SCCG

In this survey, the problem of general type shape metamorphosis is considered as a typical space-time modeling operation. A new approach based on bounded blending of space-time half-cylinders is described. Detection and classification of critical points ...

Producing high quality animations featuring rich object appearance and compelling lighting effects is very time consuming using traditional frame-by-frame rendering systems. In this paper we present a number of global illumination and rendering ...

We describe a method for approximate parameterization of a planar algebraic curve by a rational Bézier (spline) curve. After briefly discussing exact methods for parameterization and methods for rational interpolation, we describe a new technique for ...

For the visualisation of time-dependent data sets, interactive isosurface extraction and rendering is desirable. It allows the user to study the development of a surface shape in time, such as a moving front or an evolving object shape. For this purpose,...

Frequency domain volume rendering (FVR) is a volume rendering technique with lower computational complexity as compared to other techniques. In this paper the FVR algorithm is accelerated by factor of 17 by mapping the rendering stage to the GPU. The ...

In many applications complex structured data have been used. Visualization of these data structures allows a user to get better insight both in the data structure and in the application itself. We present a visualization technique of structured data-...

A morphing or metamorphosis is a process of smoothly transforming one geometric object into another. This technique is mainly used in computer animation. Our work deals with genus 0 objects given in boundary representation. Most of existing techniques ...

Lines are usually drawn to mark the silhouette which distinct an object from another. From a simple stroke by the artist's hand, lines can be as expressive as though the drawn object is alive. Compared to the actual realistic rendering of the model, ...

Accurate facial animation is rapidly becoming a key feature in computer animation, from movie production to software agents. A lot of practical work in computer animation presently is done by 3ds max software. An advantage of this system is that one of ...

Several natural phenomena, such as mirages or the green flash, are owed to inhomogeneous media in which the index of refraction is not constant. This makes the light rays travel a curved path while going through those media. One way to simulate global ...

In precomputed radiance transfer (PRT), the radiance transfer operator is precomputed on vertices of a mesh. During rendering the transfer operator is combined with illumination to produce global illumination effects at real-time frame rates. However, ...

The classical virtual light sources algorithm enables us to reuse complete shooting paths at the cost of a single shadow ray per pixel, thus it can solve the rendering equation efficiently. This paper proposes two techniques to speed up this algorithm. ...

Light interaction is one of the most important factors in developing realistic plant models. Plants react to received illumination by bending branches, adapting their growth rate, orienting leaves and flowers, producing larger or smaller leaves, etc.

In ...

The polymerization of paint changes the optical properties of a surface, such as scattering, absorption, and their phase angle dependence. Such changes can be recorded through relative albedo from a viewpoint of time varying Bidirectional Reflectance ...

Multi-user virtual environments implemented across the web allow many users to interact with the virtual world and each other in a seamless manner. The current standard for embedding virtual worlds in the Internet, VRML 2.0, provides links between these ...

In this paper we present a novel interactive modeling system, called <i>VR Modeler,</i> to create 3D geometric models from a set of photographs. In our approach standard automatic reconstruction techniques are assisted by a human operator. The modeling ...

A better silhouette for a mesh can be rendered if we take into account the stability of edges inside and outside the current silhouette. Using the dot product between the normal and the viewing direction we can measure this stability. This gives us two ...

We present a simple and efficient representation to store and transmit connectivity data of view dependent meshes for out-of-core rendering of large datasets. Resident mesh data available for rendering is organized as vertex tree to support real-time ...

What we present in this paper is a 2D non-photorealistic, stroke-based image rendering technique, which is a fully automatic template-based painting method controlled by the structure of the model image. Namely it is based on dominant, weighted image ...

This paper presents a novel technique to convert raster images in a Scalable Vector Graphic (SVG) format using Data Dependent Triangulation (DDT). The triangulation, a classical 3D graphic rendering approach, is here applied to digital images acquired ...

We are developing a system that can synchronistically acquire laser range data and visual image data to build reality 3D models of urban environments. A major bottleneck in the process is automatically aligning all range scans into a common corrdinate ...

The process of <i>3D reconstruction,</i> or depth estimation, is a complex one, and many methods often have several parameters that may require fine tunning to adapt to the scene and improve reconstruction results. Usability of these methods is directly ...

The Taylor expansion has shown - in many fields - to be an extremely powerful tool. In this paper, we investigated image features and their relationships by analogy with Taylor expansion. The kind of expansion could be used to investigate positions of ...

Recently developed methods address the problem of denoising polygonal meshes derived from automatic scanning procedures. Nonlinear filtering is applied iteratively based on the estimated statistical properties of errors associated with the measured ...

The surface representation of 4D convex polyhedra is analysed. The criterion of the visibility is formulated.

This paper presents an algorithm for rendering and animation of 3D point-clouds using FPGA (Field Programmable Gate Array) chip coupled with a DSP (Digital Signal Processor). The point-clouds are sets of graphical data (particles) in 3D space suitable ...