Single-shot Accurate 3D Reconstruction Using Structured Light Systems Based on Local Optimization

Single-shot Accurate 3D Reconstruction Using Structured Light Systems Based on Local Optimization PDF Author: Neda Aslsabbaghpourhokmabadi
Publisher:
ISBN:
Category : Computer drawings
Languages : en
Pages : 80

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Book Description
Creating 3D models of objects has been studied extensively for several decades. These models have different applications in different fields. As a result, creating 3D models is an interesting area in computer vision. There are many proposed methods for extracting 3D information of 2D images. One of the most common methods for 3D reconstruction is structured light methods. Although structured light methods can get valuable results of 3D reconstruction, they have limitations. For example, the structured light methods can get dense results on static scenes or get sparse results on dynamic scenes. In static scenes, the structured light method projects several patterns, and it results in dense models. However, in dynamic scenes, the structured light method projects just one pattern since the object is moving, and it results in sparse models. The limitation of the structured light methods in dynamic scenes is the most important motivation for this thesis. In this thesis, a single-shot structured light method is developed to overcome the sparse results in dynamic scenes. In particular, the proposed method can obtain more accurate reconstruction with just one image of dynamic scenes than that of existing methods. The new method applies global and local optimizations to establish dense correspondences. The result of simulated experiments comparison with the ground truth demonstrates that the proposed method in this thesis achieves more accurate results than that of previous methods. Lastly, the technique developed in this thesis is applied to real data in order to obtain high quality 3D reconstruction results. The results of the new method are more accurate compared to previous methods.

Single-shot Accurate 3D Reconstruction Using Structured Light Systems Based on Local Optimization

Single-shot Accurate 3D Reconstruction Using Structured Light Systems Based on Local Optimization PDF Author: Neda Aslsabbaghpourhokmabadi
Publisher:
ISBN:
Category : Computer drawings
Languages : en
Pages : 80

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Book Description
Creating 3D models of objects has been studied extensively for several decades. These models have different applications in different fields. As a result, creating 3D models is an interesting area in computer vision. There are many proposed methods for extracting 3D information of 2D images. One of the most common methods for 3D reconstruction is structured light methods. Although structured light methods can get valuable results of 3D reconstruction, they have limitations. For example, the structured light methods can get dense results on static scenes or get sparse results on dynamic scenes. In static scenes, the structured light method projects several patterns, and it results in dense models. However, in dynamic scenes, the structured light method projects just one pattern since the object is moving, and it results in sparse models. The limitation of the structured light methods in dynamic scenes is the most important motivation for this thesis. In this thesis, a single-shot structured light method is developed to overcome the sparse results in dynamic scenes. In particular, the proposed method can obtain more accurate reconstruction with just one image of dynamic scenes than that of existing methods. The new method applies global and local optimizations to establish dense correspondences. The result of simulated experiments comparison with the ground truth demonstrates that the proposed method in this thesis achieves more accurate results than that of previous methods. Lastly, the technique developed in this thesis is applied to real data in order to obtain high quality 3D reconstruction results. The results of the new method are more accurate compared to previous methods.

One-shot Pattern Projection for Dense and Accurate 3D Reconstruction in Structured Light

One-shot Pattern Projection for Dense and Accurate 3D Reconstruction in Structured Light PDF Author: Sergio Fernández Navarro
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description


A Structured Light Based 3D Reconstruction Using Combined Circular Phase Shifting Patterns

A Structured Light Based 3D Reconstruction Using Combined Circular Phase Shifting Patterns PDF Author: Yujia Zhang
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 121

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Book Description
Coded structured light is one of the most effective and reliable techniques for surface reconstruction. With a calibrated projector-camera stereo system, a set of illuminating patterns are projected onto the scene by projector and the image is captured by the camera. The correspondences between projector and camera frames are calculated in the decoding process, which is used for triangulation and point cloud generation. Continuous phase shifting method is a well-known fringe projection technique for 3D scanning. A set of sinusoidal patterns showing variation of intensity or color are projected onto the surface. This proposal, introduces a novel circular phase shifting method to improve the decoding accuracy, without the trade-off between the processing speed and decoding accuracy. In the proposed approach, three-step circular phase shifting and absolute patterns are used for increasing the multiplicity since the circular patterns are coded in all directions. The stereo triangulation is more stable and accurate than line-plane intersection used in single axis structured light methods by reducing incorrect decoding errors. Robust gray patterns are applied to resolve the ambiguity resolution caused by reflectance discontinuities in the phase shifting decoding process.

