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Please use this identifier to cite or link to this item: http://hdl.handle.net/2031/386

Title: Digital watermarking for image data
Authors: Hung, Hung Kwan
Department: Department of Computer Engineering and Information Technology
Issue Date: 2004
Supervisor: Dr. Feng Jian. Assessor: Dr. Chan K L
Abstract: In the past decades, the field of digital watermarking for copyright protection of different multimedia data has gained widespread popularity as research topics. Digital watermarking is a technique to embed some security messages into the multimedia data by slightly modifying the data. Those security messages can be text or image. In this project, the security analysis of different digital watermark embedding and extraction methods is firstly done. In most of the existing methods, it is found that even if we do not have correct key, the embedded content can be easily obtained. Traditionally, to solve this problem, some extra operations like bit relocation can be applied. However, this will introduce problems such as extra storage needed. We will focus on the scalar quantization based method and try to increase the robustness by increasing the number of lookup tables and interval decision.
Appears in Collections:Computer Engineering & Information Technology - Undergraduate Final Year Projects

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