• A cost-effective approach for developing application-control GUIs for virtual environments 

      Andújar Gran, Carlos Antonio; Fairén González, Marta; Argelaguet Sanz, Fernando (2006-03)
      Comunicación de congreso
      Acceso abierto
      In this paper we present a new approach for fast development of application-control User Interfaces (UIs) for Virtual Environments (VEs). Our approach allows developers to build sophisticated UIs containing both simple ...
    • A critical analysis of human-subject experiments in virtual reality and 3D user interfaces 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere (Springer International Publishing, 2015)
      Capítulo de libro
      Acceso abierto
      This paper is about the major peculiarities and difficulties we encounter when trying to validate research results in fields such as virtual reality (VR) and 3D user interfaces (3DUI). We review the steps in the empirical ...
    • A multi-projector CAVE system with commodity hardware and gesture-based interaction 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Vinacua Pla, Álvaro; Vico Moya, Miguel Ángel; Díaz García, Jesús (2017-01-12)
      Report de investigación
      Acceso abierto
      Spatially-immersive systems such as CAVEs provide users with surrounding worlds by projecting 3D models on multiple screens around the viewer. Compared to alternative immersive systems such as HMDs, CAVE systems are a ...
    • A Parser-based tool to assist instructors in grading computer graphics assignments 

      Andújar Gran, Carlos Antonio; Vijulie, Cristina Raluca; Vinacua Pla, Álvaro (European Association for Computer Graphics (Eurographics), 2019)
      Texto en actas de congreso
      Acceso abierto
      Although online e-learning environments are increasingly used in university courses, manual assessment still dominates the way students are graded. Interactive judges providing a pass/fail verdict based on test sets are ...
    • A platform for developing and fine tuning adaptive 3D navigation techniques for the immersive web 

      Kamal, Ahmed; Andújar Gran, Carlos Antonio (Association for Computing Machinery (ACM), 2021)
      Texto en actas de congreso
      Acceso abierto
      Navigating through a virtual environment is one of the major user tasks in the 3D web. Although hundreds of interaction techniques have been proposed to navigate through 3D scenes in desktop, mobile and VR headset systems, ...
    • A query language for exploratory analysis of video-based tracking data in padel matches 

      Javadiha, Mohammadreza; Andújar Gran, Carlos Antonio; Lacasa Claver, Enrique (2023-01-01)
      Artículo
      Acceso abierto
      Recent advances in sensor technologies, in particular video-based human detection, object tracking and pose estimation, have opened new possibilities for the automatic or semi-automatic per-frame annotation of sport videos. ...
    • A survey of real-time crowd rendering 

      Beacco Porres, Alejandro; Pelechano Gómez, Núria; Andújar Gran, Carlos Antonio (2016-12)
      Artículo
      Acceso abierto
      In this survey we review, classify and compare existing approaches for real-time crowd rendering. We first overview character animation techniques, as they are highly tied to crowd rendering performance, and then we analyze ...
    • A Tool for N-way analysis of programming exercises 

      Andújar Gran, Carlos Antonio; Comino Trinidad, Marc; Fairén González, Marta; Vinacua Pla, Álvaro (European Association for Computer Graphics (Eurographics), 2020)
      Texto en actas de congreso
      Acceso abierto
      Programming exercises are a corner stone in Computer Science courses. If used properly, these exercises provide valuable feedback both to students and instructors. Unfortunately, the assessment of student submissions through ...
    • A topological comparison of surface extraction algorithms 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2021-10-22)
      Report de investigación
      Acceso abierto
      In many application areas, it is useful to convert the discrete information stored in the nodes of a regular grid into a continuous boundary model. Isosurface extraction algorithms differ on how the discrete information ...
    • A topological comparison of surface extraction algorithms 

      Andújar Gran, Carlos Antonio; Brunet Crosa, Pere; Fairén González, Marta; Navazo Álvaro, Isabel; Vinacua Pla, Álvaro (2006-01)
      Report de investigación
      Acceso abierto
      In many application areas, it is useful to convert the discrete information stored in the nodes of a regular grid into a continuous boundary model. Isosurface extraction algorithms di er on how the discrete information in ...
    • A virtual reality front-end for city modeling 

