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3D Imaging (IC3D), 2011 International Conference on

Date 7-8 Dec. 2011

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Displaying Results 1 - 25 of 36
  • Call for papers (long version)

    Publication Year: 2011 , Page(s): 1 - 5
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    Freely Available from IEEE
  • Call for papers (short version)

    Publication Year: 2011 , Page(s): 1
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 2011 , Page(s): 1 - 6
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    Freely Available from IEEE
  • The floating window, its benefits, methods, requirements

    Publication Year: 2011 , Page(s): 1 - 3
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3788 KB)  

    Floating window means projecting the window ahead from the screen. Benefits, methods, requirements for comfortable viewing conditions, are reviewed. View full abstract»

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  • Enhanced rate-distortion optimization for stereo interleaving video coding

    Publication Year: 2011 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (683 KB)  

    Stereo interleaving format attracts more and more attention due to its back compatibility with all existing 2D video coding standards as well as its high efficiency of stereoscopic video compression. As one of the most significant coding components, rate-distortion optimization (RDO) in stereo interleaving video coding does not take into account its application scenarios where the reconstructed video needs up-sampling for displaying. To promote the efficiency of stereo interleaving video compression, we propose an enhanced RDO where the up-sampling is taken into consideration on distortion measurement. The proposed algorithm changes nothing concerning the syntax and is compatible with current decoders. Experimental results demonstrate that the proposed enhanced RDO is able to reduce the bitrates by 10%-44% on average, and achieve 0.1-0.65dB gain on PSNR compared with conventional RDO. View full abstract»

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  • Stereo image rectification algorithm for multi-view 3D display

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1335 KB)  

    This paper introduces a stereo image rectification algorithm based on image feature points for multi-view three-dimension (3D) display system. First, we mark the feature points in multi-view images, and calculate the rectification parameters. Then we use these parameters for rotating image and shifting image in vertical direction in order to eliminate the vertical parallax of multi-view images. Finally according to zero-parallax setting (ZPS), we adjust the horizontal parallax to get a better stereo image for multi-view 3D display. After the multi-view information is corrected, the stereo effect has been greatly enhanced in multi-view display system. The algorithm has low complexity in real-time 3D system and can improve the stereo image from the point of the observer. View full abstract»

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  • Parallel implementation of depth-image-based rendering

    Publication Year: 2011 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (654 KB)  

    Depth-image-based rendering (DIBR) is a key step in 3D video generation. Parallel implementation of DIBR is able to improve rendering efficiency. General DIBR algorithms include two steps: pixel shifting (warping) and hole filling. There are memory correlations in these steps. To minimize memory conflict, we employ an auxiliary matrix to record maximum shifting distance. Implementation details on OpenMP and CUDA are presented and experimental results on GPU and multi-core CPU are compared. View full abstract»

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  • Tridimensional laser scanning to retrieve engineering site drawings. The experience of the Brussels Park bunker rehabilitation project

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5689 KB)  

    A project aims to rehabilitate the Brussels Park bunker. The objective is to transform a disused place in a high-tech center according to current construction standards. Thus it is essential to base the rehabilitation strategy on correct plans. The original plans, dating from 1939, have been partially retrieved. However, they are incomplete and do not consider the transformations made over time. A topographic survey has produced a preliminary plan, but it contains inconsistencies in both geometry and disposition of the different rooms. To obtain documentation and measurements, a survey was carried out using a 3D laser scanner. In addition to complete plans, this work accumulated necessary information for virtual visits. Different processings were applied on data to obtain detailed plans, confirming the inconsistencies identified in 2010. This paper includes the results obtained and highlights added values of 3D scanning for recovering plans of existing structures. View full abstract»

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  • Geometrical 3D reconstruction using real-time RGB-D cameras

    Publication Year: 2011 , Page(s): 1 - 8
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7799 KB)  

