采用视角切片法提高全息体视图再现视差图像分辨率  

A Novel Perspective Slice Method to Improve Resolution of Reconstruction Parallax Image in Holographic Stereogram

作　　者：裴闯[1,2] 蒋晓瑜[1] 闫兴鹏[1] 赵锴[1] 程长青[1] 

机构地区：[1]装甲兵工程学院信息工程系 [2]中国人民解放军61135部队

出　　处：《激光与光电子学进展》2015年第9期98-103,共6页Laser & Optoelectronics Progress

基　　金：全国优秀博士学位论文作者专项资金资助项目(201432);北京市自然科学基金(4152049);北京市科技新星计划

摘　　要：针对利用液晶空间光调制器再现全视差计算全息体视图的过程中,再现视差图像分辨率较低的问题,提出了一种视角切片法。设定全息体视图平面与观察平面之间的距离为有限远,全息体视图上每一个全息单元由再现一个点变成再现一定宽度的视角切片。设定了视差图像、视角切片与全息单元频谱之间的对应关系,根据观察距离与全息单元尺寸计算了对应的视角切片宽度。基于液晶空间光调制器进行了全息体视图的再现实验,结果表明,视角切片法能够将再现视差图像的分辨率提高8倍,清晰地再现视差图像的细节特征。并分析了再现距离对视角切片法全息体视图再现质量的影响。A novel perspective slice method is proposed to solve the low resolution problem in reconstruction parallax images of holographic stereogram. The distance between holographic stereogram plane and viewing plane is set to be finite. A perspective slice is reconstructed by a holographic element （hogel）, which is only a point in traditional holographic stereogram. The relationships between parallax image, perspective slice and the spectra of hogels are designed. The width of perspective slice is calculated from viewing distance and the size of bogels. The holographic stereogram with perspective slice is reconstructed by optical system based on a spatial light modulator （SLM）. The experimental results demonstrate that the proposed method can enhance the resolution of the reconstruction parallax image by 8 times and represent the details of objects effectively. The influences of reconstruction distance to the quality of parallax images are analyzed.

关 键 词：全息 三维显示 全息体视图 视角切片 

分 类 号：O438.1[机械工程—光学工程]