Viewpoint planning for automated 3D digitization using a low-cost mobile platform

Author(s):  
Sijian Zhang ◽  
Gangfeng Yan ◽  
Weihua Sheng
Author(s):  
Ankit Ravankar ◽  
Abhijeet Ravankar ◽  
Takanori Emaru ◽  
Yukinori Kobayashi
Keyword(s):  
Low Cost ◽  

2013 ◽  
Vol 718-720 ◽  
pp. 1108-1112
Author(s):  
Jian Li ◽  
Cheng Yan Zhang ◽  
Xue Li Xu ◽  
Hai Feng Chen

A body-size measurement method based on checkerboard matching is proposed. First, calibrated cameras are used to acquire two body images after projecting chess boards on human body with projector. Then, the parallax of the two images is got by feature extraction and stereo matching. Finally, we can calculate the 3D coordinates of the human body according to the principle of binocular vision to complete the acquisition of body size. The result shows that measurement error is ± 4%. This study can measure automatically and improve precision compared with traditional methods while it has low-cost, simple operation compared with the non-contact measurement. And the results accuracy can meet its general application in practice.


CIndustries encourage the use of low-cost compact and easily controllable equipment’s to implement automation due to the lack of skilled labors and low productivity. This demands the need for more efficient and affordable novel mechanisms and processes. In this paper, the kinematic analysis of a 3-PPSS (P— prismatic joint, S- spherical joint) parallel manipulator having an equilateral mobile platform is explained. The Kinematic analysis is done using the Modified Denavit-Hartenberg (DH) modelling technique. The inverse kinematic equations are further solved using Levenberg-Marquardt Algorithm to obtain an exact solution for the joint variables corresponding to an instantaneous pose of the end effector. Static structural analysis is done using ANSYS software to determine the deformations and stresses induced. Optimum dimensions are chosen for the manipulator based on this analysis. Finally, an ARDUINO based control is implemented to manipulate the mobile platform by controlling the active prismatic joints.


Author(s):  
O. Lanz ◽  
F. Sottsas ◽  
M. Conni ◽  
M. Boschetti ◽  
E. Nocerino ◽  
...  

Abstract. Image-based 3D models generation typically involves three stages, namely: 2D image acquisition, data processing, and 3D surface generation and editing. The availability of different easy-to-use and low-cost image acquisition solutions, combined with open-source or commercial processing tools, has democratized the 3D reconstruction and digital twin generation. But high geometric and texture fidelity on small- to medium-scale objects as well as integrated commercial system for mass 3D digitization are not available. The paper presents our effort to build such a system, i.e. a market-ready multi-camera solution and a customized reconstruction process for mass 3D digitization of small to medium objects. The system is realized as a joint work between industrial and academic partners, in order to employ the latest technologies for the needs of the market. The proposed versatile image acquisition and processing system pushes to the limits the 3D digitization pipeline combining a rigid capturing system with photogrammetric reconstruction methods.


2021 ◽  
Vol 162 ◽  
pp. 105814
Author(s):  
Han Zhang ◽  
Zheyuan Chen ◽  
Jing Dai ◽  
Wei Zhang ◽  
Yuqian Jiang ◽  
...  

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2580
Author(s):  
Ramón González-Merino ◽  
Elena Sánchez-López ◽  
Pablo E. Romero ◽  
Jesús Rodero ◽  
Rafael E. Hidalgo-Fernández

This work is aimed at describing the design of a mechanical and programmable 3D capturing system to be used by either 3D scanner or DSLR camera through photogrammetry. Both methods are widely used in diverse areas, from engineering, architecture or archaeology, up to the field of medicine; but they also entail certain disadvantages, such as the high costs of certain equipment, such as scanners with some precision, and the need to resort to specialized operatives, among others. The purpose of this design is to create a robust, precise and cost-effective system that improves the limitations of the present equipment on the market, such as robotic arms or rotary tables. For this reason, a preliminary study has been conducted to analyse the needs of improvement, later, we have focused on the 3D design and prototyping. For its construction, there have been used the FDM additive technology and structural components that are easy to find in the market. With regards to electronic components, basic electronics and Arduino-based 3D printers firmware have been selected. For system testing, the capture equipment consists of a Spider Artec 3D Scanner and a Nikon 5100 SLR Camera. Finally, 3D models have been developed by comparing the 3D meshes obtained by the two methods, obtaining satisfactory results.


Author(s):  
Miguel Angel Garcia-Ruiz ◽  
Pedro Cesar Santana-Mancilla ◽  
Laura Sanely Gaytan-Lugo

Algoma University holds an important collection of Canadian objects from the Anishinaabe culture dating from 1880. Some of those objects have been on display in the university's library, but most of them still remain stored in the university's archive, limiting opportunities to use them in teaching and learning activities. This chapter describes a research project focusing on digitizing and visualizing cultural artifacts using virtual reality (VR) technology, with the aim of supporting learning of Canadian heritage in cross-cultural courses. The chapter shows technical aspects of the objects' 3D digitization process and goes on to explain a user study with students watching a 3D model displayed on a low-cost VR headset. Results from the study show that visualization of the 3D model on the VR headset was effective, efficient, and satisfactory enough to use, motivating students to keep using it in further sessions. Technology integration of VR in educational settings is also analyzed and discussed.


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