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Experimental comparison of optical binary phase-only filter and high-pass matched filter correlation

Experimental comparison of optical binary phase-only filter ...

引用

signal and image processing systems performance evaluation, simulation, and modeling

作者： Leib, Kenneth G. Brandstetter, Robert W. Drake, Marvin D. Franks, Glen B. Siewert, Ronald O. Grumman Aerospace Corp. Wantagh NY USA

ISBN: (纸本)0819405922

An experimental comparison of two optical correlation systems in their ability to do target detection, identification, and discrimination is described. A common set of four binary input images was used for the experiments, which included single and multiple target scenes. The set included symmetric and asymmetric objects. The two optical correlation systems compared were (a) a high pass matched filter (HPMF) VanderLugt system and (b) a binary phase-only filter (BPOF) system. In the HPMF system, the input image and filter are film- based, with the filter somewhat Gaussian apodized to achieve high passing. The BPOF system has one magneto-optical spatial light modulator as the input device, and another as the filter device. The experimental measurements compared were (1) target auto- and crosscorrelation, (2) auto- and crosscorrelation for multiple target scenes, (3) spatial extent of the correlation peaks, and (4) sidelobe levels in multiple target scenes. In spite of the fundamental differences in the correlators compared (i.e., film vs. real time image/filter), the use of binary imagery and high pass filters in both cases gave comparable results in target detection, identification, and discrimination. Both the similarities and the differences are described and summarized.

关键词： image processing

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End-to-end model for detection performance evaluation against scenario-specific targets

End-to-end model for detection performance evaluation agains...

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Infrared Imaging systems: Design, Analysis, modeling and Testing II

作者： Iannarilli Jr., Frank J. Wohlers, Martin R. Aerodyne Research Inc. Billerica MA USA

ISBN: (纸本)0819405973

Aerodyne has recently developed an IRST engagement model under contract for Lockheed Aeronautical systems Company. The model's purpose is to simulate the performance of an IRST system in long-range air-to-air detection and tracking engagements. The hallmark of the model is its end-to-end first-principles modeling of all major elements which determine specific performance. The target aircraft IR signature, and atmospheric cloud and sky background, and associated atmospheric effects are modeled at high fidelity, thereby producing an input image matched to the specific IRST under study. A detailed deterministic model of the IRST accounts for optical and sensor effects, signal processing, and track association typical of first-generation IRSTs. These model elements are coupled together along with a dynamic target and observer [IRST] trajectories model so that an analyst can specify air-to-air engagements at various velocities, ranges, and viewing angles. The analyst can study the effects of varying IRST algorithms, sensor characteristics, optical bandpass, cloud background levels, atmospheric effects, and target performance characteristics as well as varying the target aircraft itself. This computer model was designed for portability and growth.

关键词： image Sensors

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Technique for ground/image truthing using a digital map to reduce the number of required measurements

Technique for ground/image truthing using a digital map to r...

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signal and image processing systems performance evaluation, simulation, and modeling

作者： Der, Sandor Z. Dome, G.J. Rusche, Gerald A. U.S. Army Cent. for Night Vision and Electro-Optics Fort Belvoir VA USA

ISBN: (纸本)0819405922

The U.S. Army CECOM Center for Night Vision and Electro-Optics (C2NVEO) maintains a terrain board for the purpose of testing and evaluating Automatic Target Recognizers (ATRs). A combination ground truth and image truth procedure has been devised which minimizes the number of location measurements made, thus reducing set-up time. Reference points are ground truthed using lasers mounted on optical benches on the north and east edges of the terrain board. The program uses the measured ground and image location of two targets (reference points), combined with a digital map of the region in question, to calculate the camera azimuth, elevation, and roll angles. Thereafter the program calculates the ground location of any target given the image location using a simple ray trace procedure. Since the ground truthing of a target is much more time intensive than the image truthing, a great deal of time is saved if there are more than two targets. An elegant user interface allows the operator to display the current image, mark the image location of each target with a mouse, and have the program display the ranges to each target. This procedure has dramatically reduced the personnel required to conduct a test. The ray tracing procedure can also be applied to field testing with some modifications. In order to increase the maximum range at which targets can be viewed within the confines of the terrain room, a mirror has recently been added. The ground truthing procedure for the mirror is discussed.

关键词： image processing

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performance evaluation of a demand assignment multiple access scheme for mobile radio dispatch over satellite

Performance evaluation of a demand assignment multiple acces...

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IEEE Pacific Rim Conference on Communications, Computers and signal processing

作者： C.J. Powell V.C.M. Leung Department of Electrical Engineering University of British Columbia Vancouver BC Canada

The authors present the performance evaluation of a demand assignment multiple access (DAMA) scheme designed specifically for the mobile radio service (MRS) to be supported by the emerging mobile satellite systems (MSSs). MRS caters mainly to private voice dispatch applications, where traffic is characterized by short holding time and fixed connectivity. The DAMA scheme makes use of call queuing, batch processing, and pipelined signaling to minimize call setup overhead for MRS traffic. Batching delay and channel assignment delay are investigated by simulation modeling of many private dispatch networks operating over a multiple spot beam satellite. Traffic engineering issues are considered. A dynamic channel allocation scheme is devised to increase system capacity by sharing the DAMA channel pool between MRS and the mobile telephone service (MTS).< >

