Browsing by Subject "Image processing"

Now showing items 1-20 of 477

    • 3D pose estimation using convolutional neural networks 

      Rubio Romano, Antonio (Universitat Politècnica de Catalunya, 2015-10)
      Master thesis
      Open Access
      The present Master Thesis describes a new Pose Estimation method based on Convolutional Neural Networks (CNN). This method divides the three-dimensional space in several regions and, given an input image, returns the ...

    • 3D reconstruction and recognition of objects using a kinect camera 

      Luján Rossell, Alba (Universitat Politècnica de Catalunya, 2016-09)
      Bachelor thesis
      Open Access
      Covenantee:   Technische Universität München
      This project is based on the recent advances of 3D depth cameras, one being the Microsoft Kinect sensors. Nowadays, this technology enables to create really accurate 3D figures and scenes simplifying difficult tasks in ...

    • 3D shape from multi-camera views by error projection minimization 

      Haro, Gloria; Pardàs Feliu, Montse (2010)
      Conference report
      Open Access
      Traditional shape from silhouette methods compute the 3D shape as the intersection of the back-projected silhouettes in the 3D space, the so called visual hull. However, silhouettes that have been obtained with background ...

    • 3D surface reconstruction in telepresence systems 

      Mora Ballestar, Laura (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Registering three-dimensional models is possible thanks to the use of multi view captures or the readings provided by depth sensors, which can be applied in Augmented or Virtual Reality systems. In this sense, this project ...

    • 4D Cardiac MRI Segmentation and Surface Reconstruction 

      Pons Moll, Gerard (Universitat Politècnica de Catalunya, 2008-10-10)
      Master thesis (pre-Bologna period)
      Open Access

    • 4D Cardiac Segmentation and Respiratory Motion Modeling of the Human Heart 

      Crosas Cano, Guillem (Universitat Politècnica de Catalunya, 2009-06)
      Master thesis (pre-Bologna period)
      Open Access
      Atrial Fibrillation (AF) is a growing problem in modern societies with an enormous impact in both short term quality of life and long term survival. A recently developed promising approach to cure AF uses radiofrequency ...

    • A compact 3D representation for multi-view video 

      Salvador Marcos, Jordi; Casas Pla, Josep Ramon (2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents a methodology for obtaining a 3D reconstruction of a dynamic scene in multi-camera settings. Our target is to derive a compact representation of the 3D scene which is effective and accurate, whatever ...

    • A comparative study between Elliptic Fourier and B-spline descriptors for object contour representation 

      Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç; Soria Pérez, José Antonio; Nasreddine, Kamal; Benzinou, Abdesslam (2014)
      Conference report
      Restricted access - publisher's policy
      In this work, a comparative study between Elliptic Fourier and B-spline descriptors is carried out for comparing their efficiency in characterizing the contour shape of image objects. In both cases, the goal is to obtain ...

    • A comparison of contrast enhancement methods for 2D radiographic images: Applied to patient positioning in proton therapy 

      Nespereira González, Alejandro (Universitat Politècnica de Catalunya, 2015-05-08)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Université Catholique de Louvain
      Different methods for radiographic image contrast enhancement are studied, implemented and compared. The efficiency of the techniques in improving image contrast is then evaluated both on a subjective evaluation from ...

    • A digital image processing method for urban scenes brightness assessment 

      López Besora, Judit; Isalgué Buxeda, Antonio; Coch Roura, Helena (Centre de Política de Sòl i Valoracions - Universitat Politècnica de Catalunya, 2016-10)
      Article
      Open Access
      The appearance of the city is strongly linked to many aspects such as climate, culture and sociological background. In cities with a prevalence of clear skies, one of the determining aspects is the climatic condition, which ...

    • A discrete labelling approach to attributed graph matching using SIFT features 

      Sanromà Güell, Gerard; Alquézar Mancho, René; Serratosa Casanelles, Francesc (2010)
      Conference report
      Open Access
      Local invariant feature extraction methods are widely used for image-features matching. There exist a number of approaches aimed at the refinement of the matches between image-features. It is a common strategy among these ...

    • A new otolith image contour descriptor based on partial reflection 

      Reig Bolano, Ramon; Marti Puig, Pere; Lombarte, A.; Soria Pérez, José Antonio; Parisi Baradad, Vicenç (2010-12)
      Article
      Restricted access - publisher's policy
      In this paper we propose a new contour descriptor for reconstructing fish otolith contours that uses half the number of coefficients needed by the classical elliptical Fourier descriptors (EFDs) for the same accuracy. ...

    • A scalable approach to T2-MRI colon segmentation 

      Orellana Bech, Bernat; Monclús Lahoya, Eva; Navazo Álvaro, Isabel; Brunet Crosa, Pere; Bendezú García, Álvaro; Azpiroz Vidaur, Fernando (2020-07-01)
      Article
      Restricted access - publisher's policy
      The study of the colonic volume is a procedure with strong relevance to gastroenterologists. Depending on the clinical protocols, the volume analysis has to be performed on MRI of the unprepared colon without contrast ...

    • A white-matter pathways extraction toolbox in Semantic Dementia 

      Montal Blancafort, Victor (Universitat Politècnica de Catalunya, 2015-05)
      Bachelor thesis
      Restricted access - author's decision
      [ANGLÈS] Neuroimaging techniques allow us to, processing Magnetic Resonance Imaging signals, understand the brain in a way we ever could image. With the tractorgaphy neuroimaging technique, we can extract the white-matter ...

    • Accelerating super-resolution for 4K upscaling 

      Pérez-Pellitero, Eduardo; Salvador, Jordi; Ruiz Hidalgo, Javier; Rosenhahn, Bodo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      This paper presents a fast Super-Resolution (SR) algorithm based on a selective patch processing. Motivated by the observation that some regions of images are smooth and unfocused and can be properly upscaled with fast ...

    • ACCHER Sistema de control de consumo de energías domésticas 

      Revilla Velarde, Luis (Universitat Politècnica de Catalunya, 2018-01)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Everis
      The name ACCHER comes from the abbreviations of the project's name (Automation of Consumption Control of Household Energy Resources). This project is carried out in collaboration with Everis (Company dedicated to consulting), ...

    • Accurate video object tracking using a region-based particle filter 

      Girbau Xalabarder, Andreu (Universitat Politècnica de Catalunya, 2017-02-06)
      Master thesis
      Open Access
      Usually, in particle filters applied to video tracking, a simple geometrical shape, typically an ellipse, is used in order to bound the object being tracked. Although it is a good tracker, it tends to a bad object ...

    • Action recognition using the Rf Transform on optical flow images 

      Carmona Leyva, José María; Climent Vilaró, Joan (SCITEPRESS, 2017)
      Conference report
      Open Access
      The objective of this paper is the automatic recognition of human actions in video sequences. The use of spatio-temporal features for action recognition has become very popular in recent literature Instead of extracting ...

    • Active mesh coding and rate-distortion theory 

      Salembier Clairon, Philippe Jean; Martí Navarro, Eva; Pardàs Feliu, Montse (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Conference lecture
      Open Access
      This paper presents a video coding scheme for very low bit rate applications. The coding approach relies on active meshes and can be viewed as a particular case of region-based coding. The active mesh is used to efficiently ...

    • Adaptive Filter Solution For Processing Lidar Returns: Optical Parameter Estimation 

      Rocadenbosch Burillo, Francisco; Vázquez Grau, Gregorio; Comerón Tejero, Adolfo (OPTICAL SOC AMER, 1998-01-31)
      Article
      Open Access
      Joint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point ...