【摘要】 给出了应用混沌和小波理论实现图像加密的一种方案。该方案对于互联网上大量的图片,应用小波的多尺度特性对图像进行分解,依据人类视觉特性,留取其近似部分(即低频部分)去掉其细节(即高频部分)。为减少信道传输量,又对分解后留下的低频部分进行小波阈值压缩,最后应用混沌方程生成的混沌序列,对经过分解压缩的图像进行加密。该方案保密性强,信道传输量低。更多还原

【Abstract】 In this paper, a scheme of implementing image encryption using chaotic and wavelet theory is proposed. Based on visual masking effect of human visual system, it keeps the approximate parts (e.g. low-frequency parts) and omits the details (e.g. high-frequency parts). In order to minimize the channel transmission amount, the low-frequency remained parts are compressed by wavelet threshold. At last, the scheme encrypts the images using chaotic sequence generated through chaotic equation. The scheme has high quality of secrecy and low channel transmission amount.更多还原