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27th pacific conference on computer graphics and applications, pacific graphics 2019

ISBN: (纸本)9783038680994

the proceedings contain 9 papers. the topics discussed include: RegionSketch: interactive and rapid creation of 3D models with rich details;connectivity-preserving smooth surface filling with sharp features;a psychophysical analysis of fabricated anisotropic appearance;gaze attention and flow visualization using the smudge effect;towards biomechanically and visually plausible volumetric cutting simulation of deformable bodies;LPaintB: learning to paint from self-supervision;external forces guided fluid surface and volume reconstruction from monocular video;feature curve network extraction via quadric surface fitting;and 3D human body skeleton extraction from consecutive surfaces.

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pacific graphics 2018 - 26th pacific conference on computer graphics and applications, Short Papers and Posters Proceedings

Pacific Graphics 2018 - 26th Pacific Conference on Computer ...

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26th pacific conference on computer graphics and applications, pacific graphics 2018

ISBN: (纸本)9783038680734

the proceedings contain 27 papers. the topics discussed include: StretchDenoise: parametric curve reconstruction with guarantees by separating connectivity from residual uncertainty of samples;robust and efficient SPH simulation for high-speed fluids with the dynamic particle partitioning method;bottom-up/top-down geometric object reconstruction with CNN classification for mobile education;effects of surface anisotropy on perception of car body attractiveness;efficient metropolis path sampling for material editing and re-rendering;mesh parameterization: a viewpoint from constant mean curvature surfaces;skeleton-based generalized cylinder deformation under the relative curvature condition;and anisotropic spectral manifold wavelet descriptor for deformable shape analysis and matching.

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3D human body skeleton extraction from consecutive surfaces 27

3D human body skeleton extraction from consecutive surfaces

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27th pacific conference on computer graphics and applications, pacific graphics 2019

作者： Zhang, Yong Tan, Fei Wang, Shaofan Kong, Dehui Yin, Baocai Beijing Key Laboratory of Multimedia and Intelligent Software Technology Faculty of Information Technology Beijing University of Technology Beijing100124 China Graz Faculty of Electronic Information and Electrical Engineering Dalian University of Technology Dalian116024 China

ISBN: (纸本)9783038680994

Extracting human body skeletons from consecutive surfaces is an important research topic in the fields of computer graphics and human computer interaction, especially in posture estimation and skeleton animation. Current approaches mainly suffer from following problems: insufficient time and space continuity, not robust to background, ambient noise, etc. Our approach is to improve against these shortcomings. this paper proposes a 3D human body skeleton extraction method from consecutive meshes. We extract the consistent skeletons from consecutive surfaces based on shape segmentation and construct skeleton sequences, then we use the continuous frame skeleton point optimization model we proposed to optimize the skeleton sequences, generating the final skeleton point sequences which are more accurate. Finally, we verify that our method can obtain more complete and accurate skeletons compared to other methods through many experiments. © 2019 the Author(s) Eurographics Proceedings © 2019 the Eurographics Association.

关键词： computer graphics

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Gaze attention and flow visualization using the smudge effect 27

Gaze attention and flow visualization using the smudge effec...

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27th pacific conference on computer graphics and applications, pacific graphics 2019

作者： Yoo, Sangbong Jeong, Seongmin Kim, Seokyeon Jang, Yun Department of Computer Engineering Sejong University Seoul Korea Republic of

ISBN: (纸本)9783038680994

Many advanced gaze visualization techniques have been developed continuously based on the fundamental gaze visualizations such as scatter plots, attention map, and scanpath. However, it is not easy to locate challenging visualization techniques that resolve the limitations presented in the conventional gaze visualizations. therefore, in this paper, we propose a novel visualization applying the smudge technique to the attention map. the proposed visualization intuitively shows the gaze flow and AoIs (Area of Interests) of an observer. Besides, it provides fixation, saccade, and micro-movement information, which allows us to respond to various analytical goals within a single visualization. Finally, we provide two case studies to show the effectiveness of our technique. © 2019 the Author(s) Eurographics Proceedings © 2019 the Eurographics Association.

关键词： Visualization

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Regionsketch: Interactive and rapid creation of 3D models with rich details 27

Regionsketch: Interactive and rapid creation of 3D models wi...

