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Point cloud is a basic description of discrete shape information. Parameterization of unorganized points is important for shape analysis and shape reconstruction of natural objects. In this paper we present a new algorithm for global parameterization of an unorganized point cloud and its application to the meshing of the cloud. Our method is guided by(More)
This paper develops a method to analyze and compute the lines of curvature and their differential geometry defined on implicit surfaces. With our technique, we can explicitly obtain the analytic formulae of the associated geometric attributes of an implicit surface, e.g. torsion of a line of curvature and Gaussian curvature. Additionally, it can be used to(More)
Modeling and rendering of large forest scenes are a challenging task, whose geometric complexity surpasses even the capabilities of current graphics hardware. A tree model simplification tool is developed in this paper to automatically generate both hybrid polygon/image-based tree models for close distance viewing and cross billboards for far distance(More)
Foliage modeling and rendering is an important topic in virtual environment. Texture mapping and foliage simplification are usual solutions to forest navigation keeping leaf realism and with a fast speed. These two techniques are still used separately, so that their common advantages are not unified. A new technique is presented in this paper on a smooth(More)
A variety of methods have been developed to produce quad meshes of high quality; however, there are still limitations in those state-of-the-art algorithms. First, there is little consideration in the symmetry of a mesh shape, which is important for further use of the quad mesh, such as UV layout. Second, most of current methods are time consuming for large(More)
In this paper, we present an integrated framework with easy and effective techniques to generate new motions of a character in real-time, using only a short segment of motion data. In this framework, a sequence of segment copies are strung together and then smoothed by a transition method at a junction of two consecutive segments. We use IK thought for the(More)
Stylized silhouette is a powerful tool for non-photorealistic rendering. It can be used to simulate different materials and drawing techniques. In this paper, we present a simple technique to improve the existing stylized silhouette algorithms in two aspects. First, a new shading algorithm is developed to render the surface of a model. It improves the(More)
In this paper, we propose a generative recurrent model for human-character interaction. Our model is an encoder-recurrent-decoder network. The recurrent network is composed by multiple layers of long short-term memory (LSTM) and is incorporated with an encoder network and a decoder network before and after the recurrent network. With the proposed model, the(More)
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