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| Author |
Partha Pratim Roy; Umapada Pal; Josep Llados |
| Title |
Morphology Based Handwritten Line Segmentation using Foreground and Background Information |
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Conference Article |
| Year |
2008 |
Publication |
International Conference on Frontiers in Handwriting Recognition, |
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241–246 |
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Montreal (Canada) |
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ICFHR |
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DAG @ dag @ RPL2008a |
Serial |
1050 |
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| Author |
T. Widemann; Xavier Otazu |
| Title |
Titanias radius and an upper limit on its atmosphere from the September 8, 2001 stellar occultation |
Type |
Journal Article |
| Year |
2009 |
Publication |
International Journal of Solar System Studies |
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| Volume |
199 |
Issue |
2 |
Pages |
458–476 |
| Keywords |
Occultations; Uranus, satellites; Satellites, shapes; Satellites, dynamics; Ices; Satellites, atmospheres |
| Abstract |
On September 8, 2001 around 2 h UT, the largest uranian moon, Titania, occulted Hipparcos star 106829 (alias SAO 164538, a V=7.2, K0 III star). This was the first-ever observed occultation by this satellite, a rare event as Titania subtends only 0.11 arcsec on the sky. The star's unusual brightness allowed many observers, both amateurs or professionals, to monitor this unique event, providing fifty-seven occultations chords over three continents, all reported here. Selecting the best 27 occultation chords, and assuming a circular limb, we derive Titania's radius: View the MathML source (1-σ error bar). This implies a density of View the MathML source using the value View the MathML source derived by Taylor [Taylor, D.B., 1998. Astron. Astrophys. 330, 362–374]. We do not detect any significant difference between equatorial and polar radii, in the limit View the MathML source, in agreement with Voyager limb image retrieval during the 1986 flyby. Titania's offset with respect to the DE405 + URA027 (based on GUST86 theory) ephemeris is derived: ΔαTcos(δT)=−108±13 mas and ΔδT=−62±7 mas (ICRF J2000.0 system). Most of this offset is attributable to a Uranus' barycentric offset with respect to DE405, that we estimate to be: View the MathML source and ΔδU=−85±25 mas at the moment of occultation. This offset is confirmed by another Titania stellar occultation observed on August 1st, 2003, which provides an offset of ΔαTcos(δT)=−127±20 mas and ΔδT=−97±13 mas for the satellite. The combined ingress and egress data do not show any significant hint for atmospheric refraction, allowing us to set surface pressure limits at the level of 10–20 nbar. More specifically, we find an upper limit of 13 nbar (1-σ level) at 70 K and 17 nbar at 80 K, for a putative isothermal CO2 atmosphere. We also provide an upper limit of 8 nbar for a possible CH4 atmosphere, and 22 nbar for pure N2, again at the 1-σ level. We finally constrain the stellar size using the time-resolved star disappearance and reappearance at ingress and egress. We find an angular diameter of 0.54±0.03 mas (corresponding to View the MathML source projected at Titania). With a distance of 170±25 parsecs, this corresponds to a radius of 9.8±0.2 solar radii for HIP 106829, typical of a K0 III giant. |
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0019-1035 |
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CAT @ cat @ Wid2009 |
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1052 |
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| Author |
Alfons Juan-Ciscar; Gemma Sanchez |
| Title |
PRIS 2008. Pattern Recognition in Information Systems. Proceedings of the 8th international Workshop on Pattern Recognition in Information systems – PRIS 2008, in conjunction with ICEIS 2008 |
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Book Whole |
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2008 |
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Barcelona (Spain) |
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DAG @ dag @ JuS2008 |
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1054 |
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| Author |
Xavier Otazu; Maria Vanrell; C. Alejandro Parraga |
| Title |
Colour induction effects are modelled by a low-level multiresolution wavelet framework |
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2008 |
Publication |
Perception 37(Suppl.): 107 |
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CAT @ cat @ OVP2008b |
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1055 |
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| Author |
Hugo Berti; Angel Sappa; Osvaldo Agamennoni |
| Title |
Improved Dynamic Window Approach by Using Lyapunov Stability Criteria |
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Journal |
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2008 |
Publication |
Latin American Applied Research |
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38 |
Issue |
4 |
Pages |
289–298 |
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ADAS @ adas @ BSA2008 |
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1056 |
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| Author |
Fadi Dornaika; Angel Sappa |
| Title |
Real Time Image Registration for Planar Structure and 3D Sensor Pose Estimation |
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Book Chapter |
| Year |
2008 |
Publication |
Stereo Vision |
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18 |
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299–316 |
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Editor |
Asim Bhatti |
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no |
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ADAS @ adas @ DoS2008c |
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1057 |
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| Author |
Jaume Garcia; Debora Gil; Sandra Pujades; Francesc Carreras |
| Title |
A Variational Framework for Assessment of the Left Ventricle Motion |
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Journal Article |
| Year |
2008 |
Publication |
International Journal Mathematical Modelling of Natural Phenomena |
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3 |
Issue |
6 |
Pages |
76-100 |
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Key words: Left Ventricle Dynamics, Ventricular Torsion, Tagged Magnetic Resonance, Motion Tracking, Variational Framework, Gabor Transform. |
| Abstract |
