| Records |
| Author |
Jaume Garcia; Petia Radeva; Francesc Carreras |
| Title |
Combining Spectral and Active Shape methods to Track Tagged MRI |
Type |
Book Chapter |
| Year |
2004 |
Publication  |
Recent Advances in Artificial Intelligence Research and Development |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
37-44 |
| Keywords |
MR; tagged MR; ASM; LV segmentation; motion estimation. |
| Abstract |
Tagged magnetic resonance is a very usefull and unique tool that provides a complete local and global knowledge of the left ventricle (LV) motion. In this article we introduce a method capable of tracking and segmenting the LV. Spectral methods are applied in order to obtain the so called HARP images which encode information about movement and are the base for LV point-tracking. For segmentation we use Active Shapes (ASM) that model LV shape variation in order to overcome possible local misplacements of the boundary. We finally show experiments on both synthetic and real data which appear to be very promising. |
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| Publisher |
IOS Press |
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Conference |
CCIA |
| Notes |
IAM;MILAB |
Approved |
no |
| Call Number |
IAM @ iam @ GRC2004 |
Serial |
1488 |
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| Author |
Debora Gil; Petia Radeva |
| Title |
Inhibition of False Landmarks |
Type |
Book Chapter |
| Year |
2004 |
Publication |
Recent Advances in Artificial Intelligence Research and Development |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
233-244 |
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| Abstract |
We argue that a corner detector should be based on the degree of continuity of the tangent vector to the image level sets, work on the image domain and need no assumptions on neither the image local structure nor the particular geometry of the corner/junction. An operator measuring the degree of differentiability of the projection matrix on the image gradient fulfills the above requirements. Its high sensitivity to changes in vector directions makes it suitable for landmark location in real images prone to need smoothing to reduce the impact of noise. Because using smoothing kernels leads to corner misplacement, we suggest an alternative fake response remover based on the receptive field inhibition of spurious details. The combination of both orientation discontinuity detection and noise inhibition produce our Inhibition Orientation Energy (IOE) landmark locator. |
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IOS Press |
Place of Publication |
Barcelona (Spain) |
Editor |
al, J.V. et |
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IAM;MILAB |
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no |
| Call Number |
IAM @ iam @ GiR2004a |
Serial |
1533 |
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| Author |
Fernando Vilariño; Debora Gil; Petia Radeva |
| Title |
A Novel FLDA Formulation for Numerical Stability Analysis |
Type |
Book Chapter |
| Year |
2004 |
Publication |
Recent Advances in Artificial Intelligence Research and Development |
Abbreviated Journal |
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| Volume |
113 |
Issue |
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Pages |
77-84 |
| Keywords |
Supervised Learning; Linear Discriminant Analysis; Numerical Stability; Computer Vision |
| Abstract |
Fisher Linear Discriminant Analysis (FLDA) is one of the most popular techniques used in classification applying dimensional reduction. The numerical scheme involves the inversion of the within-class scatter matrix, which makes FLDA potentially ill-conditioned when it becomes singular. In this paper we present a novel explicit formulation of FLDA in terms of the eccentricity ratio and eigenvector orientations of the within-class scatter matrix. An analysis of this function will characterize those situations where FLDA response is not reliable because of numerical instability. This can solve common situations of poor classification performance in computer vision. |
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IOS Press |
Place of Publication |
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Editor |
J. Vitrià, P. Radeva and I. Aguiló |
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ISBN |
978-1-58603-466-5 |
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| Notes |
MV;IAM;MILAB;SIAI |
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no |
| Call Number |
IAM @ iam @ VGR2004 |
Serial |
1663 |
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| Author |
David Masip; Jordi Vitria |
| Title |
Classifier Combination Applied to Real Time Face Detection and Classification. |
Type |
Book Chapter |
| Year |
2004 |
Publication |
Recerca Automatica, Visio i Robotica, Ed. UPC, A. Grau, V. Puig (Eds.), 345–353, ISBN 84–7653–844–8 |
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| Notes |
OR;MV |
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no |
| Call Number |
BCNPCL @ bcnpcl @ MBV2004b |
Serial |
449 |
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| Author |
Oriol Rodriguez-Leor; J. Mauri; Eduard Fernandez-Nofrerias; Antonio Tovar; Vicente del Valle; Aura Hernandez-Sabate; Debora Gil; Petia Radeva |
| Title |
Utilizacion de la estructura de los campos vectoriales para la deteccion de la Adventicia en imagenes de Ecografia Intracoronaria |
Type |
Journal |
| Year |
2004 |
Publication |
Revista Española de Cardiología |
Abbreviated Journal |
REC |
| Volume |
57 |
Issue |
2 |
Pages |
100 |
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| Notes |
MILAB;IAM |
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no |
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BCNPCL @ bcnpcl @ RMF2004 |
Serial |
566 |
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| Author |
Oriol Rodriguez-Leor; J. Mauri; Eduard Fernandez-Nofrerias; Antonio Tovar; Vicente del Valle; Aura Hernandez-Sabate; Debora Gil; Petia Radeva |
| Title |
Utilización de la Estructura de los Campos Vectoriales para la Detección de la Adventicia en Imágenes de Ecografía Intracoronaria |
Type |
Journal Article |
| Year |
2004 |
Publication |
Revista Internacional de Enfermedades Cardiovasculares Revista Española de Cardiología |
Abbreviated Journal |
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| Volume |
57 |
Issue |
2 |
Pages |
100 |
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| Notes |
IAM;MILAB |
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no |
| Call Number |
IAM @ iam @ RMF2004 |
Serial |
1642 |
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| Author |
David Masip; Jordi Vitria |
| Title |
Real Time Face Detection and Verification for Uncontrolled Environments |
Type |
Miscellaneous |
| Year |
2004 |
Publication |
Second COST 275 Workshop Biometrics on the Internet: Fundamentals, Advances and Applications, 55–58. |
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Vigo |
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OR;MV |
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no |
| Call Number |
BCNPCL @ bcnpcl @ MaV2004a |
Serial |
446 |
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| Author |
Zhong Jin; Franck Davoine; Zhen Lou |
| Title |
An Effective EM Algorithm for PCA Mixture Model |
Type |
Miscellaneous |
| Year |
2004 |
Publication |
Structural and Statistical Pattern Recognition, Lecture Notes in Computer Science, 3138:626–634 |
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Lisbon, Portugal |
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Approved |
no |
| Call Number |
Admin @ si @ JDL2004 |
Serial |
482 |
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| Author |
Oriol Ramos Terrades; Salvatore Tabbone; L. Wendling; Ernest Valveny |
| Title |
Symbol Recognition based on a Multiresolution Analysis of the Radon Transform |
Type |
Miscellaneous |
| Year |
2004 |
Publication |
The International Workshop on Multidisciplinary Image, Video, and Audio Retrieval and Mining |
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Pages |
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| Address |
Sherbrooke (Canada) |
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DAG |
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no |
| Call Number |
DAG @ dag @ RTW2004 |
Serial |
500 |
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