Resultats globals: 20 registres trobats en 0.02 segons.
Articles, 19 registres trobats
Llibres i col·leccions, 1 registres trobats
Articles 19 registres trobats  1 - 10següent  anar al registre:
1.
22 p, 506.0 KB Contact geometry and isosystolic inequalities / Alvarez Paiva, Juan Carlos (Université de Lille. Laboratoire Paul Painlevé) ; Balacheff, Florent Nicolas (Université de Lille. Laboratoire Paul Painlevé)
A long-standing open problem asks whether a Riemannian metric on the real projective space with the same volume as the canonical metric carries a periodic geodesic whose length is at most π. A contact-geometric reformulation of systolic geometry and the use of canonical perturbation theory allow us to solve a parametric version of this problem: if g s is a smooth, constant-volume deformation of the canonical metric that is not formally trivial, the length of the shortest periodic geodesic of the metric g s attains π as a strict local maximum at s = 0. [...]
2014 - 10.1007/s00039-014-0250-2
Geometric and Functional Analysis, Vol. 24, Issue 2 (April 2014) , p. 648-669  
2.
17 p, 1.3 MB Hybrid Wavelet Transform Based Melanoma Identification Using Ensemble of Machine Learning Algorithms / Thepade, Sudeep D. (Pimpri Chinchwad College of Engineering-SPPU (Maharashtra, India). Computer Engineering Department) ; Ramnani, Gaurav (Pimpri Chinchwad College of Engineering-SPPU (Maharashtra, India). Computer Engineering Department) ; Mandhare, Shubham (Pimpri Chinchwad College of Engineering-SPPU (Maharashtra, India). Computer Engineering Department)
Traditional methods of disease diagnosis can be time-intensive, error prone and invasive to the subject. These methods are also prejudiced by the doctor's subjectivity. These issues can be resolved by using automated diagnosis methods. [...]
2020 - 10.5565/rev/elcvia.1236
ELCVIA : Electronic Letters on Computer Vision and Image Analysis, Vol. 19 Núm. 3 (2020) , p. 1-17 (Regular Issue)  
3.
40 p, 533.6 KB Weighted norm inequalities for generalized Fourier-type transforms and applications / Debernardi Pinos, Alberto (Bar-Ilan University (Ramat-Gan, Israel). Department of Mathematics)
We obtain necessary and sufficient conditions on weights for the generalized Fourier-type transforms to be bounded between weighted Lp-Lq spaces. As an important example, we investigate transforms with kernel of power type, as for instance the sine, Hankel, or Hα transforms. [...]
2020 - 10.5565/PUBLMAT6412001
Publicacions matemàtiques, Vol. 64 Núm. 1 (2020) , p. 3-42  
4.
18 p, 635.9 KB Compression of hyperspectral scenes through integer-to-integer spectral graph transforms+ / Tzamarias, Dion Eustathios Olivier (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Chow, Kevin (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Blanes Garcia, Ian (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Serra Sagristà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)
Hyperspectral images are depictions of scenes represented across many bands of the electromagnetic spectrum. The large size of these images as well as their unique structure requires the need for specialized data compression algorithms. [...]
2019 - 10.3390/rs11192290
Remote sensing (Basel), Vol. 11, issue 19 (Oct. 2019) , art. 2290  
5.
19 p, 1.8 MB Improved Statistically Based Retrievals via Spatial-Spectral Data Compression for IASI Data / García-Sobrino, Joaquín (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Laparra, Valero (Universitat de Valencia. Laboratori de Processament d'imatges) ; Serra Sagristà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Calbet, Xavier (AEMET) ; Camps Valls, Gustau (Universitat de Valencia. Laboratori de Processament d'imatges)
In this paper, we analyze the effect of spatial and spectral compression on the performance of statistically based retrieval. Although the quality of the information is not com- pletely preserved during the coding process, experiments reveal that a certain amount of compression may yield a positive impact on the accuracy of retrievals. [...]
2019 - 10.1109/TGRS.2019.2901396
IEEE transactions on geoscience and remote sensing, Vol. 57, Issue 8 (August 2019) , p. 5651 - 5668  
6.
