一种基于DWT和DCT的基于会话的多图像隐藏技术
A Session based Multiple Image Hiding Technique using DWT and DCT
AI总结：
本研究提出基于DWT和DCT的会话式多图像隐写技术，通过颜色平面分解、子带变换与伪随机序列嵌入秘密图像，兼具可接受的不可感知性与高安全性。
摘要：
本研究提出了一种基于离散小波变换（DWT）和离散余弦变换（DCT）的多图像彩色图像隐写技术。首先将载体图像分解为R、G、B三个独立的颜色平面，每个平面通过DWT分解为多个子带，再对各平面的HH分量施加DCT。利用伪随机序列和会话密钥，将秘密图像分散嵌入到选定的DCT系数中。提取秘密图像时，需对平面分解后的载密图像使用会话密钥并结合图像尺寸完成提取。实验表明，该方法生成的载密图像相较载体图像具有可接受的不可感知性和失真程度，整体安全性较高。
英文摘要：
This work proposes Steganographic technique for hiding multiple images in a color image based on DWT and DCT. The cover image is decomposed into three separate color planes namely R, G and B. Individual planes are decomposed into subbands using DWT. DCT is applied in HH component of each plane. Secret images are dispersed among the selected DCT coefficients using a pseudo random sequence and a Session key. Secret images are extracted using the session key and the size of the images from the planer decomposed stego image. In this approach the stego image generated is of acceptable level of imperceptibility and distortion compared to the cover image and the overall security is high.
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