World's Best Scientists 2026 revealed!

D-Index & Metrics

Computer Science

D-Index
48
Citations
10162
World Ranking
6142
National Ranking
812

Electronics and Electrical Engineering

D-Index
46
Citations
9450
World Ranking
3355
National Ranking
542

Research.com Recognitions

  • 2012 - IEEE Fellow For contributions to multimedia coding and security

Overview

Oscar C. Au is affiliated with the Hong Kong University of Science and Technology in China. Their academic work is recognized within the field of multimedia coding and security, evidenced by their elevation to IEEE Fellow status in 2012 for contributions to these areas.

Their research scope centers primarily on multimedia coding and related security technologies. This specialization integrates aspects of data encoding, compression, and the safeguarding of multimedia content against unauthorized access or manipulation.

The recognition as an IEEE Fellow marks a notable distinction in their career, highlighting significant contributions to the development and improvement of multimedia coding standards and security protocols utilized in digital communication and storage.

They have engaged with various academic and technical communities through their association with Hong Kong University of Science and Technology, contributing to the institution's research output in relevant fields.

Best Publications

  • Predictive motion vector field adaptive search technique (PMVFAST): enhancing block-based motion estimation

    Alexis Michael Tourapis;Oscar Chi Lim Au;Ming Lei Liou

  • Highly efficient predictive zonal algorithms for fast block-matching motion estimation

    A.M. Tourapis;O.C. Au;M.L. Liou

  • Data hiding watermarking for halftone images

    Ming Sun Fu;O.C. Au

  • Novel blind multiple watermarking technique for images

    P.H.W. Wong;O.C. Au;Y.M. Yeung

  • Secure Reversible Image Data Hiding Over Encrypted Domain via Key Modulation

    Jiantao Zhou;Weiwei Sun;Li Dong;Xianming Liu

  • Designing an Efficient Image Encryption-Then-Compression System via Prediction Error Clustering and Random Permutation

    Jiantao Zhou;Xianming Liu;Oscar C. Au;Yuan Yan Tang

  • Multiresolution Graph Fourier Transform for Compression of Piecewise Smooth Images

    Wei Hu;Gene Cheung;Antonio Ortega;Oscar C. Au

  • Efficient multi-frame motion estimation for video compression

    Oscar Chi-Lim Au;Andy Chang

  • An adaptive unsupervised approach toward pixel clustering and color image segmentation

    Zhiding Yu;Oscar C. Au;Ruobing Zou;Weiyu Yu

  • Video Error Concealment Using Spatio-Temporal Boundary Matching and Partial Differential Equation

    Yan Chen;Yang Hu;O.C. Au;Houqiang Li

  • Efficient intra-prediction mode selection for 4/spl times/4 blocks in H.264

    B. Meng;O.C. Au;Chi-Wah Wong;Hong-Kwai Lam

  • Fast intra-prediction mode selection for 4A blocks in H.264

    B. Meng;O.C. Au

  • Security Analysis of Multimedia Encryption Schemes Based on Multiple Huffman Table

    Jiantao Zhou;Zhiqin Liang;Yan Chen;O.C. Au

  • Video Coding on Multicore Graphics Processors

    Nagai-Man Cheung;Xiaopeng Fan;O.C. Au;Man-Cheung Kung

  • Device, method and digital video encoder for block-matching motion estimation

    Oscar Chi-Lim Au;Ming Lei Liou;Alexandros Tourapis;Guobin Shen

  • Methods and apparatus for hiding data in halftone images

    Oscar Chi-Lim Au;Ming Sun Fu

  • Data hiding in halftone images by stochastic error diffusion

    Ming Sun Fu;O.C. Au

  • Lossless Visible Watermarking

    Shu-kei Yip;Oscar Au;Chi-wang Ho;Hoi-ming Wong

  • Depth map denoising using graph-based transform and group sparsity

    Wei Hu;Xin Li;Gene Cheung;Oscar Au

  • New results on zonal based motion estimation algorithms-advanced predictive diamond zonal search

    A.M. Tourapis;O.C. Au;M.L. Liou

Frequent Co-Authors

Jiantao Zhou
Jiantao Zhou University of Macau
Beibei Wang
Beibei Wang University of Maryland, College Park
Ngai-Man Cheung
Ngai-Man Cheung Singapore University of Technology and Design
Yan Chen
Yan Chen University of Science and Technology of China
Chenshu Wu
Chenshu Wu University of Hong Kong
Yuan Yuan
Yuan Yuan Huawei Technologies (China)
Gene Cheung
Gene Cheung York University
Jiang Xu
Jiang Xu Hong Kong University of Science and Technology
Wei Hu
Wei Hu Nanjing University
Cha Zhang
Cha Zhang Microsoft (United States)

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