrix calculators is carried outS.

关键词： image processing digital image processing optoelectronics Computing systems image analysis optical pattern recognition digital image correlation image filtering Modulators Detection and tracking algorithms

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DESIGN OF AN IRI TRACK SYSTEM

DESIGN OF AN IRI TRACK SYSTEM

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INTERNATIONAL SYMP ON PHOTOELECTRONIC DETECTION AND IMAGING : TECHNOLOGY AND APPLICATIONS ( ISPDI 93 ) ( PREPRINTS )

作者： TAO, L LuoYang Optoelectronic Development Ctr. (China)

ISBN: (纸本)0819412295

This paper presents the algorithm of an IR image track system, its hardware and software design. TMS32020 (or C25), as the main tools of image processing, makes the IRI track experiment system closed-loop. Track algorithm and processing speed are tested in the dynamic tracking situation. The experiment results show that the system can track the target in real-time, the period from collecting data to the output of the track control signal is less than 8.5 ms, and with a good ability to resist noise and disturbance.

关键词： digital signal processing Detection and tracking algorithms Control systems IRIS Consortium signal to noise ratio Analog electronics image processing signal processing Interference (communication) Target detection

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NONLINEAR MORPHOLOGICAL PROCESSORS FOR POINT-TARGET DETECTION VERSUS AN ADAPTIVE LINEAR SPATIAL FILTER - A PERFORMANCE COMPARISON

NONLINEAR MORPHOLOGICAL PROCESSORS FOR POINT-TARGET DETECTIO...

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5TH CONF ON signal AND DATA processing OF SMALL TARGETS

作者： BARNETT, JT BILLARD, BD LEE, C Space & Naval Warfare Systems Command SYSCEN (United States) Naval Surface Warfare Ctr. (United States)

ISBN: (纸本)0819411906

This paper presents a comparative performance evaluation of three signal processing architectures for the point-target detection problem in infrared surveillance systems. The comparison involves an adaptive linear spatial filter of the least-mean-square (LMS) type, with a median subtraction filter, and a morphological based processor. The median and morphological filters are nonlinear operators that are based on the order-statistics of the input samples. The three architectures are exercised, via computer simulation, against real deterministic data sets comprising a range of horizon backgrounds. Receiver operating characteristic (ROC) curves are presented and provide a quantitative measure for the performance comparison. Some advantages and disadvantages of each filter type are indicated, with recommendations for a hybrid architecture which incorporates the different filtering schemes.

关键词： Filtering (signal processing) digital filtering Nonlinear filtering Linear filtering signal processing Spatial filters image filtering optical filters Sensors Infrared search and track

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optical Information processing systems and Architectures IV

Optical Information Processing Systems and Architectures IV

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optical Information processing systems and Architectures IV 1992

The proceedings contain 38 papers. The topics discussed include: multiclass optical correlation filters for alphanumeric field recognition;synthetic discriminant functions for implementation on arbitrarily constrained devices;dynamically reconfigurable optical morphological processor and its applications;real-valued composite filters for optical pattern recognition;computer sumulations of the nonlinear joint transform correlator performance for disjoint signal and scene noise;effects of nonlinear parameters in feedback joint transform correlator (I);optoelectronic neural network utilizing a joint transform correlator;application of a hybrid digital-optical cross-correlator as a semi-autonomous vision system;and fabrication of a character recognition system by a multiplexed matched spatial filter by feature-extracted patterns.

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optoelectronic system of digital holographic image processing

Optoelectronic system of digital holographic image processin...

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Int. Conference on Holography, Correlation Optics, and Recording Materials

作者： Chumakov, Alexandr G. Kisil, Alexandr V. Kovalenko, Andrey V. Kurashov, Vitalij N. Nakhodkin, N.G. Podanchuk, Dmitrij V.

In this research we have generalized the experience of the optical data processing laboratory on investigation, elaboration, and design of the multifunctional hybrid optical-electronic systems, which may be used for a...

ISBN: (纸本)0819413992

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A new real-time ultrasonic imaging system

A new real-time ultrasonic imaging system

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International Conference on Acoustic Sensing and Imaging, 1993.

作者： G.P.P. Gunarathne Robert Gordon University UK

Present day imaging systems exhibit many problems, such as, low temporal and lateral resolution, operator dependence, high cost and complexity etc. The new system described is an attempt to address these problems by combining the desirable features of a range of techniques including digitally controlled phased-array scanning, wide-band analog processing in multiple channels and acousto-optical image reconstruction with on-line image enhancement techniques. The resulting hybrid system is capable of operating in B-scan, sector scan and focused scan modes in pseudo real-time. Furthermore, this hybrid system is compact and portable and exhibits potential advantages in real-time non-destructive-testing and medical applications.< >

关键词： Acoustic imaging Acoustic signal processing digital control image processing Real time systems Acoustic applications

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optoelectronic WIDE-WORD PERSONALITY ROMS FOR HIGH-SPEED CONTROL APPLICATIONS

OPTOELECTRONIC WIDE-WORD PERSONALITY ROMS FOR HIGH-SPEED CON...

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3RD CONF ON hybrid image AND signal processing

作者： ARRATHOON, R ARSHAD, J LI, T LIN, TW ZHANG, B Wayne State Univ. (United States)

ISBN: (纸本)0819408670

A fiber optic based wide-word personality ROM capable of data rates in excess of 125 Mbs has been constructed and tested. Because of the special fan-out characteristics of optical devices, the optoelectronic ROM is capable of operating in a wide-word regime that is inaccessible to all-electronic ROMs. The principle of operation permits n electrical control bits to select among 2ⁿ groups of p optical output bits. In theory, each output word of width p can consist of thousands of bits. The device constitutes a high-speed electro-optic control system permitting a small number of electrical bits to control a geometrically larger number of optical output bits.

关键词： optoelectronics Fiber optics Control systems image processing signal processing Fluctuations and noise Logic System on a chip Logic devices Switching

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