Efficient rate-distortion compression of dynamic point cloud for grid-pattern-based 3D scanning systems

3D Research ◽  
2012 ◽  
Vol 3 (1) ◽  
Author(s):  
Ismael Daribo ◽  
Ryo Furukawa ◽  
Ryusuke Sagawa ◽  
Hiroshi Kawasaki ◽  
Shinsaku Hiura ◽  
...  
Keyword(s):  
Point Cloud ◽  
Rate Distortion ◽  
3D Scanning ◽  
Grid Pattern ◽  
Scanning Systems

Point cloud compression for grid-pattern-based 3D scanning system

2011 ◽  
Author(s):  
I. Daribo ◽  
R. Furukawa ◽  
R. Sagawa ◽  
H. Kawasaki ◽  
S. Hiura ◽  
...  
Keyword(s):  
Point Cloud ◽  
3D Scanning ◽  
Scanning System ◽  
Grid Pattern

Evaluation of New In-Ditch Methods for Measurement and Assessment of External Corrosion

2014 ◽  
Author(s):  
Pablo Cazenave ◽  
Katina Tiñacos ◽  
Ming Gao ◽  
Richard Kania ◽  
Rick Wang
Keyword(s):  
New Technologies ◽  
3D Scanning ◽  
Primary Objective ◽  
Scanning System ◽  
Calculation Methods ◽  
Integrity Assessment ◽  
External Corrosion ◽  
Non Destructive ◽  
Scanning Systems ◽  
Inspection Performance

New technologies for in-ditch non-destructive evaluation were lately developed and are becoming of mainstream use in the evaluation of external corrosion features for both In-Line-Inspection performance evaluation and pipeline integrity assessment. However, doubt was cast about the reliability and repeatability of these new technologies (hardware and processing software) when compared with those used in the traditional external-corrosion in-ditch measurement and the reliability of the pipeline integrity assessment calculations (PBurst) embedded in their software when compared with industry-wide accepted calculation methods. Therefore, the primary objective of this study is to evaluate the variation and repeatability of the measurements produced by these new technologies in corrosion feature profiling and associated PBurst calculations. Two new 3D scanning systems were used for the evaluation of two pipe samples removed from service which contain complex external corrosion features in laboratory. The reliability of the 3D scanning system in measuring corrosion profiles was evaluated against traditional profile gage data. In addition, the associated burst pressures reported by the systems were compared with results obtained using industry-widely used calculation methods. Also, consistencies, errors and gaps in results were identified. In this paper, the approach used for this study is described first, the evaluation results are then presented and finally the findings and their implications are discussed.

scholarly journals 3D scanning systems for monitoring the size of mesh implants

2018 ◽  
Vol 412 ◽  
pp. 012090
Author(s):  
A A Kaleev ◽  
L N Kashapov ◽  
N F Kashapov ◽  
R N Kashapov
Keyword(s):  
3D Scanning ◽  
Scanning Systems

scholarly journals A comprehensive study of the rate-distortion performance in MPEG point cloud compression

2019 ◽  
Vol 8 ◽  
Author(s):  
Evangelos Alexiou ◽  
Irene Viola ◽  
Tomás M. Borges ◽  
Tiago A. Fonseca ◽  
Ricardo L. de Queiroz ◽  
...  
Keyword(s):  
Point Cloud ◽  
State Of The Art ◽  
Subjective Evaluation ◽  
Rate Distortion ◽  
Point Clouds ◽  
Current Approach ◽  
User Engagement ◽  
Viable Solution ◽  
Wide Range ◽  
Objective Quality

Abstract Recent trends in multimedia technologies indicate the need for richer imaging modalities to increase user engagement with the content. Among other alternatives, point clouds denote a viable solution that offers an immersive content representation, as witnessed by current activities in JPEG and MPEG standardization committees. As a result of such efforts, MPEG is at the final stages of drafting an emerging standard for point cloud compression, which we consider as the state-of-the-art. In this study, the entire set of encoders that have been developed in the MPEG committee are assessed through an extensive and rigorous analysis of quality. We initially focus on the assessment of encoding configurations that have been defined by experts in MPEG for their core experiments. Then, two additional experiments are designed and carried to address some of the identified limitations of current approach. As part of the study, state-of-the-art objective quality metrics are benchmarked to assess their capability to predict visual quality of point clouds under a wide range of radically different compression artifacts. To carry the subjective evaluation experiments, a web-based renderer is developed and described. The subjective and objective quality scores along with the rendering software are made publicly available, to facilitate and promote research on the field.