    A RGB-D image combines, for each pixel, the classical three color channels with a fourth channel providing depth information. Devices that produce RGB-D images in real time with a rather good resolution are currently available on the market. With this type of device, it is possible to acquire and to process, in real time, 3D textured information, paving the way for numerous applications in the field of computer imaging and vision. In this paper, we analyse the accuracy of a low cost system and we see how this kind of device and the RGB-D images it produces allow us to acquire 3D models of real objects. A first application is presented that combines multiple RGB-D images of a static scene, taken from different viewpoints, in order to reconstruct a complete 3D model of the scene. A second application combines on-the-fly RGB-D images coming from multiple devices, generating a 3D model where the problems of occlusions inherent in monocular observations are drastically reduced. View full abstract»

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  • HELIUM3D: A laser-scanned head-tracked autostereoscopic display

    Publication Year: 2011 , Page(s): 1 - 8
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2190 KB)  

    This paper describes the development of an autostereoscopic laser-based display that can serve several users who are able to move freely over a large area; it is intended for television applications and operates by tracking the positions of the viewers' heads and directing regions referred to as exit pupils towards their eyes. An exit pupil is a region where either a left or a right image is seen across the complete area of the screen. A description of the 60 and 120Hz prototypes developed is given. A set-up that does not show images but demonstrates the operation of the novel dynamic exit pupil formation system is also described, View full abstract»

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  • Multi-view photometric stereo of non-Lambertian surface under general illuminations

    Publication Year: 2011 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1494 KB)  

    We present an approach to reconstruct 3D fine-scale surface models for non-Lambertian objects from multi-view multi-illumination image sets. Unlike most previous work in photometric stereo, this approach works for general lighting conditions, i.e. natural outdoor illumination. Our method begins with a raw 3D model reconstructed from available multi-view stereo techniques. Considering the sparse characteristics of surface reflectance in the view-illumination space, we first estimate the diffuse appearance of the 3D model from the multiview captured images, and then refine it using the surface appearance under varying illuminations. With the separated low rank diffuse component, we exploit the photometric cues to recover detailed surface structure. Experimental results on various real world scenes validate that the proposed method is able to handle surfaces with specular reflectance even including saturated colours, highlight and cast-shadows. View full abstract»

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  • A compact 3D representation for multi-view video

    Publication Year: 2011 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4269 KB)  

    This paper presents a methodology for obtaining a 3D reconstruction of a dynamic scene in multi-camera settings. Our target is to derive a compact representation of the 3D scene which is effective and accurate, whatever the number of cameras and even for very-wide baseline settings. Easing real-time 3D scene capture has outstanding applications in 2D and 3D content production, free viewpoint video of natural scenes and interactive video applications. View full abstract»

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  • Educational benefits of stereoscopic visualization from multiple viewpoints, illustrated with an electrical motor model

    Publication Year: 2011 , Page(s): 1 - 5
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1198 KB)  

    In this study, we created a three-dimensional (3D) model of a simplified direct current (DC) motor and used it to explain the mechanism of actual DC motors to junior high school science classes. We implemented a questionnaire for students before and after the presentation of the model. Before the presentation, many students were not confident about explaining the mechanism of a DC motor based on Fleming's left-hand rule. Then, we showed the stereoscopic display of our DC motor model from various viewpoints and explained the application of Fleming's left-hand rule. The results of the questionnaire suggested that students gained confidence in explaining the application after viewing the stereoscopic display. It was suggested that the change of viewpoint in the stereoscopic display was effective in improving their understanding. View full abstract»

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  • Depth and texture imaging using time-varying color structured lights

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1090 KB)  

    In this paper, a depth and texture imaging method using time-varying color structured lights is introduced. Three structured patterns are periodically projected on a scene and captured with our system to produce depth and texture images simultaneously. The color difference between three patterns is used to identify the projected pattern's color, and the texture image can be simultaneously obtained by adding the colors of the patterned images. The experimental results show that the proposed method is suitable for depth and texture imaging for static and slow moving objects. View full abstract»

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  • Animation of 3D characters from single depth camera

    Publication Year: 2011 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1192 KB)  

