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Displaying 1-29 out of 29 total
Dense 3D Reconstruction with an Uncalibrated Stereo System using Coded Structured Light
Found in: Computer Vision and Pattern Recognition Workshop
By Ryo Furukawa, Hiroshi Kawasaki
Issue Date:June 2005
pp. 107
<p>In this paper, we describe a new uncalibrated active vision system. Normally, active vision systems need either precise calibrations or relatively fixed cameras and light sources, which require 3D measurement systems to make use of complicated mea...
 
One-Shot Entire Shape Scanning by Utilizing Multiple Projector-Camera Constraints of Grid Patterns
Found in: 2013 IEEE International Conference on Computer Vision Workshops (ICCVW)
By Nozomu Kasuya,Ryusuke Sagawa,Ryo Furukawa,Hiroshi Kawasaki
Issue Date:December 2013
pp. 299-306
This paper proposes a method to reconstruct the entire shape of moving objects by using multiple cameras and projectors. The projectors simultaneously cast static grid patterns of wave lines. Each of the projected patterns is a single-colored pattern of ei...
 
Grid-Based Active Stereo with Single-Colored Wave Pattern for Dense One-shot 3D Scan
Found in: 2012 Second International Conference on 3D Imaging, Modeling, Processing, Visualization and Transmission (3DIMPVT)
By Ryusuke Sagawa,Kazuhiro Sakashita,Nozomu Kasuya,Hiroshi Kawasaki,Ryo Furukawa,Yasushi Yagi
Issue Date:October 2012
pp. 363-370
In this paper, we propose a method to reconstruct the shapes of moving objects. The proposed method is a projector-camera system that reconstructs a shape from a single image where a static pattern is cast by a projector, such a method is ideal for acquisi...
 
Dense one-shot 3D reconstruction by detecting continuous regions with parallel line projection
Found in: Computer Vision, IEEE International Conference on
By Ryusuke Sagawa,Hiroshi Kawasaki,Shota Kiyota,Ryo Furukawa
Issue Date:November 2011
pp. 1911-1918
3D scanning of moving objects has many applications, for example, marker-less motion capture, analysis on fluid dynamics, object explosion and so on. One of the approach to acquire accurate shape is a projector-camera system, especially the methods that re...
 
A System for Capturing Textured 3D Shapes Based on One-Shot Grid Pattern with Multi-band Camera and Infrared Projector
Found in: 3D Imaging, Modeling, Processing, Visualization and Transmission, International Conference on
By Kazuhiro Sakashita,Yasushi Yagi,Ryusuke Sagawa,Ryo Furukawa,Hiroshi Kawasaki
Issue Date:May 2011
pp. 49-56
Recently, several method have been proposed to capture 3D shapes of a moving object at a high frame rate. One of promising approach to reconstruct a 3D shape is a projector-camera system that projects structured light pattern. One of the problem of this ap...
 
One-shot Entire Shape Acquisition Method Using Multiple Projectors and Cameras
Found in: Image and Video Technology, Pacific-Rim Symposium on
By Ryo Furukawa, Ryusuke Sagawa, Hiroshi Kawasaki, Kazuhiro Sakashita, Yasushi Yagi, Naoki Asada
Issue Date:November 2010
pp. 107-114
In this paper, we propose an active scanning system using multiple projectors and cameras to acquire a dense entire shape of the object with a single scan (a.k.a. ones hot scan). One of the potential application of the system is to capture a moving object ...
 
The Schemes to Develop Dependable System Using COTS
Found in: Pacific Rim International Symposium on Dependable Computing, IEEE
By Koji Tomita, Kazunori Fujiwara, Hiroshi Kawasaki, Naoki Miwa, Satoru Nagai
Issue Date:December 2008
pp. 32-39
This paper provides general design schemes for the dependable system especially long-term projects using Commercial Off The Shelf (COTS) computers based on the concept we established for dependability. As computer technology has shown significantly rapid p...
 
A Tourist Route Search System Based on Web Information and the Visibility of Scenic Sights
Found in: Universal Communication, International Symposium on
By Jianwei Zhang, Hiroshi Kawasaki, Yukiko Kawai
Issue Date:December 2008
pp. 154-161
With the growth of massive information on the Web, information recommendation and filtering techniques have been studied intensively.Traditional route search systems, which can be considered one of information recommendation systems, usually calculate the ...
 
Dynamic scene shape reconstruction using a single structured light pattern
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Hiroshi Kawasaki, Ryo Furukawa, Ryusuke Sagawa, Yasushi Yagi
Issue Date:June 2008
pp. 1-8
3D acquisition techniques to measure dynamic scenes and deformable objects with little texture are extensively researched for applications like the motion capturing of human facial expression. To allow such measurement, several techniques using structured ...
 
