The Collins Formula Applied in Optical Image Encryption

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（4）
• 页码范围: 73-76
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/4/044201

摘要

In recent years,a large number of optical and digital image encryption techniques have been proposed by researchers from different countries.[1-22] The double random phase encoding method was first proposed by Refregier and Javidi in 1995,and is effectively used in optical image encryption by changing the information into a noise-like picture.[1] The optical image encryption methods based on fractional Fourier transform (FRFT) and Fresnel transform have been presented since then.[3-8] The system parameters are added to be additional keys in the decryption in the above two methods to enhance security.Then,digital holography techniques were effectively used in encryption and decryption.[9] The concept of virtual optics was proposed and applied in image encoding,[10] and image encryption methods based on other optical systems with various methods were presented in these years.[11-15] Recently,a series of color information encryption and processing techniques has been proposed.[17-22] Some of these are based on tricolor theory by wavelength multiplexing,and some are based on the single channel encoding method and convert the color information using color systems.