基于乘性噪声的图像人工退化研究

Artificial Image Degradation Based on Multiplicative Noise

图像人工退化即通过可逆的方式人为降低图像的视觉质量,主要应用于商用多媒体领域。本文提出了一种基于乘性噪声和混沌流密码的快速图像人工退化的算法,得到了此算法模型下图像退化程度的计算公式,分析了算法的安全性,并针对图像平均攻击算法提出了相应的改进算法。

Artificial image degradation is a reversible process to reduce the visual quality of the target image, which is useful in multimedia business. This article proposed a fast artificial image degradation algorithm based on muhiplicative noise, get the formula to calculate the degree of the degradation, and analyze the security of the algorithm, especially, we propose an improvement algorithm to defend the image averaging attack.