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The defense date of the thesis is 2004-08-29
The current date is 2019-03-24
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URN etd-0829104-115109 Statistics This thesis had been viewed 1863 times. Download 11 times. Author Bin-Yuan Huang Author's Email Address No Public. Department Computer Science and Enginerring Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 107 Title A Copyright Protection Scheme for Gray-Level Images Based on Image Secret Sharing and Wavelet Transformation Keyword watermark copyright protection discrete wavelet transformation image secret sharing image secret sharing discrete wavelet transformation copyright protection watermark Abstract A copyright protection scheme for gray-level images based on image secret sharing and wavelet transformation is proposed in this thesis. The scheme contains a secret image generation phase and a watermark retrieval phase. In the generation phase, the scheme extracts the features from a host image using the discrete wavelet transformation (DWT), and then uses the features and the watermark, a visually recognizable pattern, to generate the secret image using the image secret sharing (ISS). In the retrieval phase, the watermark is retrieved by combining the secret image and the features obtained from the suspect image. The retrieved watermark is then compared with the original watermark for checking copyright.
The experimental results show that the scheme can withstand 11 kinds of common image processing operations, including JPEG compression, varied noise adding, uniform noise adding, blurring, sharpening, averaging, brightness adjustment, contrast adjustment, scaling, cropping, and equalization.
Advisor Committee Shang-Lin Hsieh - advisor
none - co-chair
none - co-chair
Files Date of Defense 2004-07-26 Date of Submission 2004-08-29