Robust Single-shot Structured Light 3D Scanning

Robust Single-shot Structured Light 3D Scanning PDF Author: Christoph Schmalz
Publisher:
ISBN:
Category :
Languages : en
Pages : 168

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Book Description


A NURBS Based 3D Object Reconstruction Using Colour-coded Structured Light

A NURBS Based 3D Object Reconstruction Using Colour-coded Structured Light PDF Author: Philippe Lavoie
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages : 394

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Book Description


Computer Vision – ECCV 2018

Computer Vision – ECCV 2018 PDF Author: Vittorio Ferrari
Publisher: Springer
ISBN: 3030012492
Category : Computers
Languages : en
Pages : 880

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Book Description
The sixteen-volume set comprising the LNCS volumes 11205-11220 constitutes the refereed proceedings of the 15th European Conference on Computer Vision, ECCV 2018, held in Munich, Germany, in September 2018.The 776 revised papers presented were carefully reviewed and selected from 2439 submissions. The papers are organized in topical sections on learning for vision; computational photography; human analysis; human sensing; stereo and reconstruction; optimization; matching and recognition; video attention; and poster sessions.

Advances in Visual Computing

Advances in Visual Computing PDF Author: George Bebis
Publisher: Springer
ISBN: 3642331793
Category : Computers
Languages : en
Pages : 769

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Book Description
The two volume set LNCS 7431 and 7432 constitutes the refereed proceedings of the 8th International Symposium on Visual Computing, ISVC 2012, held in Rethymnon, Crete, Greece, in July 2012. The 68 revised full papers and 35 poster papers presented together with 45 special track papers were carefully reviewed and selected from more than 200 submissions. The papers are organized in topical sections: Part I (LNCS 7431) comprises computational bioimaging; computer graphics; calibration and 3D vision; object recognition; illumination, modeling, and segmentation; visualization; 3D mapping, modeling and surface reconstruction; motion and tracking; optimization for vision, graphics, and medical imaging, HCI and recognition. Part II (LNCS 7432) comprises topics such as unconstrained biometrics: advances and trends; intelligent environments: algorithms and applications; applications; virtual reality; face processing and recognition.

Consolidated Water Rates

Consolidated Water Rates PDF Author: U.S. Environmental Protection Agency
Publisher: BiblioGov
ISBN: 9781249564607
Category :
Languages : en
Pages : 126

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Book Description
The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.

Time-of-Flight and Structured Light Depth Cameras

Time-of-Flight and Structured Light Depth Cameras PDF Author: Pietro Zanuttigh
Publisher: Springer
ISBN: 3319309730
Category : Computers
Languages : en
Pages : 360

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Book Description
This book provides a comprehensive overview of the key technologies and applications related to new cameras that have brought 3D data acquisition to the mass market. It covers both the theoretical principles behind the acquisition devices and the practical implementation aspects of the computer vision algorithms needed for the various applications. Real data examples are used in order to show the performances of the various algorithms. The performance and limitations of the depth camera technology are explored, along with an extensive review of the most effective methods for addressing challenges in common applications. Applications covered in specific detail include scene segmentation, 3D scene reconstruction, human pose estimation and tracking and gesture recognition. This book offers students, practitioners and researchers the tools necessary to explore the potential uses of depth data in light of the expanding number of devices available for sale. It explores the impact of these devices on the rapidly growing field of depth-based computer vision.

Structured Lighting Stereoscopy with Marching Pseudo-random Patterns

Structured Lighting Stereoscopy with Marching Pseudo-random Patterns PDF Author: Danick Desjardins
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 278

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Book Description