易碎型浮水印是一種用於偵測影像竄改的技術，為了能還原遭受竄改的部份，有許多學者在竄改偵測的機制上，進一步加上修復竄改部位的方法。本研究應用秘密分享的概念，提出一套竄改影像復原機制，本研究將影像區塊的回復訊息分解成四份，分散地嵌入在不同的影像區塊中，若要回復遭受竄改的影像區塊，便取回此區塊回復訊息的期中三份，便可復原影像區塊。至於影像竄改偵測的部份，本研究引用Hsu and Tu 學者所提出的以機率理論為基礎的方法，該方法的偵測錯誤率較低，有利於回復效果的提升。
Fragile watermarking is a technique used to detect the image tampering. In order to fix the tamperd image, many researchers have added the image recovery in the detection function. This study applies the secret sharing scheme to split recovery message and suggests a series of image recovery control. It separates the recovery message into four shares. In order to recover tampered image, retrieve any three shares and then the tampered area can be fixed.
As to the image detection, this study employs the Hsu and Tu's method, which has a very law error rate and enhances the effect of the recovery.
