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Dense Three-Dimensional Color Reconstruction for Large-Scale Outdoor Scenes

Dense Three-Dimensional Color Reconstruction for Large-Scale...

引用

Asia-pacific-Signal-and-Information-Processing-Association Annual Summit and conference (APSIPA ASC)

作者： Liu, Zixiao Guo, Sheng Pun, Man-On Chinese Univ Hong Kong Shenzhen Shenzhen Peoples R China Guangdong Lab Artificial Intelligence & Digital E Shenzhen Peoples R China

ISBN: (纸本)9798350300673

Accurate three-dimensional (3D) color models play a crucial role in various emerging applications, such as geographic surveying and mapping, smart cities, and digital twin cities. To achieve high-fidelity representations of large-scale scenes, recent advancements in machine learning techniques and LiDAR-based Simultaneous Localization and Mapping (SLAM) have been instrumental. Leveraging these cutting-edge technologies, this paper presents a sensor-fusion framework that integrates a solid-state LiDAR, an inertial measurement unit (IMU), and a monocular camera. Additionally, a point cloud upsampling technique is introduced into LiDAR SLAM to enhance the density of the point clouds. Within this framework, the LiDAR-IMU odometry accurately estimates the positions and poses of the collected point clouds. Simultaneously, synchronized images are captured and utilized to incorporate texture information into the point clouds. The proposed framework demonstrates its capability to generate highly detailed and dense 3D color models for large-scale outdoor scenes, all within a limited on-site scanning time. Extensive experimental results validate the effectiveness and efficiency of the proposed approach.

关键词： Three dimensional computer graphics

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Data memory minimization by sharing large size buffers 00

Data memory minimization by sharing large size buffers

引用

2000 Asia and South pacific Design Automation conference, ASP-DAC 2000

作者： Oh, Hyunok Ha, Soonhoi Department of Computer Engineering Seoul National University Korea Republic of

ISBN: (纸本)0780359747

This paper presents software synthesis techniques to deal with non-primitive data type from graphical dataflow programs based on the synchronous dataflow (SDF) model. Non-primitive data types, often used in multimedia and graphics applications, require buffer memory of large size. To minimize the buffer requirement, we separate global data buffers and local pointer buffers. The proposed approach first allocates the minimum size of global buffers and next binds the local buffers to the global buffers by setting the pointers. Static binding and dynamic binding techniques are devised. Experimental results prove the significance of the proposed techniques. © 2000 IEEE.

关键词： Data flow analysis

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Single view compositing with shadows

Single view compositing with shadows

引用

13th pacific conference on computer graphics and applications

作者： Cao, XC Shen, YP Shah, M Foroosh, H Univ Cent Florida Sch Comp Sci Orlando FL 32816 USA

In this paper, we describe how geometrically correct and visually realistic shadows may be computed for objects composited into a single view of a target scene. Compared to traditional single view compositing methods, which either do not deal with the shadow effects or manually create the shadows for the composited objects, our approach efficiently utilizes the geometric and photometric constraints extracted from a single target image to synthesize the shadows consistent with the overall target scene for the inserted objects. In particular, we explore (i) the constraints provided by imaged scene structure, e.g. vanishing points of orthogonal directions, for camera calibration and thus explicit determination of the locations of the camera and the light source;(ii) the relatively weaker geometric constraint, the planar homology, that models the imaged shadow relations when explicit camera calibration is not possible;and (iii) the photometric constraints that are required to match the color characteristics of the synthesized shadows with those of the original scene. For each constraint, we demonstrate the working examples followed by our observations. To show the accuracy and the applications of the proposed method, we present the results for a variety of target scenes, including footage from commercial Hollywood movies and 3D video games.

关键词： matting and compositing image-based rendering computer vision shadow matte

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graphics with shape property inheritance

Graphics with shape property inheritance

引用

pacific conference on computer graphics and applications

作者： T.L. Kunii Hosei University Koganei Tokyo Japan

Current graphics models suffer from inconsistencies in many ways. Neither homotopical nor topological properties have been inherited in the shapes of graphical objects in particular, and usually continuity and singularity properties are not inherited either. For example, since the most of the shape modeling in computer graphics has polygonalization as the underlying display structures and data structures, the topological properties as well as the shape smoothness properties and singularities are almost always lost, which makes them unrecoverable. We present initial research on shape modeling for computer graphics to remedy this situation, based on a homotopical framework and cellular spatial structures.

