P
Piyu Tsai
Researcher at National United University
Publications - 15
Citations - 1167
Piyu Tsai is an academic researcher from National United University. The author has contributed to research in topics: Information hiding & Digital watermarking. The author has an hindex of 8, co-authored 15 publications receiving 1082 citations. Previous affiliations of Piyu Tsai include National Chung Cheng University.
Papers
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Reversible image hiding scheme using predictive coding and histogram shifting
TL;DR: The similarity of neighboring pixels in the images was explored by using the prediction technique and the residual histogram of the predicted errors of the host image was used to hide the secret data in the proposed scheme, and a higher hiding capacity was obtained and a good quality stego-image was preserved.
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SVD-based digital image watermarking scheme
TL;DR: In this paper, a singular value decomposition (SVD)-based watermarking scheme is proposed, which preserves both one-way and non-symmetric properties, usually not obtainable in DCT and DFT transformations.
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A color image watermarking scheme based on color quantization
TL;DR: A new color image watermarking scheme based on the color quantization technique is proposed and experimental results are shown to demonstrate the validity of the proposed scheme.
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Using set partitioning in hierarchical trees to authenticate digital images
TL;DR: The experimental results show that the proposed scheme can distinguish acceptable operations from malicious manipulations, and the positions of tampered areas can be located accurately.
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An Adaptive Two-Stage Edge Detection Scheme for Digital Color Images
TL;DR: An adaptive two-stage edge detection scheme for digital color images that locates the edge boundaries to the sub-pixel accuracy, which is an advantage to applications such as data hiding and image watermarking is proposed.