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27th pacific conference on computer graphics and applications, pacific graphics 2019

作者： Liu, Shuai Hou, Fei Hao, Aimin Qin, Hong State Key Laboratory of Virtual Reality Technology and Systems Beihang University China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences China Department of Computer Science Stony Brook University United States

ISBN: (纸本)9783038680994

In this paper, we articulate a new approach to interactive generation of 3D models with rich details by way of sketching sparse 2D strokes. Our novel method is a natural extension of Poisson vector graphics (PVG). We design new algorithms that distinguish themselves from other existing sketch-based design systems with three unique features: (1) A novel sketch metaphor to create freeform surface based on Poisson's equation, which is simple, intuitive, and free of ambiguity;(2) Convenient and flexible user interface that affords the user to add rich details to the surface with simple sketch input;and (3) Rapid model creation with sparse strokes, which enables novice users to enjoy the utilities of our system to create expected 3D models. We validate the proposed method through a large repository of interactively sketched examples. Our experiments and produced results confirm that our new method is a simple yet efficient design tool for modeling free-form shapes with simple and intuitive 2D sketches input. © 2019 the Author(s) Eurographics Proceedings © 2019 the Eurographics Association.

关键词： User interfaces

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Interactive Design and Preview of Colored Snapshots of Indoor Scenes

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computer graphics FORUM 2020年第7期39卷 543-552页

作者： Fu, Qiang Yan, Hai Fu, Hongbo Li, Xueming Beijing Univ Posts & Telecommun Sch Digital Media & Design Arts Beijing Peoples R China City Univ Hong Kong Sch Creat Media Hong Kong Peoples R China

this paper presents an interactive system for quickly designing and previewing colored snapshots of indoor scenes. Different from high-quality 3D indoor scene rendering, which often takes several minutes to render a moderately complicated scene under a specific color theme with high-performance computing devices, our system aims at improving the effectiveness of color theme design of indoor scenes and employs an image colorization approach to efficiently obtain high-resolution snapshots with editable colors. Given several pre-rendered, multi-layer, gray images of the same indoor scene snapshot, our system is designed to colorize and merge them into a single colored snapshot. Our system also assists users in assigning colors to certain objects/components and infers more harmonious colors for the unassigned objects based on pre-collected priors to guide the colorization. the quickly generated snapshots of indoor scenes provide previews of interior design schemes with different color themes, making it easy to determine the personalized design of indoor scenes. To demonstrate the usability and effectiveness of this system, we present a series of experimental results on indoor scenes of different types, and compare our method with a state-of-the-art method for indoor scene material and color suggestion and offline/online rendering software packages.

关键词： CCS Concepts • Applied computing $Ar computer-aided design • Computing methodologies $Ar graphics systems and interfaces Rendering

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An efficient wavelet-based compression method for volume rendering 7

An efficient wavelet-based compression method for volume ren...

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7th pacific conference on computer graphics and applications, pacific graphics 1999

作者： Kim, Tae-Young Shin, Yeong Gil Department of Computer Science Seoul National University San 56-1 Shinlim-Dong Kwanak-Gu Seoul151-742 Korea Republic of

ISBN: (纸本)0769502938

Since volume rendering needs a lot of computation time and memory space, many researches have been suggested for accelerating rendering or reducing data size using compression techniques. However, there is little progress in a research for accomplishing these goals. this paper presents an efficient wavelet-based compression method providing fast visualization of large volume data, which is divided into individual blocks with regular resolution. Wavelet transformed block is runlength encoded in accordance with the reconstruction order resulting in a fairly good compression ratio and fast reconstruction. A cache data structure is designed to speed up the reconstruction, and an adaptive compression scheme is proposed to produce a higher quality rendered image. the compression method proposed here is combined with several accelerated volume rendering algorithms, such as brute-force volume rendering with min-max table and Lacroute's shear-warp factorization. Experimental results have shown the space requirement to be about 1/27 and the rendering time to be about 3 seconds for 512×512×512 data sets while preserving the quality of an image much like using the original data. © 1999 IEEE.