    As the development of depth acquisition techniques, in recent years, depth cameras achieve to obtain depth maps in real time. In this work, by using a single depth camera, we propose a method to transfer 3D motion of a performer to another character (avatars or other human characters). We capture the motion of a performer by a Kinect camera, which outputs the 3D positions of 15 joints of the performer for each frame. Even though the joints positions are quite noisy and with errors in some frames, our method achieves to calculate joints' rotations with spatial and temporal consistency and transfer the motion to a target skeleton. By using a skinning technique, the captured skeleton motion drives the target 3D model which performs the same motion with the captured performer. View full abstract»

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  • A visual hull free algorithm for fast and robust multi-view stereo

    Publication Year: 2011 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1342 KB)  

    An image based multi-view reconstruction system, fast and robust, is introduced in this article. Instead of using visual hull as input, multi-view images are directly used to generate a precise and watertight 3D model. At the same time, point cloud and visual hull can also be produced as by-products. Our system is made up of three stages: point cloud generation, fusion and meshing. With well-designed algorithm and data structure, state-of-the-art speed is achieved in this highly reliable system, as revealed in our comparison with related work. View full abstract»

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  • Transforming 3D cinema content for an enhanced 3DTV experience

    Publication Year: 2011 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1842 KB)  

    3D cinema and 3DTV are at two different levels in the screen size spectrum. When the same stereoscopic-3D content is viewed on a cinema screen and 3DTV screen, it will produce a different 3D impression. As a result, it is difficult to fulfill the requirements of 3DTV with content captured for 3D cinema. Thus, it is important to properly address the issue of 3DTV content creation to avoid possible delays in the deployment of 3DTV. In this paper, we first explore the effects of using the same content for 3D cinema and 3DTV and then analyze the performance of several disparity based transformations for 3D cinema to 3DTV content conversion, by subjective testing. Effectiveness of the transformations is analyzed in terms of both depth quality and visual comfort of 3D experience. We show that by using a simple shift-based disparity transformation technique, it is possible to enhance the 3DTV experience from a common input signal which is originally captured for cinema viewing. View full abstract»

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  • 3D holographic video system

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1824 KB)  

    Device for presenting 3D animated images, obtained by taking pictures through a diffraction grating, from all size objects, and a projection onto a holographic screen. The diffraction, orientated horizontally, gets by each ray of light a way done which depends on its wavelength and allows to obtain as many angles of vision as wavelengths. The screen diffracts horizontally and works as a complex lens reconstituing an integral 3D effect. Each pixel of the recording support realises a spectrum analysis and, at the time of the projection, return the information. With three recording supports, RGB natural colours are obtained. The data are converted into digital form. The data processing allows to create synthetic three-dimentional images. View full abstract»

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  • A digital 3D signage system and its effect on customer behavior

    Publication Year: 2011 , Page(s): 1 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (772 KB)  

    The use of digital signs simplifies distribution. Importantly, it draws more attention than static signs. A way to increase attention is to add an experienced depth. The paper discusses possible alternatives for extending an existing digital signage system to display stereoscopic 3D contents, comparing a decentralized distribution solution and a centralized solution. A functional prototype system was implemented. A new 3D player was developed to render views from different formats. The implemented system was used to study customer behavior when exposed to digital stereoscopic 3D signage in a direct sales situation. The proportion of sales of selected products related to the total number of sold products varied approximately equally before and during tests. An interview study suggests that the sign did not interact with customer decisions: customers were lost at different stages in this series of steps, among others the sign placement. View full abstract»

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  • Efficient aggregation via iterative block-based adapting support-weights

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1388 KB)  

    Local stereo matching algorithms based on adapting-weights aggregation produce excellent results compared to other local methods. In particular, they produce more accurate results near disparity edges. This improvement is obtained thanks to the fact that the support for each pixel is accurately determined based on information such as colour or spatial distance. However, the computation of the support for each pixel results in computationally complex algorithms, especially when using large aggregation windows. Iterative aggregation schemes are a potential alternative to using large windows. In this paper we propose a novel iterative approach for adapting-weights aggregation which produces better results and out-performs most previous adapting-weights methods. View full abstract»

