MSF Seminar 11
Paper reading: [Authentication and recovery of an image by sharing and lattice-embedding, JEI 2010]
- When?
- Monday 6 February 2012, 16:00 to 17:00
- Where?
- 39 BB 02
- Open to:
- Public, Staff, Students
- Speaker:
- Miss Hui Wang
This is the last MSF group seminar we scheduled for the last semester, which was originally planned on 30th Jan but postponed to 6th Feb. After this seminar we will have a the new series of our group seminars for the new semester. This time Miss Hui Wang will report her study on a recent paper related to her research on semi-fragile watermarking for self-restoration.
Sian-Jheng Lin and Ja-Chen Lin, "Authentication and recovery of an image by sharing and lattice-embedding," Journal of Electronic Imaging, 19(4):043008, 2010
Abstract of the paper: Based on sharing and lattice-embedding techniques, we present an authentication-recovery method for an image. The recovery data are shared among many shadows, then lattice-embedding is utilized to embed each shadow in the discrete cosine transform domain of an 8×8 block. The proposed method can resist certain content-preserving operations such as JPEG compression, Gaussian noise, and brightness adjustment, up to a tolerance level controlled by a quantization parameter value. The method can also resist certain security attacks such as a cut-and-paste attack, a collage attack, and a vector quantization attack. Compared with previous works, the proposed method has following major advantages and novelty: (1) the method does not require prediction of the tampering trace, and the tampered blocks are always recovered as long as the number of valid blocks reaches a threshold and (2) lattice-embedding yields smaller distortion than does parity-check quantization, and the latter was often used in reported works.
