A Copyright Protection Scheme for Gray-Level Images Using Human Fingerprint Images as Watermarks

• Main Authors: Huang, Hsuan-Chieh, 黃宣傑
• Other Authors: Shang-Lin Hsieh
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/89446888728912508379

碩士 === 大同大學 === 資訊工程研究所 === 93 === The thesis proposes a copyright protection scheme using enhanced fingerprint images as watermarks. The scheme includes enhancing fingerprint image and generating a share image to retrieve fingerprint image. If unauthorized copies are found later, the origin of the copy can be determined by the retrieved fingerprint image. In the thesis, fingerprint image enhancement technique is employed prior to feature extraction to obtain a more reliable estimation of feature locations. In addition, the thesis employs correction to reform the quality of the fingerprint image. The experimental results show that the scheme can withstand 9 kinds of common image processing operations, including JPGE compression, blurring, sharpening, cropping, scaling, pinch, punch, “row and column shifting,” and “rotation and scaling.” In the experimental results, the acceptance rate is up to 99%.