Digital image active camouflage scheme based on fractal

Abstract

The invention provides a digital image active camouflage scheme based on fractal, comprising two main phases of adaptive camouflage and original image restoration. In the adaptive camouflage phase, fractal camouflage from an object to a background is realized by utilizing fractal mapping based on color similarity, and an original image is converted into another meaningful image to realize object adaptive camouflage. In the original image restoration phase, an authorized user first losslessly extracts target zone boundary chain codes and fractal parameter codes and approximately recovers an original color images through proper fractal iteration. The invention fully combines fractal self-similarity and image color characteristics, realizes full combination between the object and the background, has good camouflage effects, and can be used for guiding military object camouflage in the military field. The digital image active camouflage scheme has good security, and only an authorized user with a correct secret key can effectively recover an original image; in addition, the scheme is low in computing cost, and can be better applied to network environment visual media anonymous communication.

Description

technical field [0001] The invention relates to a fractal-based active camouflage scheme for digital images, and belongs to the technical field of multimedia information security and military camouflage. Background technique [0002] Traditional encryption technology applies appropriate mathematical transformations to convert important plaintext information into meaningless ciphertext, preventing illegal users from understanding the original data, thereby ensuring data confidentiality. It is precisely because of the noise-like characteristics of the encrypted ciphertext that it is easy to arouse the suspicion of the attacker, leaving clues for the attacker to intercept the confidential information [1, 2] (document [1]: Liu Lepeng, Zhang Xuefeng. Based on chaos and Image encryption algorithm based on bit operation[J]. Computer Application, 2013, 33(4): 1070-1073,1099; Literature [2]: Wang Lina, Zhang Huanguo, Ye Dengpan, Hu Donghui. Information Hiding Technology and Applicati...

AI Technical Summary

Problems solved by technology

However, the current digital camouflage schemes use the main color of the background to replace the color of the target area to design the camouflage, and cannot restore the camouflage image from the camouflage image to the original target, so it is difficult to apply to the digital media covert communication in the network environment [5, 6] 5]: Hengfu Yang, Jianping Yin. An adaptive digital camouflage scheme using visual perception and K-mean clustering [C]. In Proceedings of the 3rd / 2013 International Conference on Materials and Products Manufacturing Technology (MPMT 2013), Changsha, China, September 25-26, 2013; Literature [6]: Jiang Yuzhen, Zhu Yinghui. Camouflage imitation based on palette analysis and error diffusion dithering[J]. Computer Engineering and Application, 2013, 49(4): 181-184.)

Images