Real-time point cloud registration for flexible hand-held 3D scanning

2020 ◽  
Author(s):  
Yang Yang ◽  
HaiLong Chen ◽  
Xiaoli Liu ◽  
Qijian Tang ◽  
Zewei Cai ◽  
...  
Keyword(s):  
Real Time ◽  
Point Cloud ◽  
3D Scanning ◽  
Point Cloud Registration ◽  
Time Point

Fast Surface Construction and NC Milling Based on 3D Scanning

2013 ◽  
Vol 579-580 ◽  
pp. 598-602
Author(s):  
Zheng Hong Wu ◽  
Qing Kun Zhou ◽  
Da Peng Fan ◽  
Jian Neng Zhu ◽  
Jian Min Wang
Keyword(s):  
Point Cloud ◽  
3D Scanning ◽  
Cnc Machining ◽  
Machining Process ◽  
Cnc Milling ◽  
Cloud Processing ◽  
Whole Process ◽  
Nc Milling ◽  
Data Acquisition And Processing ◽  
Surface Construction

Construction of a rapid surface and processing is an effective way to improve the manufacturing efficiency, this paper linked the 3D scanning, fast surface construction and NC closely, described the whole process of surface data acquisition and processing, surface construction and the process of NC machining. The outer surface of the mouse was scanned from multiple angles by using 3D CaMega scanner, a plurality of point cloud was obtained, the point cloud processing, triangle face processing construct refinement of the model surface and grid lines were all processed in Geomagic Studio software, through adjustments, NURBS surface was generated. Also the mould surface of the mouse was constructed in the UG NX software. This paper wrote the machining process, Programmed NC Milling in UG NX software, generated the trajectory of rough and finishes machining as well as the programs of machining tool. Also CNC milling was processed CNC machining center.

Converting Point Cloud to Revolved Solids

2013 ◽  
Vol 371 ◽  
pp. 468-472
Author(s):  
Mircea Viorel Drăgoi ◽  
Slobodan Navalušić
Keyword(s):  
Reverse Engineering ◽  
Cross Section ◽  
Software Package ◽  
Point Cloud ◽  
3D Model ◽  
Point Clouds ◽  
3D Scanning ◽  
Main Drawback ◽  
Mass Properties

3D scanning is one of the basic methods to gather data for reverse engineering. The main drawback of 3D scanning is that its output - the point cloud - can never be used directly to define surfaces or solids useful to reconstruct the electronic 3D model of the scanned part.The paper presents a piece of software designed in VisualLISP for AutoCAD, software that acts as a point cloud to 3D primitives converter. The novelty consists of the method used to find the parameters of the primitive that best fits to the point cloud: the mass properties of regions are used to find the center of a cones cross section. Parts have been scanned and the point clouds processed. The results obtained prove the correctness of the algorithm and of the method applied. A piece of software that processes the point cloud in order to find the 3D primitive that it fits the best has been developed. The output is the 3D primitive that successfully and accurate replaces the point cloud. Some adjacent tools were designed, so the entire software package becomes a useful tool for the reverse engineering user. The ways the researches can be continued and developed are foreseen, as well

Features 3D scanning systems for rapid prototyping

1997 ◽  
Vol 17 (3) ◽  
pp. 206-210 ◽  
Author(s):  
Jim Clark
Keyword(s):  
Rapid Prototyping ◽  
3D Scanning ◽  
Scanning Systems

scholarly journals Investigation in optimisation of accuracy with non-contact systems by influencing variable processes

2019 ◽  
Author(s):  
Ranveer S. Matharu ◽  
Wayne Sadler ◽  
Bekim V. Gashi ◽  
Trevor Toman
Keyword(s):  
3D Scanning ◽  
Ease Of Use ◽  
Shop Floor ◽  
Accurate Information ◽  
High Quality ◽  
Essential Tool ◽  
Scanning Systems

The use of 3D scanning systems is becoming increasingly popular and an essential tool for manufacturers for inspection and measurement. With such systems being utilised on the manufacturing shop floor due to their portability and ease of use, it is no doubt that such systems are designed to address a variety of users whom, with minimal training can operate the equipment. Due to continuing demands of high-quality products there is the need for manufacturers of 3D scanning systems to develop technologies that deliver fast and accurate information. However, one of the key challenges lies not in the training of people to use the equipment, but to develop engineers who can produce traceable, accurate and precise results with a declared statement of confidence quantifying the quality of the measurement. This statement of the quality of the output results relies on employing a set of workflow actions that involve planning, capture, processing and analysis, and finally output. This paper sets out to show how the results from a set of workflow actions from different categories of 3D scanning devices affects the quality of output.

scholarly journals Calibration of Turntable Based 3D Scanning Systems

2019 ◽  
Vol E102.D (9) ◽  
pp. 1833-1841
Author(s):  
Duhu MAN ◽  
Mark W. JONES ◽  
Danrong LI ◽  
Honglong ZHANG ◽  
Zhan SONG
Keyword(s):  
3D Scanning ◽  
Scanning Systems
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