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| Research on the Algorithm of Semi Fragile DigitalWatermarking Based on DCT conversion |
| Zhang Qi，Li Hao |
| Qingdao University of Science and Technology |
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Abstract This paper puts forward an algorithm of semi fragile digital watermarking based on DCT conversion. The origial image
is splited and generates watermark by DCT conversion. And the image blocks are embedded with matrix generated by the keys.
It utilizes the differences between the distorted halftone image and the extracted watermark to locate the tempering position. The experiments
show that this algorithm gets high accuracy of the temper location.
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Published: 08 November 2017
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