基于GPU和角正交投影视图的多视角投影全息图  

Multiple viewpoints projection hologram from multiple angular orthogonal projection images based on GPU

作　　者：曹雪梅 张春晓[1] 管明祥[1] 夏林中[1] 郭丽丽[1] 苗玉虎 曹士平 CAO Xuemei;ZHANG Chunxiao;GUAN Mingxiang;XIA Linzhong;GUO Lili;MIAO Yuhu;CAO Shiping(School of Information and Communication,Shenzhen Institute of Information Technology,Shenzhen 518172,Guangdong Province,P.R.China;Konka Group Co.Ltd.,Shenzhen 518057,Guangdong Province,P.R.China)

机构地区：[1]深圳信息职业技术学院信息与通信学院,广东深圳518172 [2]康佳集团股份有限公司,广东深圳518057

出　　处：《深圳大学学报（理工版）》2024年第5期536-541,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(12103016);深圳市基础研究计划资助项目(JCYJ20190808093001772);广东省普通高校青年创新基金资助项目(2020KQNCX206);广东省基础与应用基础研究资助项目(2022B1515120002);深圳市科技计划-技术攻关资助项目(JSGG20211029095003004);广东省教育厅高校科研平台资助项目(2020KTSCX301);广东省普通高校特色创新资助项目(2021KTSCX279);深圳信息职业技术学院校级科研资助项目(SZIIT2022KJ040)。

摘　　要：针对多视角投影全息图生成速度慢的问题,提出一种基于计算机图形处理单元(graphics processing unit,GPU)的多视角投影计算全息图合成方法.获取多个角正交投影视图,充分利用GPU强大的并行计算能力,同时计算多幅投影视图对全息图的作用,即在计算过程中同时将沿着投影方向移位后的一系列角正交投影视图乘以其相应的常数相位因子.其中,每个投影图像的投影角决定了其移位的距离和常数相位因子.将所有并行计算结果累加,可以得到一个包含物体三维信息的二维复矩阵,即菲涅尔全息图.相较于使用计算机中央处理器(central processing unit,CPU)进行计算,本方法显著提升了计算速度,将计算效率提高了30~40倍,为多视角投影全息图的高效生成提供一种可行途径.To solve the problem of slow generation of multiple viewpoint projection hologram,a novel method for synthesizing Fresnel holograms based on graphics processing unit(GPU)is proposed with multiple angular orthogonal projection images.Firstly,multiple angular orthogonal projection images are obtained.Subsequently,the contribution of each angular orthogonal projection image to the hologram is calculated by using the powerful parallel computing function of the GPU.Specifically,in the computation process,the angular orthogonal projection image is multiplied by its corresponding constant phase factor after each angular orthogonal projection image is shifted along its projection direction.The shift distance and constant phase factor are determined by the projection angle.Finally,by accumulating all parallel computation results,a two-dimensional complex matrix containing three-dimensional object information is obtained.Compared to computations using a central processing unit(CPU),the proposed method demonstrates a significant speed improvement,achieving a computational efficiency increase of 30~40 times,which provides a feasible solution for efficiently generating multi-view projection holograms.

关 键 词：信息处理技术 计算全息 全息显示 图形处理单元 角正交投影视图 多视角投影全息 

分 类 号：TN26[电子电信—物理电子学]