A digital stereophotogrammetric system is being developed to perform photogrammetric tasks with a minimum of cost and hardware operating complexity. The standard IBM PC-AT/486 is used as system processing unit. Two st...
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ISBN:
(纸本)0819416851
A digital stereophotogrammetric system is being developed to perform photogrammetric tasks with a minimum of cost and hardware operating complexity. The standard IBM PC-AT/486 is used as system processing unit. Two stereo vision modes are available: anagliphic and mirror. With the use of aerosurvey and spaceaerosurvey photographs of different projections, the problems of interior, relative and absolute orientation are solved in a rigorous and efficient way. On the future stage of system development digital information from satellites will be processed. Stereomeasurement operations can be executed both in manual and automatic way. The systems enables processing of digital images exceeding disk memory capacities, hence the images with pixel size of 5 - 10 mkm can be processed. Digital images areas under operation are stored on the disk beforehand. System software enables fast and easy access to any area of any image stored on the disk.
The Complex Arithmetic Processor (CAP) is a high performance, single chip Digital Signal Processor optimized for communication signal processing operations. The CAP vLSI provides the communication system building bloc...
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ISBN:
(纸本)0819416207
The Complex Arithmetic Processor (CAP) is a high performance, single chip Digital Signal Processor optimized for communication signal processing operations. The CAP vLSI provides the communication system building block necessary to meet the increased signal processing requirements of complex modulation types, voice and image compression while maintaining the requirement for small, low power implementations. The chip is intended for high speed, low power digital communication system applications such as hand held spread spectrum communications systems. The CAP architecture has been developed specifically for the complex arithmetic functions required in communication signal processing. The CAP is a software programmable, highly integrated parallel array of processors containing the arithmetic resources, memories, address generation, bit manipulation and logic functions necessary to support the sophisticated processing required in advanced communication equipment. The CAP executes a 1024 point complex Fast Fourier Transform in 131 microseconds.
Iconic programming intends to provide expressive tools to implement, to debug, and to execute programs. For this purpose, visual languages need pictorial constructs and metaphors to guide the design of algorithms in i...
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This paper describes a new robust stereo and motion analysis algorithm to meet the special demands of a multiview 3D Tv system. Based on this algorithm, images can be synthesized for any virtual camera position within...
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ISBN:
(纸本)0819414727
This paper describes a new robust stereo and motion analysis algorithm to meet the special demands of a multiview 3D Tv system. Based on this algorithm, images can be synthesized for any virtual camera position within the array covered by the real cameras. It is possible to create any number of perspective views needed for smooth motion parallax in multiview systems. For the reconstruction of a scene, 3D line segments are estimated by triangulation of corresponding 2D line segments (disparity estimation). This estimation of 3D segments is carried out more dependably by the combination of stereo and motion information and -- to achieve further improvements -- the utilization of multiocular stereo. New measures for a more reliable estimation of the scene are proposed. To achieve subjectively error-free estimations, Prazdny's coherence principle is extended to motion and image sequences as well as sub-constellations of the multi-camera rig. This algorithm comes up with a 4D space-time model of the scene by the cooperation of multi-camera motion and stereo.
Basic models of neuron-like media and corresponding sets of spatio-temporal solutions are considered. The ways to use these models and solutions as basic units for designing hierarchic systems of decision making with ...
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Autonomous Intelligent Cruise Control (AICC) systems are not only controlling the vehicles speed, but also acting on the throttle and eventually on the brakes, they could automatically maintain the relative speed and ...
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The problem of optimal detecting and isolating faults in systems with random disturbances is discussed. The fault (change) detection problem has received extensive research attention. On the contrary, the change isola...
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The problem of optimal detecting and isolating faults in systems with random disturbances is discussed. The fault (change) detection problem has received extensive research attention. On the contrary, the change isolation is still an unsolved problem. A system with abrupt changes and random disturbances is considered. A joint criterion of optimality for the detection/isolation problem is introduced and a change detection/isolation algorithm is designed. It is proved that this algorithm is asymptotically optimal in a certain class of sequential change detection/isolation algorithms. The theoretical results are illustrated by examples of navigation system integrity monitoring.
A corner is modelled as the intersection of two lines. A corner point is that point on an input digital arc whose a posteriori probability of being a corner is the maximum among all the points on the arc. The performa...
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A corner is modelled as the intersection of two lines. A corner point is that point on an input digital arc whose a posteriori probability of being a corner is the maximum among all the points on the arc. The performance of the corner detector is characterized by its false alarm rate, misdetection rate, and the corner location error all as a function of the noise variance, the included corner angle, and the arc length. Theoretical expressions for the quantities compare well with experimental results.< >
Perceptual grouping is a key step in vision to organize image data into structural hypotheses to be used for high level analysis. We propose data allocation and load balancing strategies which reduce the communication...
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Perceptual grouping is a key step in vision to organize image data into structural hypotheses to be used for high level analysis. We propose data allocation and load balancing strategies which reduce the communication cost and evenly distribute the grouping operations among the processors. These techniques result in scalable algorithms for performing perceptual grouping on CM-5. The performance of our algorithms depends only on the total grouping operations generated by the image data and is independent of the distribution of the data among the processors. Our implementations show that given a 1 K/spl times/1 K input image, extraction of line segments and several perceptual grouping steps can be performed in 5.0 seconds using a partition of CM-5 having 32 processing nodes. A serial implementation of these steps on a Sun Sparc 400 takes more than 2 minutes.
To improve Tvimage quality without changing the current transmission standards, advanced soft-decision fuzzy logic techniques have been applied to remove noise affecting pictures and to avoid interlaced-scan-related ...
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To improve Tvimage quality without changing the current transmission standards, advanced soft-decision fuzzy logic techniques have been applied to remove noise affecting pictures and to avoid interlaced-scan-related artifacts, thus leading to the definition of a new Fuzzy Noise Reducer and Scanning Rate Converter system.
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