Autor:	Shun-Yu Huang, 黃舜俞
Rok vydání:	2010
Druh dokumentu:	學位論文 ; thesis
Popis:	99 It's more careful to avoid being captured and tampered information as you sent information in this times, information developed and widespread use of computers. This topic is how to extract watermarking in a correct way after suffering rotation attack. Verifier can verify the correctness of images with the integrity of the purpose to protect intellectual properties. We embed watermark in the fan-shape area. After embedding the procedure, the relationship between pixel and pixel will not been changed, so we can extract the watermark correctly. We present a new watermark method to resist rotation attack. We can extract the correct watermark form the image that has been modified.
Databáze:	Networked Digital Library of Theses & Dissertations
Externí odkaz:	http://ndltd.ncl.edu.tw/handle/72344587962532568640 Zobrazit plný text záznamu