Shape-merging and interpolation using class estimation for unseen voxels with a GPU-based efficient implementation
Found in: 3D Digital Imaging and Modeling, International Conference on
By Ryo Furukawa, Tomoya Itano, Akihiko Morisaka, Hiroshi Kawasaki
Issue Date:August 2007
pp. 289-296
The merging of multiple range images obtained by 3D measurement systems for generating a single polygon mesh, and processing for filling holes caused by unmeasured data or insufficient range images are essential processes for CAD, digital archiving of shap...
 
Dense 3D Reconstruction method using Coplanarities and Metric Constraints for Line Laser Scanning
Found in: 3D Digital Imaging and Modeling, International Conference on
By Hiroshi Kawasaki, Ryo Furukawa
Issue Date:August 2007
pp. 149-158
In this paper, we propose a novel method to achieve both dense 3D reconstruction of the scene and estimation of the camera intrinsic parameters by using coplanarities and other constraints (e.g. orthogonalities or parallelisms) derived from relations betwe...
 
3D acquisition system using uncalibrated line-laser projec
Found in: Pattern Recognition, International Conference on
By Hiroshi Kawasaki, Ryo Furukawa, Yasuaki Nakamura
Issue Date:August 2006
pp. 1071-1075
In this paper, we propose a new 3D scanner, which is easy to operate. Till date several 3D scanners, including commercial products, are available; however, most of these are usually large, heavy, and expensive. Although inexpensive 3D scanners manufactured...
 
Space-time Analysis of Spherical Projection Image
Found in: Pattern Recognition, International Conference on
By Shintaro Ono, Takeshi Mikami, Hiroshi Kawasaki, Katsushi Ikeuchi
Issue Date:August 2006
pp. 975-979
In this paper, a novel analysis of space-time volume of spherical projection image is presented. So far, space-time analyses have been extensively conducted for various purposes, i.e. 3-D reconstruction, estimation of camera motion and novel view synthesis...
 
Self-Calibration of Multiple Laser Planes for 3D Scene Reconstruction
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Ryo Furukawa, Hiroshi Kawasaki
Issue Date:June 2006
pp. 200-207
Self-calibration is one of the most active issues concerning vision-based 3D measurements. However, in the case of the light sectioning method, there has been little research conducted on self-calibration techniques. In this paper, we study the problem of ...
 
Driving View Simulation Synthesizing Virtual Geometry and Real Images in an Experimental Mixed-Reality Traffic Space
Found in: Mixed and Augmented Reality, IEEE / ACM International Symposium on
By Shintaro Ono, Koichi Ogawara, Masataka Kagesawa, Hiroshi Kawasaki, Masaaki Onuki, Ken Honda, Katsushi Ikeuchi
Issue Date:October 2005
pp. 214-215
We propose an efficient and effective image generation system for an experimental mixed-reality traffice space. Our enhanced traffic/driving simulation system represents the view through a hybrid that combines virtual geometry with real images to realize h...
   
Uncalibrated Multiple Image Stereo System with Arbitrarily Movable Camera and Projector for Wide Range Scanning
Found in: 3D Digital Imaging and Modeling, International Conference on
By Ryo Furukawa, Hiroshi Kawasaki
Issue Date:June 2005
pp. 302-309
In this paper, we propose an uncalibrated, multi-image 3D reconstruction, using coded structured light. Normally, a conventional coded structured light system consists of a camera and a projector and needs precalibration before scanning. Since the camera a...
 
Entire Model Acquisition System using Handheld 3D Digitizer
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Hiroshi Kawasaki, Ryo Furukawa
Issue Date:September 2004
pp. 478-485
In this paper, a real-time, handheld 3D model acquisition system consisting of a laser projector, a video camera and a turntable is described. The user projects a stripe of light at the 3D object by hand while rotating the object on a turntable. The projec...
 
Interactive Shape Acquisition using Marker Attached Laser Projector
Found in: 3D Digital Imaging and Modeling, International Conference on
By Ryo Furukawa, Hiroshi Kawasaki
Issue Date:October 2003
pp. 491
In this paper, a 3D shape acquisition system consisting of a laser projector and a video camera is described. A user projects a stripe of light to the measured 3D scene by hand. The projected light and LED markers attached to the laser projector are captur...
 
