標題: | Wavelet transform based digital watermarking for image authentication |
作者: | Tsai, MJ Hung, HY 資訊管理與財務金融系 註:原資管所+財金所 Department of Information Management and Finance |
公開日期: | 2005 |
摘要: | The rapid expansion of the Internet and the recent advance of digital technologies have sharply increased the availability of digital media. This paper is to investigate a wavelet based semi-fragile watermarking technique for image authentication. Image protection is achieved by the insertion of a secret wavelet tree based binary image signature (WTS) after wavelet decomposition followed by the quantization procedure. In addition, adaptive tuning steps are performed for the selected watermarked coefficients in order to increase the elasticity of watermark. During the verification, the original unmarked image is not needed for comparison. The detection of unauthorized tampering within the image is claimed by comparison with the possibly modified image's WTS and the authentic one. |
URI: | http://hdl.handle.net/11536/17883 |
ISBN: | 0-7695-2296-3 |
期刊: | Fourth Annual ACIS International Conference on Computer and Information Science, Proceedings |
起始頁: | 408 |
結束頁: | 411 |
顯示於類別: | 會議論文 |