In this thesis, we proposed two frequency-based
watermarking algorithms. One is DCT-based method.
Embedding watermark in the multi-areas and multi-
frequency bands to ensure we can get a less
distorted watermark sequence under unintentional
circumstance. The other is DWT-based method. The
parent-children relationship and the feature of
bit-plane coding in the EZW algorithm are
exploited to embed watermark. It makes that we
can know the watermark exist or not in the
progressive transmission system. The experimental
results show that the proposed methods both can
resist unintentional attacks. The DWT-based
method also has a better progressive detection
capability.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0808100-141840 |
| Date | 08 August 2000 |
| Creators | Chang, Kai-Hsiang |
| Contributors | Shen-Fu Hsiao, Ing-Jer Huang, Chieh-Hsing Wu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808100-141840 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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