Watermaking citra digital dengan transformasi wavelet diskrit=Digital images watermarking with discrete wavelet transform

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2005
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/17931/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=706
• Institution: Universitas Gadjah Mada

At present digital data is used widely for all kind of applications. It is caused by the progress of digital technology. By the digital data can modified easily through all kinds of media especially internet. This ease can be used by the irresponsible party without regard to property right. Watermarking is a sufficient technique that promises for the proof of possession of digital data. In this research a technique of watermarking digital image using wavelet as transformation media (DWT) is developed. In this technique host image is transformed using wavelet into four frequenci areas LL, LH, HL and HH. To increase the robustness from JPEG compression attack, watermark bits are embedded to LH and HL areas. The experimental results using three wavelet families daubechies, symlets and coiflet showed that scale factor a has more effect over the type of wavelet. The results also showed that the watermarking technique presented here is robust to JPEG compression. Keywords : watermarking, wavelet, DWT, watermark, JPEG compression.