| Records |
Author  |
Petia Radeva; Jordi Vitria; Fernando Vilariño; Panagiota Spyridonos; Fernando Azpiroz; Juan Malagelada; Fosca de Iorio; Anna Accarino |
| Title |
Cascade analysis for intestinal contraction detection |
Type |
Patent |
| Year |
2009 |
Publication |
US 2009/0284589 A1 |
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USPO |
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Pages |
1-25 |
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| Abstract |
A method and system cascade analysisi for intestinal contraction detection is provided by extracting from image frames captured in-vivo. The method and system also relate to the detection of turbid liquids in intestinal tracts, to automatic detection of video image frames taken in the gastrointestinal tract including a field of view obstructed by turbid media, and more particulary, to extraction of image data obstructed by turbid media. |
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US Patent Office |
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US Patent Office |
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MILAB; OR; MV;SIAI |
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no |
| Call Number |
IAM @ iam @ RVV2009 |
Serial |
1700 |
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| Author |
Petia Radeva; Jordi Vitria |
| Title |
Region Based Approach for Discriminant Snakes. |
Type |
Miscellaneous |
| Year |
2001 |
Publication |
Proceedings IEEE International Conference on Image Processing, 801–804. |
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OR;MILAB;MV |
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no |
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BCNPCL @ bcnpcl @ RVi2001 |
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160 |
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| Author |
Petia Radeva; Jordi Vitria |
| Title |
“Inteligencia artificial” Centre de Visio per Computador |
Type |
Miscellaneous |
| Year |
2003 |
Publication |
Europacork.com (Digital Journal) Any II num. 7 |
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OR;MILAB;MV |
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BCNPCL @ bcnpcl @ RaV2003b |
Serial |
404 |
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| Author |
Petia Radeva; Jordi Vitria |
| Title |
Region-Based Approach for Discriminant Snakes |
Type |
Miscellaneous |
| Year |
2001 |
Publication |
Proceedings of ICIP |
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Thesaloniki, Greece |
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OR;MILAB;MV |
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no |
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BCNPCL @ bcnpcl @ RaV2001 |
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436 |
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| Author |
Petia Radeva; Jordi Vitria |
| Title |
Discriminant Projections Embedding for Nearest Neighbor Classification |
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Miscellaneous |
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2004 |
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9th Iberoamerican Congress on Pattern Recognition, LNCS 3287:312–319 |
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Puebla (Mexico) |
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OR;MILAB;MV |
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no |
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BCNPCL @ bcnpcl @ RaV2004a |
Serial |
471 |
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| Author |
Petia Radeva; Jordi Vitria |
| Title |
Corkinspect: Statistical Learning of Natural Material |
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Journal |
| Year |
2004 |
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Italian Beverage Technology, 13(38):11–18 |
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OR;MILAB;MV |
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no |
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BCNPCL @ bcnpcl @ RaV2004b |
Serial |
514 |
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| Author |
Petia Radeva; Joan Serrat; Enric Marti |
| Title |
A snake for model-based segmentation |
Type |
Conference Article |
| Year |
1995 |
Publication |
Proc. Conf. Fifth Int Computer Vision |
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Pages |
816-821 |
| Keywords |
snakes; elastic matching; model-based segmenta tion |
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Despite the promising results of numerous applications, the hitherto proposed snake techniques share some common problems: snake attraction by spurious edge points, snake degeneration (shrinking and attening), convergence and stability of the deformation process, snake initialization and local determination of the parameters of elasticity. We argue here that these problems can be solved only when all the snake aspects are considered. The snakes proposed here implement a new potential eld and external force in order to provide a deformation convergence, attraction by both near and far edges as well as snake behaviour selective according to the edge orientation. Furthermore, we conclude that in the case of model-based seg mentation, the internal force should include structural information about the expected snake shape. Experiments using this kind of snakes for segmenting bones in complex hand radiographs show a signi cant improvement. |
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MILAB;ADAS;IAM |
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no |
| Call Number |
IAM @ iam @ RSM1995 |
Serial |
1634 |
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| Author |
Petia Radeva; Joan Serrat |
| Title |
Rubber Snake: Implementation on Signed Distance Potential. |
Type |
Conference Article |
| Year |
1993 |
Publication |
Vision Conference |
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Pages |
187-194 |
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Zurich, Switzerland. |
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SWISS |
| Notes |
ADAS;MILAB |
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no |
| Call Number |
ADAS @ adas @ RaS1993 |
Serial |
170 |
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| Author |
Petia Radeva; J. Guerrero; C. Molina |
| Title |
A Physics-Based Kohonen Ring. |
Type |
Miscellaneous |
| Year |
1998 |
Publication |
SPIE – Medical Imaging. |
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San Diego; CA; USA |
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MILAB |
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no |
