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检索条件"任意字段=Proceedings of SPIE-IS and T Electronic Imaging - Image Processing: Algorithms and Systems IV"

共 281 条记录，以下是251-260 订阅

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EStIMAtION OF PROSPECtivE LOCAtIONS IN MAtURE HYDROCARBON PRODUCING AREAS 2

引用

CONF ON image processing algorithms AND tECHNIQUES

作者： ISAKSEN, t Exxon Production Research Co. (United States)

ISBN: (纸本)0819405515

Kalman filtering is a methodology that has demonstrated great potential for solving a large number of problems in many areas. It has so far had its greatest success in the areas of control theory and process control, but is a method and it is not limited to this area. there are a great number of areas within oil and gas exploration where it can prove to be of great success. Of particular interest is an aid to exploration in mature hydrocarbon provinces. the identification of remaining reserves of hydrocarbons in stratigraphic traps in the world's mature hydrocarbon provinces is a difficult task. Often these traps are small compounding identification. A subset of this general problem is the appropriate location of new wells in known producing areas. the task reported on herein has been to complete an uncompleted pattern of successful and unsuccessful wells. two dimensional Kalman filter and interpolation theory is used to estimate successful and unsuccessful well locations. Based on a map of the known well locations, the image representing the estimated pattern is completed. the majority of image pixels in this particular case will be unknown, and not just distorted off of its original value by noise. Examples are detailed and discussed.

关键词： Filtering (signal processing) image processing electronic filtering image analysis Process control Digital filtering Interference (communication) image filtering Information operations Silicon

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Integrated color management: the key to color control in electronic imaging and graphic systems

Integrated color management: the key to color control in ele...

引用

image Handling and Reproduction systems Integration

作者： taylor, Joann M. Tektronix Inc. Beaverton OR USA

ISBN: (纸本)0819405590

the continuing evolution of color in both established and new electronic imaging and graphics markets plus the parallel growth of user expectation resulting in the demand for WYSIWYG color across devices points directly to the need for a unified color management approach that addresses the complex and multi-level requirements of system implementors, application and hardware vendors, as well as users. Such a system should provide extensible, device- and computing platform-independent access to state of the art color functionality. the principal elements of such an integrated system are discussed.

关键词： image processing

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Camera zoom/pan estimation and compensation for video compression 2

Camera zoom/pan estimation and compensation for video compre...

引用

spie/IS&t Symposium on electronic imaging Science and technology

作者： tse, Yi tong Baker, Richard L. Univ of California Los Angeles United States

Most image coding algorithms, like the P × 64 and MPEG-1 standards, use locally derived estimates of object motion to form a prediction of the current frame. But camera motion, such as zooms and pans, which systematically affect the entire frame, is seldom handled efficiently. In this paper, we study the modeling, estimation and compensation of global motion caused by camera zooms and pans. We model the global motion in each frame with just two parameters: a scalar zoom factor and a two-dimensional pan vector. Parameter estimation minimizes the squared prediction error of either the difference frame or the optical flow field. the estimated parameters are then used to construct a zoom/pan compensated prediction of the current frame, upon which some local motion compensation algorithm can then be applied to model object motion. Simulations suggest that these two global motion estimation algorithms are robust and accurate, and that global motion compensation provides a better prediction of the current frame with a potentially large reduction of motion side information.

关键词： image processing

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Efficient transformation algorithm for 3D images

Efficient transformation algorithm for 3D images

引用

spie/IS&t Symposium on electronic imaging Science and technology

作者： Vepsalainen, A.M. Rantala, A.E. Technical Research Cent of Finland Helsinki Finland

An efficient transformation algorithm for 3 dimensional images is presented. the algorithm is fairly amenable to parallelization. Its implementation in a transputer network will be discussed. the presented algorithms ... 详细信息

关键词： image processing

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Geometrical and morphological image processing algorithm

Geometrical and morphological image processing algorithm

引用

spie/IS&t Symposium on electronic imaging Science and technology

作者： Reihani, Kamran thompson, Wiley E. New Mexico State Univ Las Cruces United States

Early vision processing involves segmenting and eliminating/minimizing extrinsic variations in an image. traditional segmentation algorithms use a single threshold to reduce image data to the regions important to the vision system. A single threshold rarely gives good segmentation results over an entire image because it may reject too many of the objects as belonging to the background or may accept too much of the background as belonging to the objects. this paper presents a segmentation method that uses multiple thresholds for partitioning an image into objects and background. the segmentation process is a gradient approach whereby the multiple (or adaptable) thresholds are calculated from discriminant structural feature values.

