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检索条件"主题词=Algorithm development"

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Encoding Scene Structures for Video Compression

Encoding Scene Structures for Video Compression

引用

Conference on Applications of Digital Image Processing XXXV

作者： Georgiadis, Georgios Ravichandran, Avinash Soatto, Stefano Chiuso, Alessandro Univ Calif Los Angeles UCLA Vis Lab Los Angeles CA 90095 USA Univ Padua Dept Informat Engn I-35131 Padua Italy

ISBN: (纸本)9780819492166

We describe an approach to partition a video stream into structure regions that are temporally encoded and disjoint from texture regions, that are synthesized so as to preserve the statistical properties of the original data stream. Structures encode regions of an image that can be put into correspondence in different images of the same scene, and are encoded via a dictionary that takes into account spatial and temporal regularities. Textures are synthesized in a manner that preserves perceptual similarity.

关键词： Image segmentation Video compression Associative arrays Sensors Computer programming Video Image compression algorithm development Image processing Image processing algorithms and systems

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PROCESS LATITUDES IN PROJECTION PRINTING

PROCESS LATITUDES IN PROJECTION PRINTING

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CONF ON ELECTRON-BEAM, X-RAY AND ION-BEAM SUBMICROMETER LITHOGRAPHIES FOR MANUFACTURING

作者： BAROUCH, E HOLLERBACH, U ORSZAG, SA BRADIE, B PECKERAR, M Princeton Univ. (United States) Naval Research Lab. (United States)

ISBN: (纸本)0819405647

A simulation package has been developed to address a wide variety of process latitude issues. The authors demonstrate its versatility by studying three examples: (i) process latitude degradation due to notching, (ii) line width dependence of a newly developed negative I-line chemically amplified resist on baking time, and (iii) linewidth control of an exposed x-ray 0.5 (mu) line as a function of baking time. A powerful all-purpose 3-D dissolution algorithm has been developed for this purpose. It is the only dissolution algorithm capable of handling changes to topology of the dissolution surface.

关键词： algorithm development X-rays Lithography Manufacturing Photomasks Printing X-ray lithography Molecules Chemically amplified resists Photoresist processing

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Source adaptive blind source separation: Gaussian models and sparsity

Source adaptive blind source separation: Gaussian models and...

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Wavelets - Applications in Signal and Image Processing X Conference

作者： Pham, DT Cardoso, JF Lab Modelisat & Calcul F-38041 Grenoble 9 France

ISBN: (纸本)0819450804

Using the time-frequency (or -scale) diversity of the source processes allows the blind source separation problem to be tackled within Gaussian models. In this work, we show that this approach amounts to minimizing a certain sparseness criterion for the energy distribution of the source over the time-frequency (or -scale) plane. We also explore the link between independence and sparsity and shows that other sparsity criteria (some examples of which are provided) can be used. Further, we introduce an adaptive method which tries to find the best sparse representation of the. source energy in order to exploit the sparsity in a most efficient way. An algorithm, adapted from that of Coifman and Wickerhauser has been developed for this end. Finally a simulation example has been given.

关键词： Chemical species Time-frequency analysis algorithm development Error analysis Matrices Statistical analysis Signal processing Statistical modeling Stochastic processes Wavelets

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MACHINE VISION PLATFORM REQUIREMENTS FOR SUCCESSFUL IMPLEMENTATION AND SUPPORT IN THE SEMICONDUCTOR ASSEMBLY MANUFACTURING ENVIRONMENT

MACHINE VISION PLATFORM REQUIREMENTS FOR SUCCESSFUL IMPLEMEN...

引用

CONF ON MACHINE VISION SYSTEMS INTEGRATION IN INDUSTRY

作者： LEBEAU, CJ Motorola Inc. (United States)

ISBN: (纸本)0819404535

In todays Semiconductor Manufacturing Industry it is becoming more difficult to utilize the human operator as the visual process control vehicle so as to cost-effectively achieve statistical process defect goals. Machine vision continues to make inroads cost-effectively improving manufacturing visual inspection requirements driving and sustaining desired process control capabilities. This paper will attempt to survey the attributes of automatic visual process monitoring within the Motorola Semiconductor Assembly Manufacturing environment. Such factors as defect control objectives inspection requirements vision engine platform application engineering and long-term application maintenance all of which contribute to the costeffectiveness of the automatic visual inspection task.

