【摘要】 屏幕空间环境遮挡算法通过半球采样模拟计算出遮挡因子,实现环境遮挡计算的实时性,近似模拟出全局光照的效果,为解决采样中样本量过大的问题,提出降低分辨率采样的方法,该采样算法可以根据某一区域的深度信息判定为光滑区域还是边缘区域,随后的采样过程中仅对边缘区域进行,在物体的光照效果没有减弱的基础上,节省空间和时间消耗,提高渲染的速度。对于已采样样本,提出利用加速插值方法处理样本点,使得样本点的分布具有针对性,可以去除阴影感过深的问题。实验表明,以上两种改进使得渲染的效率提高同时更符合真实感的渲染要求。更多还原

【Abstract】 Screen-space ambient occlusion algorithm achieves real-time rendering speed and simulates global illumination effects. In order to solve the problem that the sample size is too large, proposes a method of reducing the sampling rate. The sampling algorithm can be judged the smooth areas and edge areas according to the depth information. Only the edge areas need to be sampled. This method saves space and time consumption. For the sampled samples, proposes to use the accelerated interpolation sample points, which can remove the deep shadow and more correspond real rendering requirements.更多还原