利用凌波轉換保護影像竄改及偵測還原; using wavelet transformation to protect image and restoration image

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题名:	利用凌波轉換保護影像竄改及偵測還原;using wavelet transformation to protect image and restoration image
作者:	呂宗儒;Chung-Ru LU
贡献者:	數學研究所
关键词:	凌波轉換;影像保護;image protection;wavelet transformation
日期:	2007-06-22
上传时间:	2009-09-22 11:08:31 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	本論文利用離散凌波轉換與區塊截斷編碼技術，設計出一套影像保護以及當影像被竄改時，如何自行檢測並進行還原。本方法，檢測人員手中並不需要有原始的影像最為比對，只需就被竄改的影像做檢測，就可以檢測出被竄改的位置及還原。在第三章中會詳敘如何將原始圖片作保護，第四章會說明實驗中所撰寫的Matlab程式與操作上要注意的地方。最後第五章將會用第四章的程式做實際的操作，進行比對觀察，將會看出本研究的效果。 The thesis utilizes techniques of discrete wavelet transformation and block truncation coding and designs a method of image protection that will conduct self-examination and restoration once the image is found tampered. The method does not require the existence of the original image to be served as a contrast with the original one. Examination can be conducted on the tampered image and the tampered location will be detected and then restored later. Chapter Three will describe how the original picture is protected. Chapter Four will illustrate the Matlab program written in the experiment and things to be taken notice of during operation. At last, Chapter Five will use the program of Chapter Four in real-condition operation and will show the results of the research by comparative observations.
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