利用秘密分享與小波轉換之彩色影像著作權保護機制

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

許瓏耀(Lung-Yao Hsu)

指導教授 ： 謝尚琳

大同大學/電機資訊學院/資訊工程學系所/碩士(2005年)

摘要

這篇論文提出一種使用影像秘密分享和離散小波的彩色影像著作權保護機制，這個機制共包含兩個部份:秘密影像之產生與浮水印之取回。在秘密影像產生部份，首先將彩色影像經過取樣產生特徵平面，再透過離散小波轉換取出影像的特徵，並將取出的特徵和人眼可辦識的圖像浮水印透過影像秘密分享來產生秘密影像。在浮水印取回部份，首先將待測的彩色影像經過取樣產生特徵平面，再取出待測影像的特徵，接著和秘密影像結合來取回浮水印，最後再將所取回的浮水印與原始浮水印做比較來驗證是否侵犯著作權。
從實驗中顯示這個機制可以抵抗下列6 種影像處理: JPEG 失真壓縮、非均勻化雜訊加入、模糊化、 銳利化、縮小和裁剪。

關鍵字

離散小波轉換 ； 彩色圖片 ； 秘密分享 ； 浮水印 ； 著作權保護

並列摘要

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.

並列關鍵字

color image ； copyright protection ； discrete wavelet transformation ； secret sharing ； watermark

參考文獻

[3] Ren-Junn Hwang, “A Digital Image Copyright Protection Scheme Based on Visual Cryptography,” Tamkang Journal of Science and Engineering, vol.3, No. 2, pp. 97-106, 2000.

[1] Shang-Lin Hsieh and Bin-Yuan Huang, “A Copyright Protection Scheme for Gray-Level Images Based on Image Secret Sharing and Wavelet Transformation,” Proceedings of International Computer Symposium, 2004.

[2] C.C. Chang and J. C. Chuang, “An image intellectual property protection scheme for gray-level images using visual secret sharing strategy,” Pattern Reconition Letters, vol. 23, pp. 931-941, June 2002.

[5] Xiang Zhou, Xiaohui Duan and Daoxian Wang, “A Semi-Fragile Watermark for Image Authentication,” Proceedings of the 10th International Multimedia Modelling Conference, 2004.

[6] Xiaoqiang Li and Xiangyang Xue, “Improved Robust Watermarking in DCT Domain for Color Image,” Proceedings of the 12th International Conference on Advanced Information Networking and Network, 2004.