Fast computer generated hologram calculation with a mini look-up table incorporated with radial symmetric interpolation
Fast computer generated hologram calculation with a mini look-up table incorporated with radial symmetric interpolation
复制标题
使用结合径向对称插值的迷你查找表进行快速计算机生成的全息图计算
DOI：
10.1364/oe.25.000112
复制
发表时间：
2017-01-09
期刊：
影响因子：
3.8
通讯作者：
Zou, Wenbin
中科院分区：
文献类型：
--
作者：
Jiao, Shuming;Zhuang, Zhaoyong;Zou, Wenbin
计算全息（CGH）的计算量可以通过预计算查找表来显著减少。然而，查找表的巨大内存使用是一个重大挑战。为了解决这个问题，查找表可以有效地压缩的方法，如径向对称插值。针对径向对称插值法的查找表中仍存在数据冗余的问题，提出了一种基于主成分分析（PCA）的微型查找表方法，可以将查找表的大小进一步压缩到原来的5%~ 10%甚至更小。该方案中的压缩查找表仅占用200-300 KB的内存，而且与传统方法相比，几乎不会带来计算速度下降和重建图像质量下降的额外代价。(C)2017美国光学学会
The amount of heavy computation in Computer Generated Hologram (CGH) can be significantly reduced by pre-computing look-up tables. However, the huge memory usage of look-up tables is a major challenge. To address this problem, the Look-up tables can be efficiently compressed by methods such as radial symmetric interpolation. In this paper, we notice that there is still data redundancy in the look-up table of radial symmetric interpolation method and the table size can be further compressed to 5%-10% or even less of original, by our proposed mini look-up table approach based on Principal Component Analysis (PCA). The compressed look-up table in our scheme only occupies a memory size of around 200-300 KB or even less. Moreover, the proposed scheme will introduce almost no extra cost of computation speed slowdown and reconstructed image quality degradation, compared to conventional method. (C) 2017 Optical Society of America