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frame interpolation with pixel-level motion vector field and mesh based hole filling

CAAI Transactions on Intelligence Technology 2016年第1期1卷 72-78页

作者： Chuanxin Tang Ronggang Wang Zhu Li Wenmin Wang Wen Gao School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Shenzhen 518055 China School of Computing & Engineering University of Missouri Kansas City MO 64110 USA

Most of the traditional methods are based on block motion compensation tending to involve heavy blocking artifacts in the interpolated frames. In this paper, a new frame interpolation method with pixel-level motion vector field （MVF） is proposed. Our method consists of the following four steps：（i） applying the pixel-level motion vectors （MVs） estimated by optical flow algorithm to eliminate blocking artifacts （ii） motion post-processing and super-sampling anti-aliasing to solve the problems caused by pixel-level MVs （iii） robust warping method to address collisions and holes caused by occlusions （iv） a new holes filling method using triangular mesh （HFTM） to reduce the artifacts caused by holes. Experimental results show that the proposed method can effectively alleviate the holes and blocking artifacts in interpolated frames, and outperforms existing methods both in terms of objective and subjective performances, especially for sequences with complex motions.

关键词： frame interpolation Motion estimation Motion vector field frame rate up-conversion Triangular mesh

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Time analysis of regional structure of large-scale particle using an interactive visual system

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Visual Informatics 2022年第2期6卷 14-24页

作者： Yihan Zhang Guan Li Guihua Shan Computer Network Information Center Chinese Academy of SciencesChina University of Chinese Academy of Sciences China

N-body numerical simulation is an important tool in *** used this method to simulate the formation of structure of the universe,which is key to understanding how the universe *** research on this subject further develops,astronomers require a more precise method that enables expansion of the simulation and an increase in the number of simulation ***,retaining all temporal information is infeasible due to a lack of computer *** the circumstances,astronomers reserve temporal data at intervals,merging rough and baffling animations of universal *** this study,we propose a deep-learning-assisted interpolation application to analyze the structure formation of the ***,we evaluate the feasibility of applying interpolation to generate an animation of the universal evolution through an ***,we demonstrate the superiority of deep convolutional neural network(DCNN)method by comparing its quality and performance with the actual results together with the results generated by other popular interpolation *** addition,we present PRSVis,an interactive visual analytics system that supports global volume rendering,local area magnification,and temporal animation *** allows users to visualize a global volume rendering,interactively select one cubic region from the rendering and intelligently produce a time-series animation of the high-resolution region using the deep-learning-assisted *** summary,we propose an interactive visual system,integrated with the DCNN interpolation method that is validated through experiments,to help scientists easily understand the evolution of the particle region structure.

关键词： Visual analytics frame interpolation Interactive Particle region structure

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Side Information Generation Based on Hierarchical Motion Estimation in Distributed Video Coding

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Chinese Journal of Aeronautics 2009年第2期22卷 167-173页

作者：刘荣科岳志陈长汶北京航空航天大学电子信息工程学院纽约州立大学 Bafflo分校

The side information quality has an immense effect on the compression efficiency of the distributed video coding (DVC) sys- tem. This article, based on the hierarchical motion estimation (HME), proposes a new side information generation algorithm which is integrated into DVC system. First, forward motion estimation (FME) and bidirectional motion estimation (BME) on the basis of variable block size HME algorithm are used to acquire relatively accurate motion vectors. Second, a motion vector filter (MVF) is i...

关键词： communication technology video signal processing hierarchical motion estimation side information motion vector filter frame interpolation

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