Moller Christian N, Travis Adrian R L
Photonics and Sensors Group, Engineering Department, Cambridge University, Cambridge CB2 1PZ, UK.
IEEE Trans Vis Comput Graph. 2005 Mar-Apr;11(2):228-36. doi: 10.1109/TVCG.2005.28.
An image presented on an autostereoscopic system should not contain discontinuities between adjacent views. A viewer should experience a continuous scene when moving from one view to the next. If corresponding points in two perspectives do not spatially abut, a viewer will experience jumps in the scene. This is known as interperspective aliasing. Interperspective aliasing is caused by object features far away from the stereoscopic screen being too small, which results in visual artifacts. By modeling a 3D point as a defocused image point, we can adapt Fourier analysis to devise a depth-dependent filter kernel that allows filtering of a stereoscopic 3D image. For synthetic 3D data, we use a simpler approach, which is to smear the data by a distance proportional to its depth.
自动立体显示系统呈现的图像在相邻视图之间不应存在不连续性。观看者在从一个视图切换到下一个视图时应体验到连续的场景。如果两个视角中的对应点在空间上不邻接，观看者将在场景中体验到跳跃。这被称为视角间混叠。视角间混叠是由远离立体屏幕的物体特征过小导致的，这会产生视觉伪像。通过将三维点建模为散焦图像点，我们可以采用傅里叶分析来设计一个与深度相关的滤波内核，从而对立体三维图像进行滤波。对于合成三维数据，我们采用一种更简单的方法，即按与深度成比例的距离对数据进行模糊处理。
