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检索条件"任意字段=Proceedings of the 26th Spring Conference on Computer Graphics"

共 160 条记录，以下是11-20 订阅

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Shape interpolation via multiple curves 26

Shape interpolation via multiple curves

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Sahillioğlu, Yusuf Aydınlılar, Melike Computer Engineering Department Middle East Technical University Turkey

ISBN: (纸本)9783038680734

We present a method that interpolates new shapes between a given pair of source and target shapes. To this end, we utilize a database of related shapes that is used to replace the direct transition from the source to the target by a composition of small transitions. this so-called data-driven interpolation scheme proved useful as long as the database is sufficiently large. We advance this idea one step further by processing the database shapes part by part, which in turn enables realistic interpolations with relatively small databases. We obtain promising preliminary results and point out potential improvements that we intend to address in our future work. © 2018 the Author(s).

关键词： Database systems

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Facial-expression-aware emotional color transfer 26

Facial-expression-aware emotional color transfer

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Pei, M. Liu, S. Zhang, X. School of Computer Science and Technology Tianjin University China School of Computer Software Tianjin University China

ISBN: (纸本)9783038680734

Emotional color transfer aims to change the evoked emotion of the source image to that of the target image by adjusting color distribution. Most of existing emotional color transfer methods ignore the facial expression features in the image. therefore, we propose a new facial-expression-aware emotional color transfer framework. We firstly predict the emotion label of the image through the emotion classification network. then, emotion labels are matched with pre-trained emotional models. Finally, we use the matched emotion model to transfer the color of the target image to the input image. Experiments demonstrate that our method outperforms the state-of-the-arts, which can successfully capture and transfer sophisticated emotion features. © 2018 the Author(s).

关键词： Color

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TAvE: Template-based augmentation of visual effects to human actions in videos 26

TAvE: Template-based augmentation of visual effects to human...

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Liu, J. Zhou, X. Fu, H. Tai, C.L. Department of Computer Science and Engineering HKUST School of Creative Media City University of Hong Kong Hong Kong

ISBN: (纸本)9783038680734

We present TAVE, a framework that allows novice users to add interesting visual effects by mimicking human actions in a given template video, in which pre-defined visual effects have already been associated with specific human actions. Our framework is mainly based on high-level features of human pose extracted from video frames, and uses low-level image features as the auxiliary information. We encode an action into a set of code sequences representing joint motion directions and use a finite state machine to recognize the action state of interest. the visual effects, possibly with occlusion masks, can be automatically transferred from the template video to a target video containing similar human actions. © 2018 the Author(s).

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Enhancing Performance of computer Vision Applications on Low-Power Embedded Systems through Heterogeneous Parallel Programming 26

Enhancing Performance of Computer Vision Applications on Low...

引用

26th IFIP/IEEE International conference on Very Large Scale Integration (VLSI-SoC)

作者： Aldegheri, Stefano Manzato, Silvia Bombieri, Nicola Univ Verona Dept Comp Sci Verona Italy

ISBN: (纸本)9781538647561

Enabling computer vision applications on low-power embedded systems gives rise to new challenges for embedded SW developers. Such applications implement different functionalities, like image recognition based on deep learning, simultaneous localization and mapping tasks. they are characterized by stringent performance constraints to guarantee real-time behaviors and, at the same time, energy constraints to save battery on the mobile platform. Even though heterogeneous embedded boards are getting pervasive for their high computational power at low power costs, they need a time consuming customization of the whole application (i.e., mapping of application blocks to CPU-GPU processing elements and their synchronization) to efficiently exploit their potentiality. Different languages and environments have been proposed for such an embedded SW customization. Nevertheless, they often find limitations on complex real cases, as their application is mutual exclusive. this paper presents a comprehensive framework that relies on a heterogeneous parallel programming model, which combines OpenMP, Pthreads, OpenVX, OpenCV, and CUDA to best exploit different levels of parallelism while guaranteeing a semi-automatic customization. the paper shows how such languages and API platforms have been interfaced, synchronized, and applied to customize an ORB-SLAM application for an NVIDIA Jetson TX2 board.

关键词： graphics processing units computer vision Kernel Task analysis Computational modeling Power demand Libraries

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Direct limit volumes: Constant-time limit evaluation for Catmull-clark solids 26

Direct limit volumes: Constant-time limit evaluation for Cat...

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Altenhofen, C. Müller, J. Weber, D. Stork, A. Fellner, D.W. Fraunhofer Institute for Computer Graphics Research IGD Darmstadt Germany Technische Universität Darmstadt Darmstadt Germany Graz University of Technology Institute of Computer Graphics and Knowledge Visualization Graz Austria

ISBN: (纸本)9783038680734

We present a novel approach for efficient limit volume evaluation on Catmull-Clark (CC) subdivision solids. Although several analogies exist between subdivision surfaces and subdivision volumes, extending Stam’s limit evaluation technique from 2 to 3 dimensions is not straightforward, as irregularities and boundaries introduce new challenges in the volumetric case. We present new direct evaluation techniques for irregular volumetric topologies and boundary cells, which allow for calculating the limit of CC subdivision solids at arbitrary parameter values in constant time. Evaluation of limit points is a central aspect when using CC solids for applications such as simulation and multi-material additive manufacturing, or as a compact volumetric representation scheme for continuous scalar fields. We demonstrate that our approach is faster than existing evaluation techniques for every topological configuration or target parameter (u, v, w) that requires more than two local subdivision steps. © 2018 the Author(s).

