3/03 speaker:
本週邀請到 逢甲大學講座
張真誠講座教授於1982年獲得國立交通大學計算機工程博士學位
張教授擔任過多國學術機構授與之名譽教授、顧問教授、特聘教授、
由於在研究上的卓越貢獻,張教授於1998年當選為國際電子電機
機會難得,敬請踴躍出席。
講題與摘要如下:
Title:
A Self-Reference Watermarking Scheme based on Wet Paper Coding
Abstract:
Fragile watermarking is applied to protect the integrity of the digital media. Current fragile watermarking schemes mainly provide the functionality of detecting and locating the tampered regions of an authorized image. The capability to recover the tampered regions has rarely been discussed in the literature. In fact, the recovery ability is an important issue while proving and maintaining the image integrity. For achieving these purposes, we first utilize the concept of self-reference to preserve the significant information of a protected image. Then we embed the information into the protected image using the technique of wet paper coding. According to experimental results, the new scheme is highly sensitive to detect and locate the tampered area. In particular, the results show that the quality of recovery image is satisfactory.
Keywords: Fragile watermarking, authentication, recovery, vector quantization, wet paper coding