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BCNPCL @ bcnpcl @ RGM1998 |
Serial |
19 |
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| Author |
Petia Radeva; Enric Marti |
| Title |
Facial Features Segmentation by Model-Based Snakes. |
Type |
Miscellaneous |
| Year |
1995 |
Publication |
Trobada de Joves Investigadors, IIIA. |
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Bellaterra (Barcelona), Spain |
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MILAB; IAM |
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BCNPCL @ bcnpcl @ RaM1995a |
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130 |
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| Author |
Petia Radeva; Enric Marti |
| Title |
An improved model of snakes for model-based segmentation |
Type |
Conference Article |
| Year |
1995 |
Publication |
Proceedings of Computer Analysis of Images and Patterns |
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515-520 |
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The main advantage of segmentation by snakes consists in its ability to incorporate smoothness constraints on the detected shapes that can occur. Likewise, we propose to model snakes with other properties that reflect the information provided about the object of interest in a different extent. We consider different kinds of snakes, those searching for contours with a certain direction, those preserving an object’s model, those seeking for symmetry, those expanding open, etc. The availability of such a collection of snakes allows not only the more complete use of the knowledge about the segmented object, but also to solve some problems of the existing snakes. Our experiments on segmentation of facial features justify the usefulness of snakes with different properties. |
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CAIP |
| Notes |
MILAB;IAM |
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no |
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IAM @ iam @ RaM1995b |
Serial |
1632 |
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| Author |
Petia Radeva; Enric Marti |
| Title |
Facial Features Segmentation by Model-Based Snakes |
Type |
Conference Article |
| Year |
1995 |
Publication |
International Conference on Computing Analysis and Image Processing |
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Deformable models have recently been accepted as a standard technique to segment different features in facial images. Despite they give a good approximation of the salient features in a facial image, the resulting shapes of the segmentation process seem somewhat artificial with respect to the natural feature shapes. In this paper we show that active contour models (in particular, rubber snakes) give more close and natural representation of the detected feature shape. Besides, using snakes for facial segmentation frees us from the problem of determination of the numerous weigths of deformable models. Another advantage of rubber snakes is their reduced computational cost. Our experiments using rubber snakes for segmentation of facial snapshots have shown a significant improvement compared to deformable models. |
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Bellaterra (Barcelona), Spain |
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MILAB;IAM |
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IAM @ iam @ RAM1995a |
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1633 |
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| Author |
Petia Radeva; Cristina Cañero; Juan J. Villanueva; J. Mauri; E Fernandez-Nofrerias |
| Title |
3D Reconstruction of a Stent by Deformable Models. |
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Miscellaneous |
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2001 |
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Proceedings of the IASTED International Conference, Visualization, Imaging and Image Processing, 417–422. |
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Marbella. |
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MILAB |
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no |
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BCNPCL @ bcnpcl @ RCV2001 |
Serial |
158 |
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| Author |
Petia Radeva; Amir Amini; Jintao Huang; Enric Marti |
| Title |
Deformable B-Solids: application for localization and tracking of MRI-SPAMM data |
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Report |
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1996 |
Publication |
CVC Technical Report |
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8 |
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To date, MRI-SPAMM data from different image slices have been analyzed independently. In this paper, we propose an approach for 3D tag localization and tracking of SPAMM data by a novel deformable B-solid. The solid is defined in terms of a 3D tensor product B-spline. The isoparametric curves of the B-spline solid have special importance. These are termed implicit snakes as they deform under image forces from tag lines in different image slices. The localization and tracking of tag lines is performed under constraints of continuity and smoothness of the B-solid. The framework unifies the problems of localization, and displacement fitting and interpolation into the same procedure utilizing B-spline bases for interpolation. To track motion from boundaries and restrict image forces to the myocardium, a volumetric model is employed as a pair of coupled endocardial and epicardial B-spline surfaces. To recover deformations in the LV an energy-minimization problem is posed where both tag and ... |
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CVC (UAB) |
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MILAB;IAM |
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no |
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IAM @ iam @ RHM1996 |
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1631 |
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| Author |
Petia Radeva; A.F. Sole; Antonio Lopez; Joan Serrat |
| Title |
Detecting Nets of Linear Structures in Satellite Images. |
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Miscellaneous |
| Year |
1998 |
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Londres |
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ADAS;MILAB |
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ADAS @ adas @ RSL1998 |
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25 |
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