关键词： Shape computer graphics computer displays Clothing industry Technical drawing Textile industry History Cities and towns Digital art Postal services

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Reconfigurable real-time MIMO detector on GPU

Reconfigurable real-time MIMO detector on GPU

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43rd Asilomar conference on Signals, Systems and computers

作者： Wu, Michael Sun, Yang Cavallaro, Joseph R. Electrical and Computer Engineering Rice University Houston TX 77005 United States

ISBN: (纸本)9781424458271

In a high performance multiple-input multiple-output (MIMO) system, a soft output MIMO detector combined with a channel decoder is often used at the receiver to maximize performance gain. Graphic processor unit (GPU) is a low-cost parallel programmable co-processor that can deliver extremely high computation throughput and is well suited for signal processing applications. We propose and implement a novel soft MIMO detection algorithm and show we meet real-time performance while maintaining flexibility using GPU. © 2009 IEEE.

关键词： graphics processing unit

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Machine learning for computer graphics: a manifesto and tutorial

Machine learning for computer graphics: a manifesto and tuto...

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pacific conference on computer graphics and applications

作者： A. Hertzmann University of Toronto Canada

It is argued that computer graphics can benefit from a deeper use of machine learning techniques. The author gives an overview of what learning has to offer the graphics community, with an emphasis on Bayesian techniques. He also attempts to address some misconceptions about learning, and to give a very brief tutorial on Bayesian reasoning.

关键词： Tutorial Machine learning computer graphics Bayesian methods Animation Algorithm design and analysis Machine learning algorithms Uncertainty Art Rendering (computer graphics)

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EasyFace: A realistic face modeling and facial animation authoring system

EasyFace: A realistic face modeling and facial animation aut...

引用

VRCAI 2009: 8th International conference on Virtual Reality Continuum and its applications in Industry

作者： Ye, Yibin Zhang, Mingmin Li, Huansen Jiang, Ruiying Tang, Xing Pan, Zhigeng State Key Lab. of CAD and CG Zhejiang University Hangzhou 310058 China Intel Asia-Pacific Research and Development Ltd. China

ISBN: (纸本)9781605589121

Generating realistic 3D human face models and facial animations have been persistent challenges in computer graphics and computer animation field. We develop a system called EasyFace that constructs textured 3D face models from a single frontal face image with no user interaction. Our system takes frontal face photos with an ordinary camera and automatically generates a realistic 3D human head model which can be animated immediately from customized animation files. With a PC and an ordinary camera, a user can use the system to generate his/her face model and facial animation quickly and expediently. Copyright © 2009 by the Association for Computing Machinery, Inc.

关键词： Cameras

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Rendering in object interference detection on conventional graphics workstations

Rendering in object interference detection on conventional g...

引用

pacific conference on computer graphics and applications

作者： G. Baciu Wingo Sai-Keung Wong Computer Science Department Hong Kong University of Science and Technology Kowloon Hong Kong China

Collision detection between complex objects using rasterizing graphics hardware provides a rich ground of exploration for speeding up the interference detection algorithms and computing points of collision. We show that despite the limitations imposed by the current graphics rendering hardware, it is still possible to perform collision detection at rendering rates using only conventional graphics hardware without any enhancements.

关键词： Rendering (computer graphics) Interference Object detection Workstations Layout Hardware Animation Testing computer graphics Detection algorithms

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Progressive isosurface extraction from tetrahedral meshes

Progressive isosurface extraction from tetrahedral meshes

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pacific conference on computer graphics and applications

作者： U. Labsik P. Kipfer S. Meinlschmidt G. Greiner Computer Graphics Group University of Erlangen Nuremberg Tennenlohe Germany

ISBN: (纸本)0769512275

The authors present a technique for transforming a tetrahedral mesh into a progressive representation based on half edge collapses. This allows the efficient transmission of the mesh from a remote computer where the simulation was computed to a visualization computer. During the transmission, the user can start visualizing while the transmission is still in progress. We show a technique for progressively extracting isosurfaces from the progressive mesh. Starting with the base mesh, an isosurface for a specific value is computed and will locally be improved where a vertex is inserted into the mesh.

关键词： Isosurfaces Computational modeling Workstations computer graphics computer simulation Data mining Concurrent computing Approximation error Data visualization

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RECODE: an image-based collision detection algorithm

RECODE: an image-based collision detection algorithm

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pacific conference on computer graphics and applications

作者： G. Baciu Wingo Sai-Keung Wong Hanqiu Sun Hong Kong University of Science and Technology Kowloon HK

Object interactions are ubiquitous in interactive computer graphics, 3D object motion simulations, virtual reality and robotics applications. Most collision detection algorithms are based on geometrical object space interference tests. Some algorithms have employed an image space approach to the collision detection problem. We demonstrate an image space collision detection process that allows substantial computational savings during the image space interference test. This approach makes efficient use of the graphics rendering hardware for real time complex object interactions.

关键词： Detection algorithms Interference Testing computer graphics Computational modeling computer simulation Virtual reality Orbital robotics Application software Pervasive computing

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