Title: | 資訊隱藏於影像之研究 A Study on Image Data Hiding |
Authors: | 廖敏盛 Liaw, Miin-Shenq 陳玲慧 Chen Ling-Hwei 資訊科學與工程研究所 |
Keywords: | 資訊隱藏;著作權;密碼學;加密;解密;亂數產生器;data hiding;steganography;copyright;cryptography;random number generator;least significant |
Issue Date: | 1997 |
Abstract: | 資料隱藏是一種能將資料隱藏於其它數位媒體內的技術。該數位媒體 可以是電影、靜態的影像或是聲音等等。資料隱藏的主要目的為對著作權 的保謢,對文章或影像的註記或說明,或是對於機密資料在傳遞過程中的 保謢等等。本論文提出一種將任何形式的資料以快速有效的方式隱藏於影 像中的方法。此方法主要是利用人眼視覺系統對於影像的細微變化難以察 覺的特性,將資料取代影像中與該資料之值最相近的部分。另外,本論文 亦提出一種利用亂數產生器植基於上述資料隱藏方法的密碼系統,該系統 能防止未經授權者讀取藏於影像中的資料並能防止破密者破解該系統。 Data hiding, one kind of steganography, is a technique that allows us toembed data into other digital media such as movies, still images, and audiofor the purpose of copyright protection, caption and secret messagedelivering. In this thesis, a scheme called image data hiding is proposed toembed any format of data into a still image by replacing the least significantdata. The proposed scheme is based on the characteristic of human visualsystem that a minor modification for image gray levels will be hard to beperceived by human eyes. Moreover, we also propose a cryptosystem, thatdiscourages illicit access for embedded data and the attempt of unscrambling,by applying the random number generator mechanism on our data hiding system. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT860394027 http://hdl.handle.net/11536/62854 |
Appears in Collections: | Thesis |