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題 名 | Digital Watermarking with Different Diffused Masks=相異錯誤擴散核心下之數位浮水印技術 |
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作 者 | 郭景明; | 書刊名 | 景文技術學院學報 |
卷 期 | 12(下) 民91.03 |
頁 次 | 頁237-246 |
分類號 | 312.1 |
關鍵詞 | 半色調; 有序抖動法; 錯誤擴散法; 最小平方法; 點擴散法; 數位浮水印; Halftone; Ordered dither; Error diffusion; Least-squares; Dot-diffusion; Digital watermark; |
語 文 | 英文(English) |
中文摘要 | ,在書報雜誌上的半色調影像隱藏資料逐漸引起廣泛的興趣,這篇論文提出如何將浮水印技術應用在錯誤擴散之影像上,首先,找出兩個不同的錯誤擴散核心是必須的,在此,研究中發現目前應用最廣的兩個核心-Jarvis及Stucki在實驗結果看來最為相容,在編碼端,計算複雜度並不會增加,在解碼端,由Jarvis及Stucki在轉換領的統計特性有相當大的不同,因此可正確的予以解碼。實驗結果,利用這個技術,解碼的正確率即使在經過列印的破壞後仍然保有相當高的比例。 |
英文摘要 | Recently, there is growing interest in concealing data for authentication and copyright control of halftone images [1] printed in newspapers, books and magazines. In this paper, we propose a novel watermarking technique of embedding watermarks into printed error diffusion images. In this study, at least two different diffused kernels should be available to represent a bi-level watermark. In the case of bi-level watermarking, we find that the two well-known kernels that proposed by Jarvis etc. [2] and Stucki [3] are very compatible form experimental result. In the encoder, the computational complexity is not increase at all. In the decoder, because of the different statistical property of Jarvis and Stucki in FFT domain, we use Euclidean distance to distinguish a cell of watermarked halftone image is belonged to Jarvis or Stucki. The correct decoding rate is high and robust even after the distortion caused by printing process from simulation results. |
本系統中英文摘要資訊取自各篇刊載內容。