Title :
A Fragile Watermarking with Authentication and Post-Compression for Digital Camera
Author :
Wang, Chuen-Ching ; Chang, Yao-Tang ; Chi, Ming-Jun
Author_Institution :
Dept. of Electron. Eng., Nat. Changhua Univ. of Educ., Changhua
Abstract :
In this paper we propose a novel fragile watermarking for digital camera named compression-watermarking algorithm (CWA). It bases on modifying the last non-zero coefficient of DCT quantized-block in JPEG image. The proposed algorithm not only can provide the authentication ability but also can increase the compression ratio of the JPEG compressed domain image. Therefore, the CWA can be applied in the DCT-based domain application to provide authentication and bit rate reduction.
Keywords :
data compression; discrete cosine transforms; image coding; image sensors; watermarking; DCT quantized-block; JPEG image; authentication methods; bit rate reduction; compression-watermarking algorithm; digital camera; fragile watermarking; Authentication; Bit rate; Change detection algorithms; Digital cameras; Digital images; Discrete cosine transforms; Frequency; Image coding; Transform coding; Watermarking;
Conference_Titel :
Innovative Computing Information and Control, 2008. ICICIC '08. 3rd International Conference on
Conference_Location :
Dalian, Liaoning
Print_ISBN :
978-0-7695-3161-8
Electronic_ISBN :
978-0-7695-3161-8
DOI :
10.1109/ICICIC.2008.31