关键词： Volume rendering

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Anti-Piracy of Analog and Mixed-Signal Circuits in FD-SOI 22

Anti-Piracy of Analog and Mixed-Signal Circuits in FD-SOI

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27th Asia and South pacific Design Automation conference (ASP-DAC)

作者： Tlili, Mariam Sayed, Alhassan Mahmoud, Doaa Louerat, Marie-Minerve Aboushady, Hassan Stratigopoulos, Haralampos-G. Sorbonne Univ CNRS LIP6 Paris France Minia Univ Al Minya Egypt

ISBN: (纸本)9781665421355

We propose an anti-piracy security technique based on locking for analog and mixed-signal circuits designed in FD-SOI. We show that obfuscating the body-bias voltages of tunable transistors is an effective way for inducing high functionality corruption. the obfuscation is achieved by constituting a secret key from the concatenation of the input digital codes of the body-bias generators that produce the correct body-bias voltages. We also propose a slight modification of the bodybias generator that increases prohibitively the time complexity of counter-attacks aiming at finding an approximate key. the proposed locking scheme is demonstrated on a Sigma Delta modulator used in highly-digitized RF receiver architectures.

关键词： Integrated circuits Codes Modulation Switches Rendering (computer graphics) Generators Transistors

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Towards biomechanically and visually plausible volumetric cutting simulation of deformable bodies 27

Towards biomechanically and visually plausible volumetric cu...

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27th pacific conference on computer graphics and applications, pacific graphics 2019

作者： Qian, Yinling Huang, Wenbin Si, Weixin Liao, Xiangyun Wang, Qiong Heng, Pheng-Ann Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences China T Stone Robotics Institute The Chinese University of Hong Kong Hong Kong Department of Computer Science and Engineering The Chinese University of Hong Kong Hong Kong

ISBN: (纸本)9783038680994

Due to the simplicity and high efficiency, composited finite element method(CFEM) based virtual cutting attracted much attention in the field of virtual surgery in recent years. Even great progress has been made in volumetric cutting of deformable bodies, there are still several open problems restricting its applications in practical surgical simulator. First among them is cutting fracture modelling. Recent methods would produce cutting surface immediately after an intersection between the cutting plane and the object. But in real cutting, biological tissue would first deform under the external force induced by scalpel and then fracture occurs when the stress exceeds a threshold. Secondly, it's computation-intensive to reconstruct cutting surface highly consistent with the scalpel trajectory, since reconstructed cutting surface in CFEM-based virtual cutting simulation is grid-dependent and the accuracy of cutting surface is proportional to the grid resolution. this paper propose a virtual cutting method based on CFEM which can effectively simulate cutting fracture in a biomechanically and visually plausible way and generate cutting surface which is consistent with the scalpel trajectory with a low resolution finite element grid. We model this realistic cutting as a deformation-fracture repeating process. In deformation stage, the object will deform along with the scalpel motion, while in the fracture stage cutting happens and a cutting surface will be generated from the scalpel trajectory. A delayed fracturing criteria is proposed to determine when and how the cutting fracture occurs and an influence domain adaptation method is employed to generate accurate cutting surface in both procedures of deformation and fracture. Experiments show that our method can realistically simulate volumetric cutting of deformable bodies and efficiently generate accurate cutting surface thus facilitating interactive applications. © 2019 the Author(s) Eurographics Proceedings © 2019 the

关键词： Trajectories

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Energy Harvesting Aware Multi-hop Routing Policy in Distributed IoT System Based on Multi-agent Reinforcement Learning 22

Energy Harvesting Aware Multi-hop Routing Policy in Distribu...

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27th Asia and South pacific Design Automation conference (ASP-DAC)

作者： Zhang, Wen Liu, Tao Xie, Mimi Li, Longzhuang Kar, Dulal Pan, Chen Texas A&M Univ Corpus Christi Dept Comp Sci Corpus Christi TX 78412 USA Lawrence Technol Univ Dept Math & Comp Sci Southfield MI USA Univ Texas San Antonio Dept Comp Sci San Antonio TX USA

ISBN: (纸本)9781665421355

Energy harvesting technologies offer a promising solution to sustainably power an ever-growing number of Internet of things (IoT) devices. However, due to the weak and transient natures of energy harvesting, IoT devices have to work intermittently rendering conventional routing policies and energy allocation strategies impractical. To this end, this paper, for the very first time, developed a distributed multi-agent reinforcement algorithm known as global actor-critic policy (GAP) to address the problem of routing policy and energy allocation together for the energy harvesting powered IoT system. At the training stage, each IoT device is treated as an agent and one universal model is trained for all agents to save computing resources. At the inference stage, packet delivery rate can be maximized. the experimental results show that the proposed GAP algorithm achieves similar to 1.28x and similar to 1.24x data transmission rate than that of the Q-table and ESDSRAA algorithm, respectively.

关键词： Training Spread spectrum communication Routing Rendering (computer graphics) Inference algorithms Energy harvesting Resource management

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