关键词： Topology

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Modeling detailed cloud scene from multi-source images 26

Modeling detailed cloud scene from multi-source images

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Cen, Yunchi Liang, Xiaohui Chen, Junping Yang, Bailin Li, Frederick W.B. State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing100191 China School of Computer Science and Information Engineering Zhejiang Gongshang University Hangzhou310018 China Department of Computer Science University of Durham DurhamDH1 3LE United Kingdom

ISBN: (纸本)9783038680734

Realistic cloud is essential for enhancing the quality of computer graphics applications, such as flight simulation. Data-driven method is an effective way in cloud modeling, but existing methods typically only utilize one data source as input. For example, natural images are usually used to model small-scale cloud with details, and satellite images and WRF data are used to model large scale cloud without details. To construct large-scale cloud scene with details, we propose a novel method to extract relevant cloud information from both satellite and natural images. Experiments show our method can produce more detailed cloud scene comparing with existing methods. © 2018 the Author(s).

关键词： Flight simulators

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A deep learned method for video indexing and retrieval 26

A deep learned method for video indexing and retrieval

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Men, X. Zhou, F. Li, X. Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9783038680734

In this paper, we proposed a deep neural network based method for content based video retrieval. Our approach leveraged the deep neural network to generate the semantic information and introduced the graph-based storage structure to establish the video indices. We devised the Inception-Single Shot Multibox Detector (ISSD) and RI3D model to extract spatial semantic information (objects) and extract temporal semantic information (actions). Our ISSD model achieved a mAP of 26.7% on MS COCO dataset, increasing 3.2% over the original SSD model, while the RI3D model achieved a top-1 accuracy of 97.7% on dataset UCF-101. And we also introduced the graph structure to build the video index with the temporal and spatial semantic information. Our experiment results showed that the deep learned semantic information is highly effective for video indexing and retrieval. © 2018 the Author(s).

关键词： Deep neural networks

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Extreme feature regions for image matching 26

Extreme feature regions for image matching

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Fan, Baijiang Rao, Yunbo Pu, Jiansu Deng, Jianhua School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu China School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9783038680734

Extreme feature regions are increasingly critical for many image matching applications on affine image-pairs. In this paper, we focus on the time-consumption and accuracy of using extreme feature regions to do the affine-invariant image matching. Specifically, we proposed novel image matching algorithm using three types of critical points in Morse theory to calculate precise extreme feature regions. Furthermore, Random Sample Consensus (RANSAC) method is used to eliminate the features of complex background, and improve the accuracy of the extreme feature regions. Moreover, the saddle regions is used to calculate the covariance matrix for image matching. Extensive experiments on several benchmark image matching databases validate the superiority of the proposed approaches over many recently proposed affine-invariant SIFT algorithms. © 2018 the Author(s).

关键词： Image matching

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Skeleton-based generalized cylinder deformation under the relative curvature condition 26

Skeleton-based generalized cylinder deformation under the re...

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Ma, R. Zhao, Q. Wang, R. Damon, J. Rosenman, J. Pizer, S. UNC Chapel Hill Computer Science UNC Chapel Hill Mathematics UNC Chapel Hill Radiation Oncology

ISBN: (纸本)9783038680734

Deformation of a generalized cylinder with a parameterized shape change of its centerline is a non-trivial task when the surface is represented as a high-resolution triangle mesh, particularly when self-intersection and local distortion are to be avoided. We introduce a deformation approach that satisfies these properties based on the skeleton (densely sampled centerline and cross sections) of a generalized cylinder. Our approach uses the relative curvature condition to extract a reasonable centerline for a generalized cylinder whose orthogonal cross sections will not intersect. Given the desired centerline shape as a parametric curve, the displacements on the cross sections are determined while controlling for twisting effects, and under this constraint a vertex-wise displacement field is calculated by minimizing a quadratic surface bending energy. the method is tested on complicated generalized cylindrical objects. In particular, we discuss one application of the method for human colon (large intestine) visualization. © 2018 the Author(s).

关键词： Deformation

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Robust and efficient SPH simulation for high-speed fluids with the dynamic particle partitioning method 26

Robust and efficient SPH simulation for high-speed fluids wi...

引用

26th Pacific conference on computer graphics and Applications, Pacific graphics 2018

作者： Zheng, Zhong Gao, Yang Li, Shuai Qin, Hong Hao, Aimin State Key Laboratory of Virtual Reality Technology and Systems Beihang University China Beihang University Qingdao Research Institute Beihang University China Department of Computer Science Stony Brook University United States

ISBN: (纸本)9783038680734

In this paper, our research efforts are devoted to the efficiency issue of the SPH simulation when the ratio of velocities among fluid particles is large. Specifically, we introduce a k-means clustering method into the SPH framework to dynamically partition fluid particles into two disjoint groups based on their velocities, we then use a two-scale time step scheme for these two types of particles. the smaller time steps are for particles with higher speed in order to preserve temporal details and guarantee the numerical stability. In contrast, the larger time steps are used for particles with smaller speeds to reduce the computational expense, and both types of particles are tightly coupled in the simulation. We conduct various experiments which have manifested the advantages of our methods over the conventional SPH technique and its new variants in terms of efficiency and stability. © 2018 the Author(s).

关键词： K-means clustering

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