11 p, 1.3 MB Statistical atmospheric parameter retrieval largely benefits from spatial-spectral image compression / García-Sobrino, Joaquín (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Serra Sagristà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Laparra, Valero (Universitat de Valencia. Laboratori de Processament d'imatges)
The infrared atmospheric sounding interferometer (IASI) is flying on board of the Metop satellite series, which is part of the EUMETSAT Polar System. Products obtained from IASI data represent a significant improvement in the accuracy and quality of the measurements used for meteorological models. [...]
2017 - 10.1109/TGRS.2016.2639099
IEEE transactions on geoscience and remote sensing, Vol. 55, issue 4 (April 2017) , p. 2213-2224  
7.
11 p, 3.7 MB DPCM-based edge prediction for lossless screen content coding in HEVC / Sánchez, Victor (University of Warwick. Department of Computer Science) ; Aulí Llinàs, Francesc (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Serra Sagristà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)
Screen content sequences are ubiquitous type of video data in numerous multimedia applications like video conferencing, remote education, and cloud gaming. These sequences are characterized for depicting a mix of computer generated graphics, text, and camera-captured material. [...]
2016 - 10.1109/JETCAS.2016.2606513
IEEE Journal on emerging and selected topics in circuits and systems, Vol. 6, issue 4 (Dec. 2016) , p. 497-507  
8.
13 p, 2.9 MB Piecewise mapping in HEVC lossless intra-prediction coding / Sánchez, Víctor (University of Warwick. Department of Computer Science) ; Aulí Llinàs, Francesc (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ; Serra Sagristà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)
The lossless intra-prediction coding modality of the High Efficiency Video Coding standard provides high coding performance while allowing frame-by-frame basis access to the coded data. This is of interest in many professional applications, such as medical imaging, automotive vision, and digital preservation in libraries and archives. [...]
2016 - 10.1109/TIP.2016.2571065
IEEE transactions on image processing, Vol. 25, issue 9 (Sep. 2016) , p. 4004-4017  
9.
20 p, 368.7 KB Mixed norm estimates for the Riesz transforms on SU (2) / Boggarapu, Pradeep (Indian Institute of Science. Department of Mathematics) ; Thangavelu, S. (Indian Institute of Science. Department of Mathematics)
In this paper we prove mixed norm estimates for Riesz transforms on the group SU(2). From these results vector valued inequalities for sequences of Riesz transforms associated to Jacobi differential operators of different types are deduced.
2016 - 10.5565/PUBLMAT_60116_06
Publicacions matemàtiques, Vol. 60 Núm. 1 (2016) , p. 171-190 (Survey)  
10.
20 p, 289.8 KB Why the Riesz transforms are averages of the dyadic shifts? / Petermichl, Stefanie (Institute for Advanced Studies (Princeton, Estats Units d'Amèrica)) ; Treil, S. (Brown University. Department of Mathematics) ; Volberg, A. (Michigan State University. Department of Mathematics)
The first author showed in [18] that the Hilbert transform lies in the closed convex hull of dyadic singular operators -so-called dyadic shifts. We show here that the same is true in any Rn -the Riesz transforms can be obtained as the results of averaging of dyadic shifts. [...]
2002 - 10.5565/PUBLMAT_Esco02_10
Publicacions matemàtiques, Vol. Extra (2002) , p. 209-228  

Articles : 19 registres trobats   1 - 10següent  anar al registre:
Llibres i col·leccions 1 registres trobats  
1.
9 p, 800.2 KB Saliency estimation using a non-parametric low-level vision model / Murray, Naila (Centre de Visió per Computador (Bellaterra, Catalunya)) ; Vanrell i Martorell, Maria Isabel (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ; Otazu Porter, Xavier (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ; Parraga, Carlos Alejandro (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
Many successful models for predicting attention in a scene involve three main steps: convolution with a set of filters, a center-surround mechanism and spatial pooling to construct a saliency map. However, integrating spatial information and justifying the choice of various parameter values remain open problems. [...]
Colorado Springs : IEEE, 2011 - 10.1109/CVPR.2011.5995506
IEEE Conference on Computer Vision and Pattern Recognition, CVPR, 2011, p. 433-440  

Us interessa rebre alertes sobre nous resultats d'aquesta cerca?
Definiu una alerta personal via correu electrònic o subscribiu-vos al canal RSS.