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  • A 2D-to-3D chip and its application to TV systems

    Publication Year: 2011 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1360 KB)  

    In this paper, we design a real-time 2D to 3D conversion chip. Architecture of this chip includes three key modules: 2D to 3D conversion core, 3D format conversion and peripheral I/O circuit. Specially, calculation precision and smooth filter are carefully designed and implemented according to the features of chip, such that the quality of output 3D video is largely improved. The experiment results on the prototypes show that our chip can give promising conversion results and has a broad application foreground. View full abstract»

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  • Study of asymmetric quality between coded views in depth-enhanced multiview video coding

    Publication Year: 2011 , Page(s): 1 - 8
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (674 KB)  

    Depth-enhanced multiview video formats, such as the multiview video plus depth (MVD) format, enable a natural 3D visual experience which cannot be brought by traditional 2D or stereo video services. In this paper we studied an asymmetric MVD technique for coding of three views that enabled rendering of the same bitstream on stereoscopic displays and multiview autostereoscopic displays. A larger share of bitrate was allocated to a central view, whereas two side views were coded at lower quality. The three decoded views were used by a Depth-Image-Based Rendering algorithm (DIBR) to produce virtual intermediate views. A stereopair at a suitable separation for viewing on a stereoscopic display was selected among the synthesized views. A large-scale subjective assessment of the selected synthesized stereopair was performed. A bitrate reduction of 20% on average and up to 22% was achieved with no penalties on subjective perceived quality. In addition, our analysis shows that a similar bitrate reduction gain with no difference in subjective quality can be achieved in multiview autostereoscopic display scenario. View full abstract»

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  • Obvious: A system to explore alignment techniques and visualization of 3D views

    Publication Year: 2011 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4710 KB)  

    3D reconstruction from partial views is one of the best practices for obtaining 3D models. It provides feedback to developers of digitalizers regarding views acquisition accuracy, and its practice reduces the cost compared to full acquisition systems. One further benefit is a testbed and research tool for 3D alignment techniques. We propose a system, called Obvious, which is designed as a modular, open source C++ coding, portable to unix like or windows systems, with friendly interface and state of the art 3D alignment techniques such as 4PCS, D4PCS, and ICP. The system also brings modules for including and modifying noise and perturbation to 3D data to help evaluate alignment quality such as accuracy, robustness, and efficiency. As a 3D reconstruction and research system Obvious has algorithms and tools originally provided in one open source tool for 3D enthusiasts. View full abstract»

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  • Tao, a 3D dynamic document description language

    Publication Year: 2011 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4740 KB)  

    Tao Presentations uses a dialect of the XL programming language to describe interactive multimedia 3D documents. This approach makes it easy to create 3D contents that can be used to present information, to visualize scientific data or to explore stereoscopic or auto-stereoscopic effects rapidly. The demands of an interactive, real-time environment have created a number of interesting challenges for us to solve, ranging from language expressiveness and document semantics to graphics performance and rendering quality. View full abstract»

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  • A fast segmentation-driven algorithm for accurate stereo correspondence

    Publication Year: 2011 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1049 KB)  

    Recent cost aggregation strategies that adapt their weights to image content enabled local algorithms to obtain results comparable to those of global algorithms based on more complex disparity optimization methods. Unfortunately, despite the potential advantages in terms of memory footprint and algorithmic simplicity compared to global algorithms, most of the state-of-the-art cost aggregation strategies deployed in local algorithms are extremely slow. In fact, their execution time is comparable and often worse than those of global approaches. In this paper we propose a framework for accurate and fast cost aggregation based on segmentation that allows us to obtain results comparable to state-of-the-art approaches much more efficiently (the execution time drops from minutes to seconds). A further speed-up is achieved taking advantage of multi-core capabilities available nowadays in almost any processor. The comparison with state-of-the-art cost aggregation strategies highlights the effectiveness of our proposal. View full abstract»

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