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.
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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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 interactive fashion. In the paper a new class of dynamic visual interfaces, named DIvA (Dynamic Interface for visual Applications), is introduced, its properties are described, and an application to visual compilers in a multi-processors system dedicated to image analysis is given. Moreover, a formal definition of dynamic icon (DI) is also given.
Real-time vision is central to many embedded applications (e.g. vehicle guidance). It is a computationally intensive task well beyond current general purpose computing platforms such as PCs and workstations. Thus, mos...
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Real-time vision is central to many embedded applications (e.g. vehicle guidance). It is a computationally intensive task well beyond current general purpose computing platforms such as PCs and workstations. Thus, most real time vision systems need special high performance computing platforms, commonly provided in the form of parallel processing engines or dedicated hardware. The proposed architecture uses new generations of re-programmable logic devices and modularised hardware, thereby gaining the performance advantage of hard-wired logic with the flexibility and associated economies of programmable systems. The architecture takes the form of an extensive processing hierarchy consisting of a set of tightly coupled parallel processors, each processing a portion of the image using a classic pipeline arrangement. A programmable image splitting (and reconstruction) engine feeds this array and offers the potential of further enhancing the performance of the engines by restructuring the pixel distribution (bit-shuffling) so as to match the requirements of the executing algorithms. The physical implementation will be based on a modularised bus system together with EPLD processing devices. The authors report on the predicted performance of low level vision functions running on this architecture.< >
Real time digital signal processing demands high performance implementations of division and square root. This can only be achieved by the design of fast and efficient arithmetic algorithms which address practical vLS...
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Real time digital signal processing demands high performance implementations of division and square root. This can only be achieved by the design of fast and efficient arithmetic algorithms which address practical vLSI architectural design issues. In this paper, new algorithms for division and square root are described. The new schemes are based on pre-scaling the operands and modifying the classical SRT method such that the result digits and the remainders are computed concurrently and the computations in adjacent rows are overlapped. Consequently, their performance exceeds that of the SRT methods. The hardware cost for higher radices is considerably more than that of the SRT methods but for many applications, this is not prohibitive. A system of equations is presented which enables both an analysis of the method for any radix and the parameters of implementations to be easily determined. This is illustrated for the case of radix 2 and radix 4. In addition, a highly regular array architecture combining the division and square root method is described.
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