关键词： Inspection Machine vision Manufacturing Image processing Process control Software development algorithm development Optical inspection Semiconductor manufacturing Semiconductors

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FAST copper for broadband access

FAST copper for broadband access

引用

Conference on Broadband Access Communication Technologies

作者： Chiang, Mung Huang, Jianwei Cendrillon, Raphael Tan, Chee Wei Xu, Dahai Princeton Univ Dept Elect Engn Princeton NJ 08544 USA Marvell Semiconduct Hamilton NY USA

ISBN: (纸本)0819464880

FAST Copper is a multi-year, U.S. NSF funded project that started in 2004, and is jointly pursued by the research groups of Mung Chiang at Princeton University, John Cioffi at Stanford University, and Alexader Fraser at Fraser Research Lab, and in collaboration with several industrial partners including AT&T. The goal of the FAST Copper Project is to provide ubiquitous, 100 Mbps, fiber/DSL broadband access to everyone in the U.S. with a phone line. This goal will be achieved through two threads of research: dynamic and joint optimization of resources in Frequency, Amplitude, Space, and Time (thus the name 'FAST') to overcome the attenuation and crosstalk bottlenecks, and the integration of communication, networking, computation, modeling, and distributed information management and control for the multi-user twisted pair network.

关键词： Copper Statistical multiplexing Multimedia algorithm development Stochastic processes Broadband telecommunications Optimization (mathematics) Video Network architectures Signal attenuation

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F-MAD: A Feature-Based Extension of the Most Apparent Distortion algorithm for Image Quality Assessment

F-MAD: A Feature-Based Extension of the Most Apparent Distor...

引用

Conference on Image Quality and System Performance X

作者： Singh, Punit Chandler, Damon M. Oklahoma State Univ Sch Elect & Comp Engn Lab Computat Percept & Image Qual Stillwater OK 74078 USA

ISBN: (纸本)9780819494269

In this paper, we describe the results of a study designed to investigate the effectiveness of peak signal-to-noise ratio (PSNR) as a quality estimator when measured in various feature domains. Although PSNR is well known to be a poor predictor of image quality, PSNR has been shown be quite effective for additive, pixel-based distortions. We hypothesized that PSNR might also be effective for other types of distortions which induce changes to other visual features, as long as PSNR is measured between local measures of such features. Given a reference and distorted image, five feature maps are measured for each image (lightness distance, color distance, contrast, edge strength, and sharpness). We describe a variant of PSNR in which quality is estimated based on the extent to which these feature maps for the reference image differ from the corresponding maps for the distorted image. We demonstrate how this feature-based approach can lead to improved estimators of image quality.

关键词： Image quality Distortion Databases Visualization Quality measurement Image analysis Image processing Signal to noise ratio Yield improvement algorithm development

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Quantum walks, automata and structured search

Quantum walks, automata and structured search

引用

Conference on Noise and Fluctuations in Photonics, Quantum Optics, and Communications

作者： Naguleswaran, Sanjeev Fuss, Ian White, Langford B. Univ Adelaide Sch Elect & Elect Engn Adelaide SA Australia

ISBN: (纸本)9780819467409

We explore the application of a quantum algorithm to optimisation problems over a structured space. For example, problems in automated planning can be represented as automata. These automata are shown to posses algebraic structure that can be exploited by a quantum period finding algorithm. The fact that the quantum walk also provides exponential speed-up over these same structures is of particular interest and results of our investigation will be presented.

