Unseen Visible Watermarking for Multimedia Metadata Delivery
Date Issued
2007
Date
2007
Author(s)
Chuang, Shang-Chih
DOI
en-US
Abstract
We propose a novel class of watermarking schemes named as unseen visible watermarking (UVW). In this work, originally invisible patterns carrying metadata will be disclosed as long as image enhancement operations provided by common display devices are applied to the marked contents. The proposed schemes not only surpass existing visible watermarking schemes in better fidelity but also solve the limitations of invisible watermarking schemes that specific extraction modules must be deployed. Therefore, users of legacy display devices can enjoy high-quality visual experiences and still retain the convenience of value added metadata. Moreover, 2-D barcodes are integrated with the proposed UVW scheme to alleviate the constraint that conventional visible watermarking schemes cannot be directly used to deliver machine-readable metadata. On the other hand, the basic implementation of UVW suffers from the problem that messages cannot be readily embedded into contents lacking certain characteristics. A class of extended schemes, denoted as content-versatile unseen visible watermarking (CV-UVW), is devised to increase the content applicability of UVW schemes. We believe that the structures of UVW schemes are more similar to real-world watermarks than that of any existing digital watermarking scheme.
Subjects
不可視顯性浮水印
影像強化
具內容適性之不可視顯性浮水印技術
具材質適性之不可視顯性浮水印技術
二維條碼
裝置的可適性
Unseen visible watermarking (UVW)
image enhancement
content versatile unseen visible watermarking (CV-UVW)
text-adaptive unseen visible watermarking (TA-UVW)
fidelity
robustness
2-D barcodes
device versatility
Type
thesis
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