A Blind Watermarking Algorithm Research Based on Fast DCT

摘要：

　　This article exploits a fast algorithm to watermark implant and extract,which first transform N×N(N=2(*)) two dimension DCT into one dimension DCT with N numbers of points.And then the adopted algorithm implants watermark using matrix decomposition and masterly adjusting interrelation of DCT coefficients,thus to make the visual distortion to be minima after a watermark being implanted in the image,in addition,this method is a blind approach.The results indicate that the algorithm enjoy high image reducing property and robustness to several common attacks when ensuring invisibility of watermark.Finally,it is also superior to R-C,index-mapping like matrix cut algorithms and can also improve calculating speed,which make it possible to apply for image protection.

关键词： fast DCT 2D-DCT copyright protection DCT modulus

作者: Siyu Lai Juan Wang

作者单位: Department of Medical Imaging North Sichuan Medical College NanChong, China College of Computer Science China West Normal University NanChong, China

会议类型: 国际会议

会议名称: 2012 2nd International Conference on Computer and Information Applications(ICCIA2012)(2012第二届计算机和信息应用国际会议)

会议地点: 太原

会议语种:英文

页码: 1589-1591

在线出版日期: 2012-12-08（万方平台首次上网日期，不代表论文的发表时间）