Searching for authors named "Anastasios Delopoulos" – sorted by Relevance.
10 documents found, showing 1 through 10.
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A COMPARATIVE STUDY ON 3D MOTION ESTIMATION UNDER ORTHOGRAPHY
- …In the present work, the algorithm proposed in [8,10] is tested against existing approaches on 3D motion and structure estimation of rigid objects under orthography. The theoretical relation between the proposed approach and the well-known factorization and epipolar methods is discussed. At the same…
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Cumulant-based autocorrelation estimates of non-Gaussian linear processes
- …Autocorrelation of linear random processes can be expressed in terms of their cumulants. Theoretical insensitivity of the latter to additive Gaussian noise of unknown covariance, is exploited in this paper to develop (within a scale) autocorrelation estimaters of linear non-Gaussian time series usin…
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A Multiresolution Approach for Main Mobile Object Localization in Video Sequences
- …Main mobile object localization is a task that emerges in research fields such us video understanding, object-based coding and various related applications, such as contentbased retrieval, remote surveillance and object recognition.…
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Intelligent Semantic Access to Audiovisual Content
- …Abstract. In this paper, an integrated information system is presented that offers enhanced search and retrieval capabilities to users of heterogeneous digital audiovisual (a/v) archives. This novel system exploits the advances in handling a/v content and related metadata, as introduced by MPEG-4 an…
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User Choices for Efficient 3D Motion and Shape Extraction from Orthographic Projections
- …The problem of estimating three dimensional motion and structure of objects from monoc-ular image sequences has drawn particular attention since the past decade. The extraction of structure-from-motion emerges in research elds such us computer vision, video coding, biomedical engineering and human-c…
- Cited by 1 (1 self) – Add To MetaCart
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Optimal Subband Analysis Filters Compensating for
- …In this paper, we present an analysis #lter design technique which optimally de#nes the proper decimator so that the quantization noise is compensated. The analysis is based on a distortion criterion minimization using the Lagrange multipliers. The optimal decimation #lters are derived through a Ric…
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Image annotation using clickthrough data
- …Automatic image annotation using supervised learning is performed by concept classifiers trained on labelled example images. This work proposes the use of clickthrough data collected from search logs as a source for the automatic generation of concept training data, thus avoiding the expensive manua…
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Integrating Multimedia Archives: The Architecture and the Content Layer
- …Abstract—In the last few years, numerous multimedia archives have made extensive use of digitized storage and annotation technologies. Still, the development of single points of access, providing common and uniform access to their data, despite the efforts and accomplishments of standardization orga…
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An intelligent system for retrieval and mining of audiovisual material based on the MPEG-7 description schemes
- …ABSTRACT: A system for digitization, storage and retrieval of audiovisual information and its associated data (metainfo) is presented. The principles of the evolving MPEG-7 standard have been adopted for the creation of the data model used by the system, permitting efficient separation of database d…
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ULTRASONIC ARRAY IMAGING USING CDMA TECHNIQUES
- …A new method for designing ultrasonic imaging systems is presented in this paper. The method is based on the use of transducer arrays whose elements transmit wideband signals generated by pseudo-random codes, similarly to code division multiple access (CDMA) systems in communications. The use of cod…
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