A Copyright Protection Scheme for Color Images Using Secret Sharing and Wavelet Transformation

• Main Authors: Lung-Yao Hsu, 許瓏耀
• Other Authors: Shang-Lin Hsieh
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/42607559822150481332

碩士 === 大同大學 === 資訊工程學系(所) === 93 === A copyright protection scheme for color images using image secret sharing and wavelet transformation is proposed in the paper. The scheme contains a secret image generation phase and a watermark retrieval phase. In the generation phase, the proposed scheme extracts the features from a host color image using the discrete wavelet transformation (DWT). Therewith employs 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 copyright verification. The experiment displays that the proposed scheme can resist several mighty attacks such as JPEG compression, blurring, sharpening, scaling, and varied noise.