Distributions of the DCT Coefficient for Watermark Detection

摘要：

In this paper, we derive the distribution of the DCT coefficients for a fixed block variance, and invoke the central limit theorem to show that this is approximately Gaussian. Then, by allowing the block variance to have a statistical distribution itself, we analyze when the DCT coefficients would follow a Laplacian distribution. Such knowledge would be useful, for instance, in quantizer design, information hiding capacity and Watermark Detection.

关键词： DCT coefficient Laplacian distribution information hiding capacity

作者: DU Yao Gang Chen Ying Wang Li Feng Yuan Zheng

作者单位: Beijing Electronic Science and Technology Institute Beijing, P.R.China

会议类型: 国际会议

会议名称: The 2010 International Conference on Computer Application and System Modeling(2010计算机应用与系统建模国际会议 ICCASM 2010)

会议地点: 太原

会议语种:英文

页码: 96-98

在线出版日期: 2010-10-22（万方平台首次上网日期，不代表论文的发表时间）