A relaxation-contour method for retrieving motion vectors from sequential satellite images is presented. The contour part explores image contours (level set) to extract targets (extreme points on these contours). Moti...
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A relaxation-contour method for retrieving motion vectors from sequential satellite images is presented. The contour part explores image contours (level set) to extract targets (extreme points on these contours). Motion vectors are derived by examining the correspondence between targets extracted from symmetrical pairs of images. The basic criterion is geometrical similarity of contours taken at the same level (contour matching), while gradient information is used to sustain robustness of search. Vague contouring generates much more motion vectors than by the current template matching methodology. Naturally, many invalid vectors are generated in this way, yet their abundance gives preferentiality to a relaxation labeling approach aimed at selection of correct vectors from several candidates to be consistent (in space and time) with others. Estimates of water vapor motion vectors obtained using relaxation-contour and maximum cross-correlation (with and without relaxation labeling) methods have been compared to those derived manually. Results show advantages of the relaxation-contour method both in density and quality. We contemplate future integration of this scheme with assimilation models.
One of the main activities of the institute of automation and control processes feb ras is development, implementation and support (together with the service company LLC "Infovira") of information and analyt...
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Oil refining is an energy-intensive process that continuously separates petroleum products. Refining companies are interested in products that meet all regulations and the efficiency of their production. It is possibl...
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The characteristics of partial discharges (PD) which make possible to draw conclusions about the technical condition of high-voltage equipment are considered. (HVE). The efficiency and feasibility of applying existing...
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This paper describes the system of telecontrol by multi-link manipulator. This system allows carrying out objects grasp by the manipulator in an automatic mode using known position and orientation of these objects. Th...
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In this paper, we propose a method of constructing a mobile robot (MR) navigation system (NS) based on fusion of data obtained from onboard sensors and video camera with use of extended Kalman filter (EKF), which allo...
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ISBN:
(纸本)9789898533524
In this paper, we propose a method of constructing a mobile robot (MR) navigation system (NS) based on fusion of data obtained from onboard sensors and video camera with use of extended Kalman filter (EKF), which allows significantly improve the accuracy of MR navigation in conditions where global positioning systems are not available or have a greater error. The budgetary webcam which, at the expense of the low price, allows to reduce the cost of system in general acts as the video data obtaining device. The method proposed consists of two steps. The first step is obtaining MR movement and orientation data based on video processing. A second step is the fusion of said navigation data and data obtained from the MR onboard sensors.
A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy c...
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A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy cluster, computation of TC eye size and location, estimation of TC center and geometry of cloudy swirling. The main procedure of TC center estimation uses cloudy structure charts in a form of dominant orientation of thermal contrasts (DOTC). The DOTCs can be used as estimations of wind velocity directions. The procedure computes the TC center on the base of a model of circular movement. The method approbation on satellite images of Far-Eastern region for three year summer seasons has demonstrated high reliability (the centers have been computed almost always) and good correspondence with the results of Japan Meteorological Agency and Joint Typhoon Warning Center (USA). The TC tracks are used for automatic computation of typhoon warm core, humidity parameters and near surface wind velocity on the base of atmosphere profiles of temperature and humidity retrieved from ATOVS/NOAA radiometer measurements.
The paper presents an algorithm that allows determining the velocity required for the motion of an autonomous underwater vehicle (AUV) along the trajectory described by a third-order parametric spline with considerati...
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The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud comp...
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The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud computing technology.
The paper provides an introduction into the area of inductive formation of knowledge bases and highlights the current topical problems, including the interpretability of the results. A method is suggested for inductiv...
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The paper provides an introduction into the area of inductive formation of knowledge bases and highlights the current topical problems, including the interpretability of the results. A method is suggested for inductive formation of easily interpretable medical diagnostic knowledge bases. It includes the new definitions of classification and clustering problems for dependence model with parameters, the learning algorithm (solving mentioned problems in their new definitions) is developed for the practically useful and easily interpretable mathematical dependence model with parameters, which is a near real-life ontology of medical diagnostics (defined by a system of logical relationships with parameters). Also included is the software package InForMedKB (INductive FORmation of MEDical Knowledge Bases), which implements this mentioned learning algorithm.
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