Multilevel wavelet decomposition watermarking techniques
The merging of computer and communication technologies offers substantial new opportunities for processing and distribution of digital media. Along with powerful software and new devices such as digital cameras, scanners and printers, duplication, distribution, creation, and manipulation of images...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
Federation of Engineering Institutions of Islamic Countries
2006
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39428/ http://psasir.upm.edu.my/id/eprint/39428/1/39428.pdf |
| Summary: | The merging of computer and communication technologies offers substantial new opportunities for processing
and distribution of digital media. Along with powerful software and new devices such as digital cameras,
scanners and printers, duplication, distribution, creation, and manipulation of images can be easily and cheaply
done. The protection of ownership and the prevention of unauthorized tampering of images are becoming
increasingly important concerns to multimedia content owners especially when the content is to be made
available through the internet, which is unsecured. Digital watermarking is considered by many a potential
solution to this problem. It is a process which embeds some characteristics data in an image in advance which
later can be extracted that can be used for authentication or proof of ownership. This paper proposed a
combination of spread spectrum encoding of the embedded message and wavelet transform-based invariants for
digital image watermarking. Using the proposed method, we investigated the effect of using different values of
gain factor at different sub-band of decomposition in such a way that it will not affect the perceptual
transparency of the original image. The experimental results show that the imperceptibility and robustness are
guaranteed using the proposed technique. |
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