      Randó Segura, Eduard; Andújar Gran, Carlos Antonio; Patow, Gustavo Ariel (European Association for Computer Graphics (Eurographics), 2019)
      Comunicación de congreso
      Acceso abierto
      Current tools for city modeling, including those supporting procedural techniques, have a steep learning curve and require substantial user input and/or skills to create realistic 3D models of cities. In this paper we ...
    • Affordable immersive projection system for 3d interaction 

      Andújar Gran, Carlos Antonio; Fairén González, Marta; Brunet Crosa, Pere (SIACG, 2002)
      Texto en actas de congreso
      Acceso abierto
      This paper describes an affordable Virtual Reality system designed and developed by a group of researchers at the Polytechnic University of Catalunya (UPC). The system allows direct selection and manipulation of virtual ...
    • Alice 2.0: un visualizador interactivo de escenas 3D 

      Santisteve, Francisco Jose; Andújar Gran, Carlos Antonio; Brunet Crosa, Pere (1997-07)
      Report de investigación
      Acceso abierto
      This work describes the main features of a 3D visualizer called ALICE. This navigator has been developed over the Motif and OpenGL libraries by the Graphics Section of the L.S.I. departament in UPC. ALICE provides ...
    • Alice : un visualizador para entornos virtuales 

      Andújar Gran, Carlos Antonio; Burguera Domínguez, Javier (1994)
      Report de investigación
      Acceso abierto
    • An annotation tool for digital restoration of wall paintings 

      Barreiro Díaz, Albert; Muñoz Pandiella, Imanol; Bosch Geli, Carles; Andújar Gran, Carlos Antonio (European Association for Computer Graphics (Eurographics), 2022)
      Comunicación de congreso
      Acceso abierto
      Antique paintings are essential to study and understand our past. Paintings, and specifically mural paintings, are delicate artworks that are affected by multiple deterioration conditions. Weathering and human interventions ...
    • Animation fidelity in self-avatars: impact on user performance and sense of agency 

      Yun, Haoran; Pontón Martínez, José Luis; Andújar Gran, Carlos Antonio; Pelechano Gómez, Núria (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Texto en actas de congreso
      Acceso abierto
      The use of self-avatars is gaining popularity thanks to affordable VR headsets. Unfortunately, mainstream VR devices often use a small number of trackers and provide low-accuracy animations. Previous studies have shown ...
    • Anisomorphic ray-casting manipulation for interacting with 2D GUIs 

      Andújar Gran, Carlos Antonio; Argelaguet Sanz, Fernando (2007-01)
      Artículo
      Acceso abierto
      The accommodation of conventional 2D GUIs with virtual environments (VEs) can greatly enhance the possibilities of many VE applications. In this paper we present a variation of the well-known ray-casting technique for fast ...
    • Automated digital color restitution of mural paintings using minimal art historian input 

      Muñoz Pandiella, Imanol; Andújar Gran, Carlos Antonio; Cayuela Vellido, Begonya; Pueyo Sandez, Francesc Xavier; Bosch Geli, Carles (Elsevier, 2023-08)
      Artículo
      Acceso abierto
      Digital color restitution aims to digitally restore the original colors of a painting. Existing image editing applications can be used for this purpose, but they require a select-and-edit workflow and thus they do not scale ...
    • Automatic generation of multiresolution boundary representations 

      Andújar Gran, Carlos Antonio; Ayala Vallespí, M. Dolors; Brunet Crosa, Pere; Joan Arinyo, Robert; Solé Bosquet, Jaume (1996-01)
      Report de investigación
      Acceso abierto
      The paper focuses on automatic simplification algorithms for the generation of a multiresolution family of solid models from an initial boundary representation of a polyhedral solid. An algorithm for general polyhedra ...
    • Automatic speed graph generation for predefined camera paths 

      Argelaguet Sanz, Fernando; Andújar Gran, Carlos Antonio (Springer Verlag, 2009)
      Texto en actas de congreso
      Acceso restringido por política de la editorial
      Predefined camera paths are a valuable tool for the exploration of complex virtual environments. The speed at which the virtual camera travels along different path segments is key for allowing users to perceive and ...