摘要
主要研究基于DCT频域的信息隐藏技术.提出了一种新的基于DCT频域的隐藏策略,在保证强壮性及图像质素的前提下,提高信息隐藏量,降低误码率并提高透明性.实验结果显示此信息隐藏策略对抵抗JPEG失真压缩亦具有强韧性.
Basically, information is hidden by means of spatial field and transformed field. The former is unpractical due to its weak robustness despite its large volume, and the latter is robust and practical but with poor volume for information. This article presents a new hiding strategy based on DCT （Discrete Cosine Transform） transformed field to increase both the volume and transparency and reduce BER （ bit error rate） at the same time on the premise that the robustness and graphic quality of the stego cover are guaranteed. The experimental result shows the proposed strategy of steganography is also effective against the JPEG lossy compression.
出处
《华南师范大学学报（自然科学版）》
CAS
2008年第3期53-59,共7页
Journal of South China Normal University(Natural Science Edition)
关键词
信息隐藏
隐写术
离散余弦变换
information hiding
steganography
discrete cosine transform
