Low Luminance Smooth Blocks Based Watermarking Scheme in DCT Domain

摘要：

In this paper, we present a new watermarking algorithm based on low luminance smooth blocks in compressed DCT domain. The blocks are selected by sorting the 8×8 DCT blocks according to the value of DC coefficients and the variance of AC coefficients respectively. The watermark is embedded in these blocks, in which the value of DC and variance of the AC are both small. This scheme depends on shifting the sign of a subset of low-frequency coefficients according to the corresponding watermark information. The watermark extraction can be performed without resorting to original image. Experimental results show that the watermarked images look visually identical to the original, and the watermarks also successfully survive after image processing operations such as image cropping, scaling, filtering and JPEG compression.

作者: ZHOU Haitao QI Chun GAO Xiaochuan

作者单位: Institute of Image Processing & Recognition Xian Jiaotong University Xian710049，Shaanxi, China

会议类型: 国际会议

会议名称: 2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

会议地点: 广西桂林

会议语种:英文

页码: 19-23

在线出版日期: 2006-06-25（万方平台首次上网日期，不代表论文的发表时间）