Digital Watermarking Menggunakan Metode Discrete Cosine Transform
| Main Author: | Winarso M.E., Sri |
|---|---|
| Format: | Article application/pdf |
| Bahasa: | ind |
| Terbitan: |
Fakultas Teknologi Informasi UKSW
, 2012
|
| Subjects: | |
| Online Access: |
http://repository.uksw.edu/handle/123456789/1018 |
Daftar Isi:
- Aiti : Jurnal Teknologi Informasi, Vol. 4, No. 1, Februari 2007, p. 72-85
- Due to good randomness and easy reproduction of chaos, the watermark is firstly permuted by the hashed chaotic sequence. Then a small number of reference points are randomly selected in the middle frequency bands of the DCT domain based on the chaotic sequences. After that, the batch-type of disorder watermark bits are embedded into the neighborhood of every reference point using odd-even quantization. The usefulness of multilevel chaotic keys and privacy of modification to frequency coefficients enhance the security of watermark information.