Impairment of left ventricular contractility due to cardiovascular diseases is reflected in left ventricle (LV) motion patterns. An abnormal change of torsion or long axis shortening LV values can help with the diagnosis and follow-up of LV dysfunction. Tagged Magnetic Resonance (TMR) is a widely spread medical imaging modality that allows estimation of the myocardial tissue local deformation. In this work, we introduce a novel variational framework for extracting the left ventricle dynamics from TMR sequences. A bi-dimensional representation space of TMR images given by Gabor filter banks is defined. Tracking of the phases of the Gabor response is combined using a variational framework which regularizes the deformation field just at areas where the Gabor amplitude drops, while restoring the underlying motion otherwise. The clinical applicability of the proposed method is illustrated by extracting normality models of the ventricular torsion from 19 healthy subjects. |
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IAM |
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IAM @ iam @ GGC2008a |
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1058 |
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| Author |
Marçal Rusiñol; Josep Llados |
| Title |
Word and Symbol Spotting using Spatial Organization of Local Descriptors |
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Conference Article |
| Year |
2008 |
Publication |
Proceedings of the 8th IAPR International Workshop on Document Analysis Systems, |
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Pages |
489–496 |
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Nara (Japan) |
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DAG @ dag @ RuL2008b |
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1059 |
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| Author |
Mathieu Nicolas Delalandre; Ernest Valveny; Josep Llados |
| Title |
Performance Evaluation of Symbol Recognition and Spotting Systems |
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Conference Article |
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2008 |
Publication |
Proceedings of the 8th International Workshop on Document Analysis Systems, |
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497–505 |
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Nara (Japan) |
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DAG @ dag @ DVL2008b |
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1060 |
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| Author |
Joan Mas; Jose Antonio Rodriguez; Dimosthenis Karatzas; Gemma Sanchez; Josep Llados |
| Title |
HistoSketch: A Semi-Automatic Annotation Tool for Archival Documents |
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Conference Article |
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2008 |
Publication |
Proceedings of the 8th International Workshop on Document Analysis Systems, |
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517–524 |
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Nara (Japan) |
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no |
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DAG @ dag @ MRK2008a |
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1061 |
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Dimosthenis Karatzas |
| Title |
Detecting Gradients in Text Images Using the Hough Transform |
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Conference Article |
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2008 |
Publication |
Proceedings of the 8th International Workshop on Document Analysis Systems, |
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245–252 |
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Nara (Japan) |
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DAG @ dag @ Kar2008 |
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1062 |
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Ernest Valveny; Miquel Ferrer |
| Title |
Application of Graph Embedding to Solve Graph Matchin Problems |
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Conference Article |
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2008 |
Publication |
Colloque International Francophone sur l’Ecrit et le Document |
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13–18 |
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Rouen (France) |
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CIFED’08 |
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DAG @ dag @ VaF2008 |
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1063 |
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| Author |
Miquel Ferrer; Ernest Valveny; F. Serratosa; K. Riesen; Horst Bunke |
| Title |
An Approximate Algorith for Median Graph Computation using Graph Embedding |
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Conference Article |
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2008 |
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19th International Conference on Pattern Recognition. |
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Tampa, USA |
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ICPR |
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DAG |
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no |
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DAG @ dag @ FVS2008a |
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1064 |
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Dimosthenis Karatzas; Marçal Rusiñol; Coen Antens; Miquel Ferrer |
| Title |
Segmentation Robust to the Vignette Effect for Machine Vision Systems |
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Conference Article |
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2008 |
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19th International Conference on Pattern Recognition |
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The vignette effect (radial fall-off) is commonly encountered in images obtained through certain image acquisition setups and can seriously hinder automatic analysis processes. In this paper we present a fast and efficient method for dealing with vignetting in the context of object segmentation in an existing industrial inspection setup. The vignette effect is modelled here as a circular, non-linear gradient. The method estimates the gradient parameters and employs them to perform segmentation. Segmentation results on a variety of images indicate that the presented method is able to successfully tackle the vignette effect. |
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Tampa, USA |
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ICPR |
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DAG @ dag @ KRA2008 |
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1065 |
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Jose Antonio Rodriguez; Florent Perronnin |
| Title |
Local Gradient Histogram Features for Word Spotting in Unconstrained Handwritten Documents |
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Conference Article |
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2008 |
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International Conference on Frontiers in Handwriting Recognition |
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7–12 |
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Montreal (Canada) |
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ICFHR |
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Admin @ si @ RoP2008b |
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1066 |
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