关键词： Land mobile radio Protocols Satellite broadcasting Delay Telecommunication traffic Traffic control Telephony Satellite ground stations Channel allocation Control systems

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signal and image processing systems performance evaluation

Signal and Image Processing Systems Performance Evaluation

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signal and image processing systems performance evaluation

This conference proceedings contains 22 papers. The papers are arranged in the following sessions: performance evaluation;data collection and characterization;modeling and simulation;and novel concepts. Many of the pa... 详细信息

ISBN: (纸本)081940361X

关键词： image processing

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EXPERIMENTAL-DESIGN METHODOLOGY - THE SCIENTIFIC TOOL FOR performance evaluation

EXPERIMENTAL-DESIGN METHODOLOGY - THE SCIENTIFIC TOOL FOR PE...

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CONF ON signal and image processing systems performance evaluation

作者： SADJADI, F Honeywell Systems and Research Ctr. (United States)

ISBN: (纸本)081940361X

With the rapid growth of the signal and image processing technology in the last several decades has arisen the need for means of evaluating and comparing the numerous algorithms and systems that are created or are being developed. performance evaluation, in the past, has been mostly ad hoc and incohesive. In this paper we present a systematic step by step approach for the scientific evaluation of signal and image processing algorithms and systems. This approach is based on the methodology of Experimental Design. We illustrate this method by means of an example from the field of automatic object recognition.

关键词： image processing Data modeling signal processing performance modeling Algorithm development Error analysis systems modeling Detection and tracking algorithms Infrared imaging Sensors

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ANALYTICAL modeling FOR AUTOMATIC TARGET RECOGNITION performance evaluation

ANALYTICAL MODELING FOR AUTOMATIC TARGET RECOGNITION PERFORM...

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CONF ON signal and image processing systems performance evaluation

作者： OH, Y COOK, M Texas Instruments Inc. (United States)

ISBN: (纸本)081940361X

There are two demanding needs which must be fulfilled to further the development of automatic target recognition systems. One is analytical modeling for performance prediction and the other is a disciplined evaluation methodology for automatic target recognition algorithms. Currently both areas are in their infancy. The analytical modeling for automatic target recognition performance evaluation and for prediction of algorithm performances has been investigated, both as they relate to human visual performances and as a tool for algorithm development. The matched filter approach presented a good limiting performance for target detection in uncluttered scenes with complete knowledge- of the target characteristics. The comparision of the matched filter detection performance to human performance model have produced some interesting results.

关键词： performance modeling signal to noise ratio Sensors Target detection Automatic target recognition systems modeling Electro optical modeling signal attenuation signal detection signal processing

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UNIFIED TARGET modeling, VALIDATION, AND ATR performance evaluation

UNIFIED TARGET MODELING, VALIDATION, AND ATR PERFORMANCE EVA...

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CONF ON signal and image processing systems performance evaluation

作者： DUNCAN, D Honeywell Systems and Research Ctr. (United States)

ISBN: (纸本)081940361X

I propose to incorporate two new kinds of groundtruth and an infrared (IR) target model in a causal automatic target recognizer (ATh) performance evaluation scheme. In principle, this scheme allows for the detailed causal analysis of segmentor performance and avoids the misleading and uninformative aspects of current statistical segmentor performance evaluation techniques. The scheme also allows for the validation and partial construction of IR target models.

关键词： performance modeling 3D modeling Automatic target recognition image segmentation systems modeling Infrared imaging Sensors Coating Visible radiation image sensors

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OBJECT REPRESENTATION WITH A SINGLE CONTINUOUS FORMULA

OBJECT REPRESENTATION WITH A SINGLE CONTINUOUS FORMULA

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CONF ON signal and image processing systems performance evaluation

作者： DUNCAN, D Honeywell Systems and Research Ctr. (United States)

ISBN: (纸本)081940361X

The possibility of representing the two-dimensional (2D) orthogonal image of an arbitrary 3D object from any viewpoint and orientation is established. The novelty of the representation is that it consists of a single continuous analytic formula. This allows for the complete symbolic representation of an object and derivative features, and may aid in object recognition and the establishment of object recognition standards.

关键词： Fourier transforms 3D image processing Target recognition Transform theory image processing Object recognition signal processing Atmospheric modeling Prototyping Infrared imaging

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performance-MEASUREMENTS OF REAL-TIME FEATURE-EXTRACTION MODULES

PERFORMANCE-MEASUREMENTS OF REAL-TIME FEATURE-EXTRACTION MOD...

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CONF ON signal and image processing systems performance evaluation

作者： ROBERTS, G BRADFORD, L GUTFINGER, D SCHERF, A Ford Aerospace (United States)

ISBN: (纸本)081940361X

performance measurements of several feature extraction modules used in an automatic target cuer and automatic target recognizer are described. The performance of these modules and the methods used to obtain the performance are shown. These performance measurements were obtained by observing the reaL-time system during analysis of video FLIR data. Parameter optimization methods are also outlined and the results obtained in the optimization process are described.

关键词： signal processing image processing Automatic target recognition Video 3D modeling Target recognition Forward looking infrared Feature extraction Roads Target detection

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