种基于Henon映射的图像置乱及恢复方法

• Format: Patent
• Language: Chinese
• Published: 13.03.2018
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

本发明公开了种基于Henon映射的图像置乱及恢复方法，该方法包括图像置乱和图像恢复两个过程，利用Henon映射的迭代实现图像的置乱，利用Henon映射的逆变换的迭代实现置乱图像的恢复。本发明中原始图像通过Henon映射最少迭代2次即能达到满意的置乱程度，实现了图像的快速置乱；同时从置乱状态逆向迭代相同的步数便能很快恢复出原图像。此外，本方法抗攻击能力强，能抵抗定的剪切、噪声的攻击，且恢复图像的可读性不受影响。 The invention discloses an image scrambling and restoring method based on Henon mapping. The method includes the image scrambling process and the image restoring process, image scrambling is achieved through iteration of Henon mapping, and image restoration is achieved through iteration of inverse transformation of Henon mapping. According to the method, original images are iterated at least twice through Henon mapping and then can reach the satisfactory scrambling degree, and fast image scrambling is achieved; meanwhile, the original images can be fast restored through the steps with the number same as iteration of inverse iteration from the scrambling state. Besides, the method is high in attack resistance, resistant to a certain degree of attack of shearing and noise, and readability of the restored ima