Optical multi-image encryption scheme based on discrete cosine transform and nonlinear fractional Mellin transform

详细信息    查看全文

• 作者：Shu Min Pan ; Ru Hong Wen ; Zhi Hong Zhou ; Nan Run Zhou
• 关键词：Multi ; image encryption ; Fractional Mellin transform ; Discrete cosine transform
• 刊名：Multimedia Tools and Applications
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：76
• 期：2
• 页码：2933-2953
• 全文大小：
• 刊物类别：Computer Science
• 刊物主题：Multimedia Information Systems; Computer Communication Networks; Data Structures, Cryptology and Information Theory; Special Purpose and Application-Based Systems;
• 出版者：Springer US
• ISSN：1573-7721
• 卷排序：76

文摘

A new multi-image encryption scheme with an optical implementation based on the nonlinear fractional Mellin transform is proposed, which could avoid the vulnerability of the linear encryption systems and encrypt multiple images simultaneously. In the proposed scheme, the original images are transformed into spectra by the discrete cosine transform, then the spectra are incised and spliced into a composite spectrum, and finally the composite spectrum is performed by the nonlinear fractional Mellin transform to obtain the final encrypted image. After the processing of the fractional Mellin transform, amplitude encoding and phase encoding are adopted. The orders of the fractional Mellin transform are the main keys of this multi-image encryption scheme. Simulation results demonstrate the validity and the security of the proposed scheme.