Author
J. Y. Guo
Bio: J. Y. Guo is an academic researcher from National Dong Hwa University. The author has contributed to research in topics: Image compression & Digital watermarking. The author has an hindex of 1, co-authored 1 publications receiving 193 citations.
Papers
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TL;DR: Simulation results demonstrate that the embedded watermarks can be almost fully extracted from images compressed with very high compression ratio.
207 citations
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TL;DR: A robust blind watermarking technique, based on block-based DCT coefficient modification, which has a higher degree of robustness against various singular and hybrid attacks and a watermark of good quality is extracted even after various simultaneous attacks.
186 citations
TL;DR: In this paper, the authors applied differential evolution (DE) algorithm to balance the tradeoff between robustness and imperceptibility by exploring multiple scaling factors in image watermarking.
168 citations
TL;DR: An optimal discrete wavelet transform-singular value decomposition (DWT-SVD) based image watermarking scheme using self-adaptive differential evolution (SDE) algorithm is presented and maintains a satisfactory image quality and watermark can still be identified after various attacks even though the watermarked image is seriously distorted.
159 citations
TL;DR: A chaotic encryption-based blind digital image watermarking technique applicable to both grayscale and color images that can be used in applications like e-healthcare and telemedicine to robustly hide electronic health records in medical images.
Abstract: This paper presents a chaotic encryption-based blind digital image watermarking technique applicable to both grayscale and color images. Discrete cosine transform (DCT) is used before embedding the watermark in the host image. The host image is divided into $8\times 8$ nonoverlapping blocks prior to DCT application, and the watermark bit is embedded by modifying difference between DCT coefficients of adjacent blocks. Arnold transform is used in addition to chaotic encryption to add double-layer security to the watermark. Three different variants of the proposed algorithm have been tested and analyzed. The simulation results show that the proposed scheme is robust to most of the image processing operations like joint picture expert group compression, sharpening, cropping, and median filtering. To validate the efficiency of the proposed technique, the simulation results are compared with certain state-of-art techniques. The comparison results illustrate that the proposed scheme performs better in terms of robustness, security, and imperceptivity. Given the merits of the proposed scheme, it can be used in applications like e-healthcare and telemedicine to robustly hide electronic health records in medical images.
141 citations
TL;DR: A robust copyright protection scheme based on fractional Fourier transform (FrFT) and visual cryptography (VC) and the experimental results show that the proposed scheme is strong enough to resist various signal processing operations.
131 citations