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A model for real time ocean breaking waves animation

A model for real time ocean breaking waves animation

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作者： De Lima, Diogo Strube Braun, Henry Musse, Soraia Raupp Graduate Programme in Computer Science PUCRS Av. Ipiranga 6681 Porto Alegre/RS Brazil

ISBN: (纸本)9780769543598

This paper presents a procedural model for ocean breaking waves in real time. Since the growth of digital games, more ocean, coast and beach scenarios have appeared, but these games rarely use breaking waves. The model proposed in this paper aims to animate waves with minimal graphic processing unit (GPU) and computer processing unit (CPU) costs. Using a few set of parameters, our procedural model generates an unique ocean-like scenario. This model could be employed in several types of games and applications. Results indicate that our real time breaking waves are visually accepted and have minimal impact on application performance. © 2010 IEEE.

关键词： Animation

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Generation of cartoon 2D cracks based on leaf venation patterns

Generation of cartoon 2D cracks based on leaf venation patte...

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作者： Couto, Julia M. Colleoni Marcelino, Tiago Braun, Henry De Lima, Diogo Strube Musse, Soraia Raupp Graduate Programme in Computer Science PUCRS Av. Ipiranga 6681 Porto Alegre RS Brazil

ISBN: (纸本)9780769543598

This paper presents a model for generating 2D cracks in real-time for application in games and cartoon animations. Cracks are generated based on a method previously used for leaf venation patterns. We describe a procedural model to generate cracks that can be customized for application in games, generating different visual results depending on interactive parameters. Results were visually evaluated by users and indicate that hypothesis to adopt leaf venation patterns to generate cracks is valid and possible for interactive applications. © 2010 IEEE.

关键词： Cracks

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A Model For Real Time Ocean Breaking Waves Animation

A Model For Real Time Ocean Breaking Waves Animation

引用

Brazilian Symposium on Games and Digital Entertainment

作者： Diogo Strube de Lima Henry Braun Soraia Raupp Musse Graduate Programme in Computer Science - PUCRS

ISBN: (纸本)9781612843919

关键词： Procedural modeling Shader Breaking Waves Real Time

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Generation of Cartoon 2D Cracks Based on Leaf Venation Patterns

Generation of Cartoon 2D Cracks Based on Leaf Venation Patte...

引用

Brazilian Symposium on Games and Digital Entertainment

作者： Julia M. Colleoni Couto Tiago Marcelino Henry Braun Diogo Strube de Lima Soraia Raupp Musse Graduate Programme in Computer Science PUCRS

ISBN: (纸本)9781612843919

关键词： Leaf venation Crack patterns

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Automatic detection of 2D human postures based on single images

Automatic detection of 2D human postures based on single ima...

引用

24th SIBGRAPI Conference on Graphics, Patterns and Images

作者： Souto Jr., Humberto Musse, Soraia Raupp Pontifícia Universidade Católica Do Rio Grande Do sul - PUCRS Graduate Programme in Computer Science Virtual Human Laboratory Porto Alegre Brazil

ISBN: (纸本)9780769545486

Estimating human pose in static images is a challenging task due to the high dimensional state space, presence of image clutter and ambiguities of image observations. In this paper we propose a method to automatically detect human poses in a single image, based on a 2D model combined with anthropometric data. Furthermore, we use artificial neural networks to detect high level information about the human posture. Experimental results showed that the proposed technique performs well in non trivial images. © 2011 IEEE.

关键词： Neural networks

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Eyes and eyebrows detection for performance driven animation

Eyes and eyebrows detection for performance driven animation

引用

23rd SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2010

作者： Moreira, Juliano L. Braun, Adriana Musse, Soraia R. Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS Graduate Programme in Computer Science Virtual Human Laboratory Porto Alegre Brazil

ISBN: (纸本)9780769542300

Real-time localization of eyes and eyebrows in video sequences can find several applications in nowadays. However, this task is still a challenge, mainly if we consider images of low quality as those achieved by web cams. This paper describes a methodology to accurately detect meaningful feature points in eyes and eyebrows of people in frontal pose, in images captured by web cams. Also it discusses the mapping of the movement of the eyes of a real person to an avatar, in order to provide Performance Driven Animation (PDA). Furthermore, this paper presents obtained results and the limitations of the proposed methodology. © 2010 IEEE.

