Earticle

초록

영어

In this paper, a new oblivious fragile watermarking using discrete cosine transform is proposed. It is inspired by Wong's public key watermarking scheme proposed in 1998 and aims to improve its vulnerability towards possible attacks indicated by Barreto and Holliman. Instead of making use of contextual information and making it an inter-block dependent scheme, as suggested by Barreto, we adopt another approach to retain its blockwise independent property. Our scheme can avoid the conditions necessary for such attacks to be feasible. Furthermore, our scheme extracts the inherent image features and embeds them into this image as the watermark. This relieves users from having to maintain a database of watermarks from various sources. Experimental results show that the watermark insertion procedure has little effect on the visual quality of the watermarked image. They also show our scheme can locate the modifications made to the watermarked image, including image scaling, cropping, geometric distortion, pixel value changes, etc.

목차

Abstract
 1. Introduction
 2. Related theories
  2.1 Discrete Cosine Transform (DCT)
 3. The Proposed Scheme
  3.1 Watermark Insertion Procedure
  3.2 Watermark Extraction Procedure
 4. Experimental Results and Discussions
 5. Conclusions
 6. References

저자

• Chin-Chen Chang [ Feng Chia University Feng Chia University ]
• Henry Chou [ National Chung Cheng University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Signal Processing, Image Processing and Pattern Recognition

• 간기

  격월간

• pISSN

  2005-4254

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605