Improvements on a simple muscle-based 3D face for realistic facial expressions

Facial expressions play an important role in face-to-face communication. With the development of personal computers capable of rendering high quality graphics, computer facial animation has produced more and more realistic facial expressions to enrich human-computer communication. In this paper, we present a simple muscle-based 3D face model that can produce realistic facial expressions in real time. We extend Waters' (1987) muscle model to generate bulges and wrinkles and to improve the combination of multiple muscle actions. In addition, we present techniques to reduce the computation burden on the muscle mode

Designing and Animating a Character Sprite with Modern Techniques

High-quality 2D animation for video game production is both strenuous and time consuming. Traditionally, 2D game animation consisted of drawing each frame by hand and processing it into a bitmap for use in-game. As every frame was individually drawn, it was difficult to create enough drawings for smooth animation as well as keep form consistent between frames. Although, this technique usually resulted in a strong sense of 3D volume and realism when well executed. Current technology allows for faster 2D animation workflows using interpolation and bone systems as well as greater consistency, smoothness, and efficiency, but oftentimes the results lose the sense of depth and quality found in traditional animation. This thesis explores efficiently creating, and animating a 2D sprite by utilizing a composite of traditional animation techniques and computer animation practices. Using Adobe Photoshop, Adobe Flash, and the Unity3D game engine, a short game was created to demonstrate this process in a finished work

Edutainment in cartography

Edutainment is a mixture of education and entertainment. In the software industry edutainment was very popular in the 80’s and the first part of the 90’s when the graphic capabilities of PC-s were very limited. The early computer games were based on textual information. From the second part of the 80’s low resolution pictures became a part of a computer game, but that was still quite far from the so called multimedia. As the CPUs and graphic cards became more powerful computer games started to develop rapidly. Nowadays the 3D, the virtual reality, the real time animation and the high quality sound are the essential parts of computer games. The computer games in edutainment are nearly totally disappeared. In the last some years the internet games turned to be more popular: the relatively low bandwidth and the lack of web multimedia standards gave new opportunities for the edutainment in this environment. Cartography can profit form this revival because maps are very popular content of the web

A deformation transformer for real-time cloth animation

Achieving interactive performance in cloth animation has significant implications in computer games and other interactive graphics applications. Although much progress has been made, it is still much desired to have real-time high-quality results that well preserve dynamic folds and wrinkles. In this paper, we introduce a hybrid method for real-time cloth animation. It relies on datadriven models to capture the relationship between cloth deformations at two resolutions. Such data-driven models are responsible for transforming low-quality simulated deformations at the low resolution into high-resolution cloth deformations with dynamically introduced fine details. Our data-driven transformation is trained using rotation invariant quantities extracted from the cloth models, and is independent of the simulation technique chosen for the lower resolution model. We have also developed a fast collision detection and handling scheme based on dynamically transformed bounding volumes. All the components in our algorithm can be efficiently implemented on programmable graphics hardware to achieve an overall real-time performance on high-resolution cloth models. © 2010 ACM.postprin

A survey of real-time crowd rendering

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 the state of the art in crowd rendering. We discuss different representations for level-of-detail (LoD) rendering of animated characters, including polygon-based, point-based, and image-based techniques, and review different criteria for runtime LoD selection. Besides LoD approaches, we review classic acceleration schemes, such as frustum culling and occlusion culling, and describe how they can be adapted to handle crowds of animated characters. We also discuss specific acceleration techniques for crowd rendering, such as primitive pseudo-instancing, palette skinning, and dynamic key-pose caching, which benefit from current graphics hardware. We also address other factors affecting performance and realism of crowds such as lighting, shadowing, clothing and variability. Finally we provide an exhaustive comparison of the most relevant approaches in the field.Peer ReviewedPostprint (author's final draft

Smoothness perception : investigation of beat rate effect on frame rate perception

Despite the complexity of the Human Visual System (HVS), research over the last few decades has highlighted a number of its limitations. These limitations can be exploited in computer graphics to significantly reduce computational cost and thus required rendering time, without a viewer perceiving any difference in resultant image quality. Furthermore, cross-modal interaction between different modalities, such as the influence of audio on visual perception, has also been shown as significant both in psychology and computer graphics. In this paper we investigate the effect of beat rate on temporal visual perception, i.e. frame rate perception. For the visual quality and perception evaluation, a series of psychophysical experiments was conducted and the data analysed. The results indicate that beat rates in some cases do affect temporal visual perception and that certain beat rates can be used in order to reduce the amount of rendering required to achieve a perceptual high quality. This is another step towards a comprehensive understanding of auditory-visual cross-modal interaction and could be potentially used in high-fidelity interactive multi-sensory virtual environments