A Blind Image Watermarking Scheme Based On Wavelet Tree Quantization

摘要：

This paper proposes a blind image watermarking scheme using wavelet trees quantization. The largest two coefficients in a wavelet tree are called significant coefficients and the difference between them is called significant difference. We embed a watermark bit by comparing the significant difference with an average significant difference value, and the maximum coefficients are quantized. So there exists a large magnitude difference between the maximum coefficients and the second maximum coefficients after watermark embedding, which can be used for blind extracting watermark. As a result, the watermarked image looks lossless comparing with the original image. Moreover, by designing an adaptive threshold in the extracting process, our method can effectively resist common image processing attacks such as JPEG compression, media filtering, Gaussian noise, cropping sharpening, histogram equalization and so on, and it has a good transparency.

关键词： watermark wavelet blind wartermark detection

作者: Peng Liu Zhizhong Ding

作者单位: Dept.of Communication Eng., School of Computer and Information Hefei University of Technology Hefei, China

会议类型: 国际会议

会议名称: Second International Symposium on Electronic Commerce and Security(第二届电子商务与安全国际研究大会)(ISECS 2009)

会议地点: 南昌

会议语种:英文

页码: 218-222

在线出版日期: 2009-05-22（万方平台首次上网日期，不代表论文的发表时间）