Study of probability-based tampering authentication scheme for digital images
碩士 === 銘傳大學 === 資訊管理學系碩士班 === 97 === In recent years, digital watermarking technology has been widely used for digital images of property rights protection and integrity authentication. Image integrity authentication is usually done by a fragile watermarking scheme, which means to embed an image of...
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ndltd-TW-097MCU053960212018-04-10T17:12:57Z http://ndltd.ncl.edu.tw/handle/55w4hc Study of probability-based tampering authentication scheme for digital images 結合機率理論的影像竄改偵測方法之研究 Yin-Liang Wang 王尹良 碩士 銘傳大學 資訊管理學系碩士班 97 In recent years, digital watermarking technology has been widely used for digital images of property rights protection and integrity authentication. Image integrity authentication is usually done by a fragile watermarking scheme, which means to embed an image of feature values as an authentication message. When authenticating image integrity, the embedded authentication message in the image is extracted for comparison with the image feature values to identify whether the image has been tampered with, and if so, locate the affected area. However, such authentication schemes may result in detection error problems. Namely, the tampered area may be misjudged as not having been tampered with, or vice versa. Hence, methods that effectively reduce errors in tampering detection have become an important research topic. This study aims to integrate a probability theory to improve image tampering detection accuracy and precision. The scheme includes two processes: the embedding of an image authentication message and tampering detection. In the image tampering detection process, in addition to identifying whether the image has been tampered with and locating the tampered area, through the authentication message embedded in the image, a probability theory is employed to improve previously obtained detection results to enhance authentication accuracy. The experimental results reveal that the proposed scheme performs better in terms of detection precision and authentication accuracy rate. Ching-Sheng Hsu 許慶昇 2009 學位論文 ; thesis 81 zh-TW |
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碩士 === 銘傳大學 === 資訊管理學系碩士班 === 97 === In recent years, digital watermarking technology has been widely used for digital images of property rights protection and integrity authentication. Image integrity authentication is usually done by a fragile watermarking scheme, which means to embed an image of feature values as an authentication message. When authenticating image integrity, the embedded authentication message in the image is extracted for comparison with the image feature values to identify whether the image has been tampered with, and if so, locate the affected area. However, such authentication schemes may result in detection error problems. Namely, the tampered area may be misjudged as not having been tampered with, or vice versa. Hence, methods that effectively reduce errors in tampering detection have become an important research topic. This study aims to integrate a probability theory to improve image tampering detection accuracy and precision. The scheme includes two processes: the embedding of an image authentication message and tampering detection. In the image tampering detection process, in addition to identifying whether the image has been tampered with and locating the tampered area, through the authentication message embedded in the image, a probability theory is employed to improve previously obtained detection results to enhance authentication accuracy. The experimental results reveal that the proposed scheme performs better in terms of detection precision and authentication accuracy rate.
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author2 |
Ching-Sheng Hsu |
author_facet |
Ching-Sheng Hsu Yin-Liang Wang 王尹良 |
author |
Yin-Liang Wang 王尹良 |
spellingShingle |
Yin-Liang Wang 王尹良 Study of probability-based tampering authentication scheme for digital images |
author_sort |
Yin-Liang Wang |
title |
Study of probability-based tampering authentication scheme for digital images |
title_short |
Study of probability-based tampering authentication scheme for digital images |
title_full |
Study of probability-based tampering authentication scheme for digital images |
title_fullStr |
Study of probability-based tampering authentication scheme for digital images |
title_full_unstemmed |
Study of probability-based tampering authentication scheme for digital images |
title_sort |
study of probability-based tampering authentication scheme for digital images |
publishDate |
2009 |
url |
http://ndltd.ncl.edu.tw/handle/55w4hc |
work_keys_str_mv |
AT yinliangwang studyofprobabilitybasedtamperingauthenticationschemefordigitalimages AT wángyǐnliáng studyofprobabilitybasedtamperingauthenticationschemefordigitalimages AT yinliangwang jiéhéjīlǜlǐlùndeyǐngxiàngcuàngǎizhēncèfāngfǎzhīyánjiū AT wángyǐnliáng jiéhéjīlǜlǐlùndeyǐngxiàngcuàngǎizhēncèfāngfǎzhīyánjiū |
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