关键词： algorithm development Quantum computing Quantum communications Space operations Fourier transforms Particles Quantum efficiency Superposition Control systems Telecommunications

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ADAPTIVE THRESHOLDING THROUGH MORPHOLOGICAL FILTERING 4

ADAPTIVE THRESHOLDING THROUGH MORPHOLOGICAL FILTERING

引用

4TH CONF ON NONLINEAR IMAGE PROCESSING

作者： ZHAO, DM Univ. of Michigan/Dearborn (United States)

ISBN: (纸本)0819411353

Morphological filtering is known for its flexibility in locally modifying geometrical features of three dimensional data, or image functions. The topic in this paper is on adaptive thresholding of multilevel image functions to extract application-specific features from grayscale images. By adaptive thresholding, we mean that the process of binarizing grayscale images is locally adjusted. The geometric features to be extracted are furnished by specifics from the application requirements, e.g., a binary version is needed from a photo to extract letters from a car license plate such that the binarized image is specifically representing the information about letters around the license plate while ignoring other background information. A contour function is used as the adaptive thresholding layer for the grayscale image. After the first thresholding, a binarized version is obtained and then local geometric parameters about the binary image are measured through a skeletonization process. The parameters from skeletonization are compared with the feature descriptions and a contour function is redefined and used for adaptively thresholding the grayscale image. A skeletonization process is then applied to the binarized image to extract local geometric parameters to meet the application- specific requirement. Application of the developed adaptive thresholding algorithm includes examples in text image binarization, object feature binarization against surrounding background, and glass flaw detection.

关键词： Image processing Binary data Frequency shift keying Feature extraction Nonlinear image processing Image filtering 3D image processing Digital filtering algorithm development Glasses

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Parallel filter structures for RLS-type blind equalization algorithms

Parallel filter structures for RLS-type blind equalization a...

引用

Conference on Advanced Signal Processing algorithms

作者： MOONEN, M DEPRETTERE, E KATHOLIEKE UNIV LEUVEN ESATB-3001 HEVERLEEBELGIUM

ISBN: (纸本)0819419222

It is shown that several RLS-type blind equalization algorithms, e.g., decision-directed schemes as well as 'orthogonalized' constant modulus algorithms, possess a common algorithmic structure and are therefore straightforwardly implemented on an earlier developed triangular array (filter structure) for recursive least squares estimation with inverse updating. While the computational complexity for such algorithms is O(N²), where N is the problem size, the throughput rate for the array implementation is O(1), i.e., independent of the problem size. Such a throughput rate cannot be achieved with standard (Gentleman-Kung- type) RLS/QR-updating arrays because of feedback loops in the computational schemes.

关键词： algorithm development Evolutionary algorithms Digital filtering Chemical elements Feedback loops Detection and tracking algorithms Data transmission Receivers Data communications Electrical engineering

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Phase closure and object reconstruction algorithm for Fourier Telescopy applied to fast-moving targets

Phase closure and object reconstruction algorithm for Fourie...

引用

Conference on Unconventional Imaging II

作者： Spivey, Brett Stapp, James Sandler, David Quexta Carlsbad CA 92009 USA Trex Enterprises Corp Albuquerque NM 87101 USA Trex Enterprises Corp San Diego CA 92121 USA

ISBN: (纸本)0819463868

Fourier Telescopy (FT) is an active imaging method which interferes spatially diverse, frequency-encoded laser beams on a distant target, and records a time history of the reflected intensity measured by a single photodetector on a large receiver. FT has been studied extensively for imaging Geostationary objects, using high-energy pulsed lasers to project triplets of laser beams, by gradually stepping over time through the multitude of u,v-plane baselines required for accurate object reconstruction. Phase closure among the received triplets plays a key role in canceling out random atmospheric phase errors between laser beams. A new method has been devised to apply FT to rapidly moving targets, such as LEO space objects. In order to implement the thousands of baselines in a short engagement time, approximately 20 continuous-wave laser beams are simultaneously broadcast, and the baseline configurations are rapidly changed through a dynamic optical element. In order to eliminate unknown atmospheric errors, a new type of global phase closure has been developed, which allows image reconstruction from the time history of measured total reflected intensity, originating from the complex 20-beam interference patterns. In this paper, we summarize the new FT LEO method, and give a detailed derivation of the phase closure and image reconstruction algorithms that will lead to ultra-high resolution images of fast-moving space objects.

关键词： Reconstruction algorithms Transmitters Spatial frequencies Fourier transforms Signal to noise ratio algorithm development Telescopes Phase shifts Image restoration Receivers

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