scholarly journals 3d point cloud model of human bio form created by the application of geometric morphometrics and method of anatomical features: human tibia example

Filomat ◽  
2019 ◽  
Vol 33 (4) ◽  
pp. 1217-1225
Author(s):  
Nikola Vitkovic ◽  
Ljiljana Radovic ◽  
Miroslav Trajanovic ◽  
Miodrag Manic
Keyword(s):  
Geometric Morphometrics ◽  
Point Cloud ◽  
Cloud Model ◽  
Anatomical Landmarks ◽  
3D Point Cloud ◽  
Specific Patient ◽  
Human Tibia ◽  
Biological Form ◽  
Point Cloud Model ◽  
The Creation

Morphometrics refers to the quantitative analysis of a biological form and it can be used to describe its shape. Common types of geometric morphometrics are Landmark-based Geometric Morphometrics which describe shape by using anatomical landmarks (e.g. points), and Outline-based geometric morphometrics which uses envelope curves to describe shape of the biological form (e.g. bone), and they are not absolutely exclusive. Geometric morphometrics can be used for the creation of statistical models which represent shape variation of specific bio form. In this paper, novel application of geometric morphometrics for the creation of personalized models of unique bio-forms, i.e. models which are created for the specific patient is presented. Personalized model is defined as 3D point cloud model of biological form (in this case human tibia). Positions of points in 3D space are determined by using set of parametric functions defined by applying geometrical morphometrics, morphology properties and statistical analysis on the input set of human tibia samples. By using this technique, anatomically correct and geometrically accurate personalized models of bio forms can be created and used in pre, intra, and post-operative procedures in clinical practice.

scholarly journals Research on the Involvement of Computer Graphics Algorithms in Systems for the Creation of Public Sculpture

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Acheng Zhou ◽  
Chao Gao
Keyword(s):  
Computer Graphics ◽  
Computer Image ◽  
Point Cloud ◽  
Laser Scanning ◽  
Cloud Model ◽  
High Definition ◽  
Cloud Data ◽  
Point Cloud Model ◽  
The Creation ◽  
Public Sculpture

Currently, there is less research on how to improve the efficiency of the application of computer graphics technology in the creation of public sculpture. Therefore, this paper will focus on how computer graphics algorithms can enable systems for the creation of public sculpture with the intervention of computer graphics technology to create more accurate and completed works of public sculpture. It will explore and analyze how computer image algorithms can help creators apply computer image technology to finish complete and accurate public sculptures, and individual studies, computer imagery, and model analysis are also used. In systems for the creation of public sculpture, the point cloud data of the model is obtained through 3D laser scanning technology; then the algorithm of the point cloud model is integrated and the Statistical Outlier Removal algorithm of the point cloud model intervention is processed. By this way, the point cloud model of the work is optimized, and then a more completed and accurate public sculpture work can be produced by 3D sculpting or 3D printing. The research shows that, in the creation of public sculptures with the intervention of computer graphics technology, the computer graphics algorithm acquires the basis of the high-definition public sculpture data model. The computer graphics algorithm improves the accuracy and completeness of the creator using computer graphics technology; it is also the key to transform the accurate enlargement and transformation of the sculptural model into the actual sculptural work.

scholarly journals Dust Removal from 3D Point Cloud Data in Mine Plane Areas Based on Orthogonal Total Least Squares Fitting and GA-TELM

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Jingli Wang ◽  
Huiyuan Zhang ◽  
Jingxiang Gao ◽  
Dong Xiao
Keyword(s):  
Least Squares ◽  
Point Cloud ◽  
Cloud Model ◽  
Hollow Structure ◽  
Total Least Squares ◽  
3D Point Cloud ◽  
Denoising Method ◽  
Least Squares Fitting ◽  
Cloud Models ◽  
Point Cloud Model

With the further development of the construction of “smart mine,” the establishment of three-dimensional (3D) point cloud models of mines has become very common. However, the truck operation caused the 3D point cloud model of the mining area to contain dust points, and the 3D point cloud model established by the Context Capture modeling software is a hollow structure. The previous point cloud denoising algorithms caused holes in the model. In view of the above problems, this paper proposes the point cloud denoising method based on orthogonal total least squares fitting and two-layer extreme learning machine improved by genetic algorithm (GA-TELM). The steps are to separate dust points and ground points by orthogonal total least squares fitting and use GA-TELM to repair holes. The advantages of the proposed method are listed as follows. First, this method could denoise without generating holes, which solves engineering problems. Second, GA-TELM has a better effect in repairing holes compared with the other methods considered in this paper. Finally, this method starts from actual problems and could be used in mining areas with the same problems. Experimental results demonstrate that it can remove dust spots in the flat area of the mine effectively and ensure the integrity of the model.

Opening State Estimation of Mouth Using 3D Point Cloud Model of Nose

2019 ◽  
Vol 2019 (0) ◽  
pp. 2A1-S09
Author(s):  
Takuo SUZUKI ◽  
Kazuki ITO ◽  
Yasushi NAKAUCHI ◽  
Shigeo TANABE ◽  
Masahiko MUKAINO
Keyword(s):  
State Estimation ◽  
Point Cloud ◽  
Cloud Model ◽  
3D Point Cloud ◽  
Point Cloud Model

scholarly journals Hole Repairing Algorithm for 3D Point Cloud Model of Symmetrical Objects Grasped by the Manipulator

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7558
Author(s):  
Linyan Cui ◽  
Guolong Zhang ◽  
Jinshen Wang
Keyword(s):  
Point Cloud ◽  
Cloud Model ◽  
Engineering Application ◽  
Point Clouds ◽  
Real Point ◽  
3D Point Cloud ◽  
Virtual Camera ◽  
3D Point Clouds ◽  
Cloud Models ◽  
Point Cloud Model

For the engineering application of manipulator grasping objects, mechanical arm occlusion and limited imaging angle produce various holes in the reconstructed 3D point clouds of objects. Acquiring a complete point cloud model of the grasped object plays a very important role in the subsequent task planning of the manipulator. This paper proposes a method with which to automatically detect and repair the holes in the 3D point cloud model of symmetrical objects grasped by the manipulator. With the established virtual camera coordinate system and boundary detection, repair and classification of holes, the closed boundaries for the nested holes were detected and classified into two kinds, which correspond to the mechanical claw holes caused by mechanical arm occlusion and the missing surface produced by limited imaging angle. These two kinds of holes were repaired based on surface reconstruction and object symmetry. Experiments on simulated and real point cloud models demonstrate that our approach outperforms the other state-of-the-art 3D point cloud hole repair algorithms.

AUTOMATED FE MODELING FROM 3D POINT CLOUD MODEL OF A DAMAGED STEEL STRUCTURAL MEMBER

2019 ◽  
Vol 75 (2) ◽  
pp. I_141-I_149
Author(s):  
Sanae SUZUKI ◽  
Yasunori MIYAMORI ◽  
Takehiko SAITO ◽  
Tomoyuki YAMAZAKI ◽  
Munkhjargal DAMBIIBALJIR ◽  
...  
Keyword(s):  
Point Cloud ◽  
Cloud Model ◽  
Structural Member ◽  
3D Point Cloud ◽  
Fe Modeling ◽  
Point Cloud Model
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