采用移频法进行离轴全息图压缩的研究  

A Method for Compressing Off-axis Digital Hologram with Spectrum Shifting

作　　者：李旭[1] 李勇[2] 

机构地区：[1]浙江警察学院实验中心,浙江杭州310053 [2]浙江师范大学信息光学研究所,浙江金华321004

出　　处：《激光与红外》2008年第8期856-859,共4页Laser & Infrared

基　　金：国家自然科学基金项目(No.60702078)资助

摘　　要：由于数字全息图的数据量庞大,其传输、存储占用大量的通信带宽和存储空间。为实现数字全息图有效的传输、存储,需要对其进行信息压缩。根据离轴全息图的频谱特点,提出了一种将数字全息图的有效信息从高频段搬移到低频段的方法,从而降低全息图采样频率达到信息压缩的目的。实验结果表明,该方法是有效的,压缩后全息图的再现像与原来的没有明显区别。Large amounts of communication bandwidth and memory space is occupied to transmit and store digital hologram on account of its enormous data volume. It is necessary to compress the information of digital hologram for effective transmittance and storage. A new method is proposed to compress the information, according to the spectrum character of off-axis hologram. The sampling frequency is reduced by shifting the useful information of digital hologram from high-frequency section to low-frequency section. Therefore, the information is compressed. The experimental results show the presented method is available.

关 键 词：数字全息图 信息压缩 数字全息显示 全息图信息量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]