关键词： image processing

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Parallel processing approach to transform based image coding

Parallel processing approach to transform based image coding

引用

spie/IS&t Symposium on electronic imaging Science and technology

作者： Normile, James Wright, Dan Chu, Ken Yeh, Lung Apple Computer ATG Cupertino United States

this paper describes a flexible parallel processing architecture designed for use in real time video processing. the system consists of floating point DSP processors connected to each other via fast serial links, each processor has access to a globally shared memory. A multiple bus architecture in combination with a dual ported memory allows communication with a host control processor. the system has been applied to prototyping of video compression and decompression algorithms. the decomposition of transform based algorithms for decompression into a form suitable for parallel processing is described. An technique for automatic load balancing among the processors is developed and discussed, results are presented with image statistics and data rates. Finally techniques for accelerating the system throughput are analyzed and results from the application of one such modification described.

关键词： image processing

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Study on objective fidelity for progressive image transmission systems

Study on objective fidelity for progressive image transmissi...

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spie/IS&t Symposium on electronic imaging Science and technology

作者： Lin, Eleanor Lu, C.C. Siemens Gammasonic Inc Hoffman Estates United States

With the continuing growth of modern communication technologies, the demand for image transmission is increasing rapidly. transmitting a high resolution images over low bandwidth communication lines usually requires a great amount of time and the user interaction with such a transmission environment can become frustrating. the problem can be eased somewhat by transmitting a series of low resolution approximations which outlines the final image. Progressive image transmission is being applied in interactive image communications that transmit over low bandwidth channels. the progressive build-up is a way of reordering the coded data prior transmission, so that a rough approximation will appear first and be followed by successively more detailed versions of the final image. In this paper, we investigate the objective fidelity for several widely used progressive gray-level image transmission algorithms which include both time and frequency-domain approaches, and also propose some efficient implementations to improve their performance without increasing computational complexity.

关键词： image processing

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1.3 Megapixel resolution portable CCD electronic still camera

1.3 Megapixel resolution portable CCD electronic still camer...

引用

Camera and Input Scanner systems

作者： Jackson, todd A. Bell, Cynthia S. Eastman Kodak Co Rochester United States

Portable electronic still cameras have been available for some years although, in general, the image quality has fallen short of the 35 mm film quality benchmark. to obtain improved image capture and reproduction, higher resolution CCD imagers with wider dynamic ranges must be employed in these cameras. A camera system composed of a 35 mm Nikon F3 camera body, a camera back containing a CCD-imager, and a portable hard drive for storing digitized images was constructed and employed to acquire images distributed over photospace. this paper describes the camera's hardware and capabilities, the software post-processing, the camera's characteristics, and a method for evaluating the camera's performance.

关键词： Cameras

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On the determination of optimal window for registration of nonlinear distributed images 2

On the determination of optimal window for registration of n...

引用

spie/IS&t Symposium on electronic imaging Science and technology

作者： Lure, Y.M.Fleming Caelum Research Corp Silver Spring United States

Determination of an optimal window to improve the performance for registering nonlinear distorted images using a cross-correlation technique is presented in this paper. A two-dimensional cross-correlation technique is applied to two meteorological radar images (the search and reference images) which possess the characteristics of nonlinearity, geometric distortion, and ever-evolving pattern. Various sizes of concentric square windows of the reference image are used for computing the cross-correlation field. Parameters of cross-correlation field such as peak value, location of the peak, and standard deviation are determined. the location of the peak correlation, instead of its peak value, is chosen as an indicator which best describes the performance of registration, since the location remains unchanged for certain sizes of the window. this location represents the translation shift of the images or the offset of the registration. these windows cover a major portion of the auto-correlation area of the reference image. the standard deviation of the cross-correlation field between search and references images reaches its maximum for these window sizes which are considered as optimal.

关键词： Radar imaging

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Edge-based block matching technique for video motion estimation

Edge-based block matching technique for video motion estimat...

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spie/IS&t Symposium on electronic imaging Science and technology

作者： Han, Richard Zakhor, Avideh Univ of California Berkeley United States

An important part of most video compression techniques is displacement vector estimation, which in many situations is achieved by Block Matching algorithms (BMA). traditional BMA uses costly integer arithmetic on 8-bit images to minimize a Mean Absolute Error (MAE) criterion that determines the displacement estimate. In this paper, we present an approach for motion estimation based on binary edged images. Specifically, we assign an intensity gradient vector to each edge pixel and apply BMA to the gradient vector. Our approach can potentially reduce the complexity of the VLSI implementation of motion estimation algorithms. We present simulation results comparing this technique to traditional BMA over several 50-frame sequences.

关键词： image processing

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