In this paper, we propose a high-efficient rendering method based on the backward ray-tracing technique to generate the annular sector elemental image array (ASEIA), which can form an ideal annular viewing zone for tabletop integral imaging 3D display. In the rendering process, different pixels in each annular sector elemental image are associated with different viewpoints by the backward rays in one rendering step. Therefore, the ASEIA can be obtained directly without capturing single-viewpoint images from all 360-degree directions, which improves rendering efficiency. Compared with the conventional ASEIA generation method, the rendering time is reduced and is independent of the viewpoint number. The experimental results show the feasibility of the proposed method.

中文翻译：

---

高效渲染生成环形扇形元素图像阵列，用于桌面一体化成像三维显示

在本文中，我们提出了一种基于后向光线追踪技术的高效渲染方法来生成环形扇形元素图像阵列（ASEIA），它可以为桌面整体成像3D显示形成理想的环形视区。在渲染过程中，每个环形扇形元素图像中的不同像素在一个渲染步骤中通过后向光线与不同的视点相关联。因此，无需从所有360度方向捕获单视点图像，即可直接获取ASEIA，从而提高渲染效率。与传统的ASEIA生成方法相比，渲染时间减少并且与视点数量无关。实验结果表明了所提出方法的可行性。