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Alexis Michael Tourapis
Researcher at Apple Inc.
Publications - 52
Citations - 2940
Alexis Michael Tourapis is an academic researcher from Apple Inc.. The author has contributed to research in topics: Motion estimation & Motion compensation. The author has an hindex of 23, co-authored 51 publications receiving 2639 citations. Previous affiliations of Alexis Michael Tourapis include Dolby Laboratories & Princeton University.
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Journal ArticleDOI
Emerging MPEG Standards for Point Cloud Compression
Sebastian Schwarz,Marius Preda,Vittorio Baroncini,Madhukar Budagavi,Pablo Cesar,Philip A. Chou,Robert A. Cohen,Maja Krivokuca,Sebastien Lasserre,Zhu Li,Joan Llach,Mammou Khaled,Rufael Mekuria,Ohji Nakagami,Ernestasia Siahaan,Ali Tabatabai,Alexis Michael Tourapis,Vladyslav Zakharchenko +17 more
TL;DR: The main developments and technical aspects of this ongoing standardization effort for compactly representing 3D point clouds, which are the 3D equivalent of the very well-known 2D pixels are introduced.
Proceedings ArticleDOI
Enhanced predictive zonal search for single and multiple frame motion estimation
TL;DR: By considering an additional set of predictors, improving the thresholding process, and simplifying the search pattern employed by these algorithms, the Enhanced Predictive Zonal Search Algorithm (EPZS) can be improved in achieving better output quality, but also reduce complexity of the motion estimation process even further.
Proceedings ArticleDOI
Fast mode decision and motion estimation for JVT/H.264
TL;DR: A new scheme to jointly optimize motion estimation and mode decision is proposed and results show that up to 90% complexity reduction while maintaining coding efficiency.
Journal ArticleDOI
Highly efficient predictive zonal algorithms for fast block-matching motion estimation
TL;DR: Two techniques are proposed, the generalized motion vector predictor and the adaptive threshold calculation, that can be used to significantly improve the performance of many existing fast ME algorithms and create two new algorithms, named advanced predictive diamond zonal search and predictive MV field adaptive search technique.
Proceedings ArticleDOI
Predictive motion vector field adaptive search technique (PMVFAST): enhancing block-based motion estimation
TL;DR: In this paper, the Predictive Motion Vector Field Adaptive Search Technique (PMVFAST) was proposed to accelerate the full search algorithm by using predictive techniques and early termination criteria, which make use of parameters adapted to local characteristics of a frame.