关键词： computer vision

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Generating facial ground truth with synthetic faces

Generating facial ground truth with synthetic faces

引用

23rd SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2010

作者： Queiroz, Rossana Cohen, Marcelo Moreira, Juliano L. Braun, Adriana Jacques Jr., Júlio C. Musse, Soraia Raupp Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS Graduate Programme in Computer Science Virtual Human Laboratory Porto Alegre Brazil

ISBN: (纸本)9780769542300

This work describes a methodology for generation of facial ground truth with synthetic faces. Our focus is to provide a way to generate accurate data for the evaluation of computer Vision algorithms, in terms of facial detection and its components. Such algorithms play a key role in face detection. We present a prototype in which we can generate facial animation videos using a 3D face models database, controlling face actions, illumination conditions and camera position. The facial animation platform allows us to generate animations with speech, facial expressions and eye motion, in order to approach realistic human face behavior. In addition, our model provides the ground truth of a set of facial feature points at each frame. As result, we are able to build a video database of synthetic human faces with ground truth, which can be used for training/evaluation of several algorithms for tracking and/or detection. We also present experiments using our generated videos to evaluate face, eye and mouth detection algorithms, comparing their performance with real video sequences. © 2010 IEEE.

关键词： Face recognition

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Procedural hair generation

Procedural hair generation

引用

8th Brazilian Symposium on Games and Digital Entertainment, SBGAMES2009

作者： Cassol, Vinícius Jurinic Marson, Fernando Pinho Musse, Soraia Raupp Graduate Programme in Computer Science Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS Av. Ipiranga 6681 Porto Alegre RS Brazil

ISBN: (纸本)9780769539638

This paper presents a hair generation technique for cartoon and Anime characters. The main goal of this work is to provide a procedural generation technique, robust enough in order to create different types of hairs. We propose a parametric model that can produce diversity of obtained results through parameters variation. The model is organized in three steps: firstly, the strands generation, followed by positioning them in the head of the characters. Finally, the third step is responsible for providing cartoon rendering, including common characteristics in cartoon shading, as the black edges and solid colors. Visual inspection of obtained results indicate that generated hairs are coherent with expected in terms of visual aspects. © 2009 IEEE.

关键词： Cartoon Hair Hair Generation Procedural Modeling Hair procedural model Visual aspects Anime parameter variation

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Simulation of autonomous agents using terrain reasoning

Simulation of autonomous agents using terrain reasoning

引用

12th IASTED International Conference on computer Graphics and Imaging, CGIM 2011

作者： Cassol, Vinícius J. Marson, Fernando P. Vendramini, Mateus Paravisi, Marcelo Musse, Soraia R. Bicho, Alessandro L. Jung, Cláudio R. Graduate Programme in Computer Science PUCRS Porto Alegre - RS Brazil Center of Computational Sciences FURG Rio Grande - RS Brazil Institute of Informatics UFRGS Porto Alegre - RS Brazil

ISBN: (纸本)9780889868656

The representation of a real scenario through a 3D virtual environment populated by autonomous agents has several applications, such as games or animation movies. Such representation can be a difficult and complex task, since natural scenarios are composed by forms with a lot of details that should be reproduced realistically in the virtual world. Moreover, virtual people should understand and consider the virtual world for navigation similarly to real people. In this paper we describe a model to provide motion of groups of characters based on terrain reasoning in 3D virtual worlds. The model starts with the terrain generation process using height maps in a pseudo-infinite world, followed by the simulation of characters movement generated through an space colonization algorithm. Finally, the visualization of characters motion in the 3D terrain can be produced.

关键词： Autonomous agents

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VhCVE: A collaborative virtual environment including facial animation and computer vision

VhCVE: A collaborative virtual environment including facial ...

引用

8th Brazilian Symposium on Games and Digital Entertainment, SBGAMES2009

作者： Braun, Henry Hocevar, Rafael Queiroz, Rossana B. Cohen, Marcelo Moreira, Juliano Lucas Jacques Jr., Julio C. Braun, Adriana Musse, Soraia R. Samadani, Ramin Graduate Programme of Computer Science PUCRS Av Ipiranga 6681 Porto Alegre RS Brazil Hewlett Packard Laboratories 1501 Page Mill Rd. Palo Alto CA United States

ISBN: (纸本)9780769539638

In this paper we present a platform called VhCVE, in which relevant issues related to Collaborative Virtual Environments applications are integrated. The main goal is to provide a framework where participants can interact with others by voice and chat. Also, manipulation tools such as a mouse using computer Vision and Physics are included, as well as rendering techniques (e.g. light sources, shadows and weather effects). In addition, avatar animation in terms of face and body motion are provided. Results indicate that our platform can be used as a interactive virtual world to help communication among people. © 2009 IEEE.

关键词： Animation

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