Searching for authors named "Petros Maragos" – sorted by Relevance.

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37 documents found, showing 1 through 10. Next 10 →

Morphological scale-space representation with levelings
by Petros Maragos — 1999 — in Scale-Space’99, ser. Lecture Notes in Computer Science
…Abstract. A morphological scale-space representation is presented based on a morphological strong filter, the levelings. The scale-properties are analysed and illustrated. From one scale to the next, details vanish, but the contours of the remaining objects are preserved sharp and perfectly localise…
Cited by 4 (1 self) – Add To MetaCart

Multiscale morphological segmentations based on watershed, flooding, and eikonal PDE
by Petros Maragos — 1999 — Scale-Space Theories in Computer Vision
…Abstract. The classical morphological segmentation paradigm is based on the watershed transform, constructed by flooding the gradient image seen as a topographic surface. For flooding a topographic surface, a topographic distance is defined from which a minimum distance algorithm is derived for the …
Cited by 4 (1 self) – Add To MetaCart

PDE-based modeling of image segmentation using volumic
by Anastasia Sofou, Petros Maragos — 2003 — in IEEE ICIP03
…The classical case of morphological segmentation is based on the watershed transform, constructed by flooding the gradient image, which is seen as a topographic surface, with constant height speed. Changing the flooding criteria, (e.g constant-speed height, area or volume) yields different segmentat…
Cited by 1 (0 self) – Add To MetaCart

Nonlinear scale-space representation with morphological levelings
by Fernand Meyer, Petros Maragos — 2000 — J. of Visual Comm. and Image Representation
…In this paper we present a nonlinear scale-space representation based on a general class of morphological strong filters, the levelings, which include the openings and closings by reconstruction. These filters are very useful for image simplification and segmentation. From one scale to the next, det…
Cited by 4 (0 self) – Add To MetaCart

A Detection-Theoretic Approach to Texture and Edge Discrimination
by Iasonas Kokkinos, Petros Maragos — 2005 — In 4th International Workshop on Texture Analysis and Synthesis
…We present a probabilistic approach to the discrimination between textured areas and edges; locally defined probabilistic models are used, which model textured areas as sinusoidal and edges as phase-congruent signals. We build a link with energy-based feature detection and propose a simple approach …
Cited by 2 (2 self) – Add To MetaCart

A.L.: Bottom-up & top-down object detection using primal sketch features and graphical models
by Iasonas Kokkinos, Petros Maragos — 2006 — In: Proc. Intl. Conf. on Computer Vision and Pattern Recognition
…A combination of techniques that is becoming increasingly popular is the construction of part-based object representations using the outputs of interest-point detectors. Our contributions in this paper are twofold: first, we propose a primal-sketch-based set of image tokens that are used for object …
Cited by 4 (3 self) – Add To MetaCart

Synergy Between Object Recognition and Image Segmentation using the Expectation Maximization Algorithm
by Iasonas Kokkinos, Petros Maragos
…Abstract — In this work we formulate the interaction between image segmentation and object recognition in the framework of the Expectation Maximization (EM) algorithm. We consider segmentation as the assignment of image observations to object hypotheses and phrase it as the E-step, while the M-step …
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P.: An Expectation Maximization approach to the synergy between image segmentation and object categorization
by Iasonas Kokkinos, Petros Maragos — 2005 — In: ICCV
…In this work we deal with the problem of modelling and exploiting the interaction between the processes of image segmentation and object categorization. We propose a novel framework to address this problem that is based on the combination of the Expectation Maximization (EM) algorithm and generative…
Cited by 5 (3 self) – Add To MetaCart

A Comparison of the Energy Operator and the Hilbert Transform Approach to Signal and Speech Demodulation
by Alexandros Potamianos, Ros Potamianos, Petros Maragos, Prof Petros Maragos — 1994
…1 The Hilbert transform together with Gabor's analytic signal provides a standard linear integral approach to estimate the amplitude envelope and instantaneous frequency of signals with a combined amplitude modulation (AM) and frequency modulation (FM) structure. An alternative recent approach u…
Cited by 6 (4 self) – Add To MetaCart

Higher-Order Differential Energy Operators
by Petros Maragos, Alexandros Potamianos, Ros Potamianos — 1995
…Instantaneous signal operators \Upsilon k (x) = xx (k\Gamma1) \Gamma xx (k) of integer orders k are proposed to measure the cross energy between a signal x and its derivatives. These higherorder differential energy operators contain as a special case, for k = 2, the Teager-Kaiser operator. When…
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