【摘要】 全局光照的计算是真实感绘制的重要部分,基于点的全局光照算法(PBGI)是一种高效的全局光照计算方法,虽然该方法绘制质量有偏,但以其快速高效、无噪声而被广泛地应用于影视动漫行业.文中总结了PBGI相关工作,并将其分为更复杂的绘制效果、基于点的绘制优化、基于众核的加速优化和PBGI存储优化4类方法进行对比分析;进一步地,从绘制速度、绘制质量、算法并行度、绘制场景规模和算法实验难度5个方面对上述4类PBGI方法进行对比分析;最后指出该方法目前面临的问题和挑战,为后期的研究提供思路.更多还原

【Abstract】 Global illumination is very significant in realistic rendering. Point based global illumination(PBGI) can produce high quality and noise free rendering results efficiently. It was widely used in movie production and film industry, though it is biased. In this survey, we review the recent work about PBGI, and summarize the four aspects: more complex rendering effects, point-based rendering, many-core acceleration, and PBGI storage. In this paper, the above-mentioned four kinds of PBGI methods are compared and analyzed from five aspects: speed,quality, many core parallelism, scalability and implementation. The goal of our paper is to give the readers a comprehensive overview of PBGI and to facilitate further research to address the limitations of existing approaches.更多还原