移动平台复杂光照下皮肤绘制系统

发布时间：2018-01-09 04:13

本文关键词：移动平台复杂光照下皮肤绘制系统　出处：《浙江大学》2017年硕士论文　论文类型：学位论文

【摘要】：光在自然界传播时,由于物理规律以及不同物质具有不同的折射率散射率等光学特性,就会产生丰富多彩的视觉效果,比如阴影、表面高光、环境光遮挡以及一些材质的半透明效果等。在真实感绘制领域,人们通过各种绘制算法绘制这些效果产生逼真的画面从而为用户提供更为丰富的感官体验。然而,人体皮肤作为一种特殊材质,由于其复杂的生理结构,光在其表面和内部的真实传播过程异常复杂,难以通过计算机进行准确模拟,这就导致皮肤的真实感绘制一直是绘制领域中比较有挑战性的工作。近几年,随着硬件设备的快速发展,PC上各种不同的皮肤绘制算法不断涌现,并且不少算法已经广泛的应用到游戏和电影等图形绘制领域。但是随着移动设备井喷式增长,人们对移动端的高质量游戏和沉浸式虚拟现实体验需求显著增加,然而由于移动平台计算能力有限,实时进行复杂光照下的真实感皮肤绘制非常困难。如何在移动端进行复杂光照下皮肤的实时绘制,就是本篇论文所要解决的问题。本文首先设计了一个高质量的移动平台绘制框架,能够充分利用移动设备上现代图形处理设备的高级特性。在框架上实现了当前最先进的光照算法,实现了动态光源下皮肤的实时绘制方法和基于预计算的复杂环境光下皮肤实时绘制方法,从而完成了一个移动平台复杂光照下人体皮肤实时绘制系统。
[Abstract]:When light propagates in nature, because of the physical law and the different optical properties such as different refractive index scattering rate, it will produce rich and colorful visual effects, such as shadow, surface highlight. Ambient light occlusion and translucent effects of some materials. In the field of realistic rendering. People use a variety of rendering algorithms to produce realistic images to provide users with a richer sensory experience. However, human skin as a special material, due to its complex physiological structure. The real propagation process of light on its surface and inside is very complicated, and it is difficult to simulate accurately by computer, which leads to the realistic rendering of skin has been a challenging task in the field of rendering in recent years. With the rapid development of hardware devices, a variety of different skin rendering algorithms are emerging on PC. And many algorithms have been widely used in the field of graphics rendering, such as games and movies. But with the growth of mobile devices blowout, the demand for high-quality mobile games and immersive virtual reality experience has increased significantly. However, due to the limited computing power of mobile platform, it is very difficult to real-time realistic skin rendering under complex illumination. This paper first designs a high-quality rendering framework for mobile platform. It can make full use of the advanced features of modern graphics processing devices on mobile devices and implement the most advanced illumination algorithm on the frame. The real-time rendering method of skin under dynamic light source and the real-time rendering method of skin under complex environment based on prediction are implemented, and a real-time rendering system of human skin under complex illumination on mobile platform is completed.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.41

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