Light Field Rendering for Large-Scale Scenes
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi
Issue Date:December 2001
pp. 64
In this paper, we present an efficient method to synthesize large-scale scenes, such as broad city landscapes. To date, model based approaches have mainly been adopted for this purpose, and some fairly convincing polygon cities have been successfully gener...
 
Expanding Possible View Points of Virtual Environment Using Panoramic Images
Found in: Pattern Recognition, International Conference on
By Takuji Takahashi, Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi
Issue Date:September 2000
pp. 4468
This paper presents a new method for creating a 3D virtual broad city environment with walk-through systems based on Image-Based Rendering (IBR). In that virtual city, people can move rather freely and look at arbitrary views. The strength of our method is...
 
EPI Analysis of Omni-Camera Image
Found in: Pattern Recognition, International Conference on
By Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi
Issue Date:September 2000
pp. 1379
This paper describes an efficient method to obtain 3D information from omni images using EPI analysis. Two types of omni cameras are employed to make a spatio-temporal volume, which is a sequence of omni images stacked in the spatio-temporal space. For the...
 
Interactive Video Description on the Network
Found in: Multimedia Computing and Systems, International Conference on
By Tomoyuki Yatabe, Hiroshi Kawasaki, Masao Sakauchi
Issue Date:June 1999
pp. 194
Owing to the recent development of digital broadcasting technology such as Satellite, CATV, the Internet and the expansion of the network systems, the amount of video data we can obtain is increasing day by day. In this paper, we propose Advanced Database ...
 
Dense 3D Reconstruction from High Frame-Rate Video Using a Static Grid Pattern
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Ryusuke Sagawa,Ryo Furukawa,Hiroshi Kawasaki
Issue Date:September 2014
pp. 1733-1747
Dense 3D reconstruction of fast moving objects could contribute to various applications such as body structure analysis, accident avoidance, and so on. In this paper, we propose a technique based on a one-shot scanning method, which reconstructs 3D shapes ...
 
Projector camera system for realtime 3D scanning
Found in: Proceedings of the 5th ACM/IEEE International Workshop on Projector camera systems (PROCAMS '08)
By Hiroshi Kawasaki, Inose Kenji, Ryo Furukawa, Ryusuke Sagawa, Toshihiro Kawasaki, Yasushi Yagi
Issue Date:August 2008
pp. 63-68
An active 3D scanning device which can capture a sequential motion in realtime is strongly demanded for 3D display and other VR systems. Since most previous and commercial products basically recover the shape with a point or a line for each scan, fast moti...
     
Arbitrary View Position and Direction Rendering for Large-Scale Scenes
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Takuji Takahashi, Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi
Issue Date:June 2000
pp. 2296
This paper presents a new method for rendering views, especially those of large-scale scenes, such as broad city landscapes. The main contribution of our method is that we are able to easily render any view from an arbitrary point to an arbitrary direction...
 
Spatio-Temporal Analysis of Omni Image
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi
Issue Date:June 2000
pp. 2577
This paper describes an efficient method to obtain 3D information by using spatio-temporal analysis of omni images for outdoor navigation and map-making in the intelligent transportation system (ITS) application. Two types of omni-directional cameras are e...
 
A facial tracking and transfer method with a key point refinement
Found in: ACM SIGGRAPH 2013 Posters (SIGGRAPH '13)
By Hiroshi Kawasaki, Koichi Ogawara, Ryo Furukawa, Ryusuke Sagawa, Yasuhiro Akagi
Issue Date:July 2013
pp. 1-1
We propose a key point detection and refinement method for a facial motion tracking and transfer. Since key-point-based approaches for representing facial expressions usually deform faces by interpolating movements of the key points, the approaches cause e...
     
Shape rank: efficient web3D search technique using 3D features
Found in: Proceedings of the international conference on Multimedia information retrieval (MIR '10)
By Hiroshi Kawasaki, Masahiro Ishikawa, Ryo Furukawa, Yukiko Kawai
Issue Date:March 2010
pp. 393-396
In recent years, usage of 3D object for various purposes, such as CG movie, games, web 3D and so on, is rapidly increasing. In addition, 3D shape capturing method is also improved and many commercial products are now widely available. As a result, a number...
     
Automatic modeling of a 3D city map from real-world video
Found in: Proceedings of the seventh ACM international conference on Multimedia (Part 1) (MULTIMEDIA '99)
By Hiroshi Kawasaki, Katsushi Ikeuchi, Masao Sakauchi, Tomoyuki Yatabe
Issue Date:October 1999
pp. 11-18
Mixed reality (MR) systems which integrate the virtual world and the real world have become a major topic in the research area of multimedia. As a practical application of these MR systems, we propose an efficient method for making a 3D map from real-world...
     
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