Extraction of compound volumetric features from a three-dimensional wire frame model

Abstract This paper presents an algorithm to generate surface models of 3D objects from their wire-frame models. The algorithm firstly, obtains information about edges of the object from the wire-frame model of the object and uses this edge information to generate the pairs. A pair of an object is a combination of two non-collinear edges which have a common vertex. The algorithm then determines the unique plane passing through each pair and groups the coplanar pairs together. Then it sorts each of the groups of coplanar pairs to form one or more loops of edges. Finally for each group of coplanar pairs, all the loops are combined, using a few rules, to form faces of the object. Hence a surface model of the object is generated.

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THE INFLUENCE OF OXYGEN-CONTAINING FUNCTIONAL GROUPS ON THE SURFACE BEHAVIOR AND ROUGHNESS CHARACTERISTICS OF GRAPHENE OXIDE

NANO ◽

10.1142/s1793292013500458 ◽

2013 ◽

Vol 08 (04) ◽

pp. 1350045 ◽

Cited By ~ 27

Author(s):

AHMAD ALLAHBAKHSH ◽

FARHAD SHARIF ◽

SAEEDEH MAZINANI

Keyword(s):

Graphene Oxide ◽

Functional Groups ◽

Three Dimensional ◽

Diffraction Method ◽

Force Microscopy ◽

Atomic Force ◽

Wire Frame ◽

Stick Model ◽

The Individual ◽

Graphene Oxide Sheets

The effects of oxygen-containing functional groups on the surface roughness of graphene oxide are thoroughly studied using three-dimensional atomic force microscopy images, ball-and-stick model and wire-frame view results. Moreover, X-ray diffraction method and Fourier transform infrared spectroscopy are employed for characterizing the structural and chemical behavior of graphene oxide, respectively. Graphene oxide sheets show a clear concavity on one side when the aggregation of functional groups increased on the other side. This behavior could be the main reason for the surface fluctuation of graphene oxide sheets that is observed in microscopic images. In addition, the individual graphene oxide sheet presents greater values of mean roughness compared to multilayered sheets.

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Effects of Presurgical Orthopedic Treatment in Infants with Complete Bilateral Cleft Lip and Palate

The Cleft Palate-Craniofacial Journal ◽

10.1597/1545-1569_1998_035_0227_eopoti_2.3.co_2 ◽

1998 ◽

Vol 35 (3) ◽

pp. 227-232 ◽

Cited By ~ 1

Author(s):

Katsuaki Mishima ◽

Toshio Sugahara ◽

Yoshihide Mori ◽

Katsuhiro Minami ◽

Masayoshi Sakuda

Keyword(s):

Discriminant Analysis ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Three Dimensional ◽

Predictor Variables ◽

Measuring Apparatus ◽

Orthopedic Treatment ◽

Wire Frame ◽

Bilateral Cleft Lip ◽

Posterior Shift

Objective To align the protruding premaxilla in infants with bilateral cleft lip and palate (BCLP), an intraoral appliance (i.e., Hotz plate) and an extraoral appliance consisting of a band covering the head and elastics are used as a presurgical orthopedic treatment in our clinic. The aim of this study was to analyze the configuration and position of the premaxilla and the vomer in infants with BCLP and to investigate the factors generating deviation and bending of the vomer and twisting of the premaxilla. Patients Palatal casts were obtained serially from 10 infants with complete BCLP from 1 to 3 months of age. Measurements These casts were automatically measured using a highly accurate contact-type measuring apparatus. After three-dimensional wire frame models generated from the serial casts were automatically superimposed, the magnitude and direction of the shift were calculated. A discriminant analysis was used for investigation of predictor variables generating the twisting or bending vomer. Results and Conclusions The vomer was found to be bent in two infants and the premaxilla was twisted in three infants. In the infants whose vomers were bent, the magnitude of the posterior shift of the premaxilla was greater than that of the inferior shift. A discriminant analysis indicated that at 1 month of age, a greater inclination and a smaller deviation of the vomer and a longer distance between the cleft edges of the lateral segments had a tendency to be associated with bending of the vomer or twisting of the premaxilla.

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Design and Model Analysis of City Bus Body Frame Based on ANSYS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.219-220.1389 ◽

2011 ◽

Vol 219-220 ◽

pp. 1389-1392

Author(s):

Xiao Zhong Ren ◽

Shao Jie Du ◽

Xue Sheng Pei

Keyword(s):

Surface Profile ◽

3D Models ◽

Model Analysis ◽

Body Frame ◽

3D Design ◽

Frame Model ◽

City Bus ◽

Wire Frame ◽

Finite Element Technology ◽

Bus Body

Applying the 3D design and finite element technology to the design of city bus body, the model analysis of bus body frame was carried out. On the basis of general modeling of bus body, the locus of bus body frame was constructed in light of the inner surface profile of body cover panel. The 3D models of both bus body frame and floor frame were constructed under Pro/E, and the virtual assembly of them was completed. By leading the wire frame model of bus body frame in ANSYS software, its FEA wire frame model was obtained. The natural frequency and vibration mode of bus body frame can be known by means of model analysis. It lays the foundation for the FEA of whole bus body frame.

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A three dimensional wire frame graphics system

ACM SIGAPL APL Quote Quad ◽

10.1145/384282.28316 ◽

1987 ◽

Vol 17 (4) ◽

pp. 1-6

Author(s):

Uday G. Gujar

Keyword(s):

Three Dimensional ◽

Wire Frame

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A three dimensional wire frame graphics system

Proceedings of the international conference on APL APL in transition - APL '87 ◽

10.1145/28315.28316 ◽

1987 ◽

Author(s):

Uday G. Gujar

Keyword(s):

Three Dimensional ◽

Wire Frame

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ANALYSIS OF DISCRETISATION STRATEGY FOR AREA AND SPACE MEASUREMENT

Geodesy and Cartography ◽

10.3846/13921541.2005.9636661 ◽

2012 ◽

Vol 31 (1) ◽

pp. 28-31

Author(s):

Vytautas Giniotis ◽

Darius Mariūnas

Keyword(s):

Structural Engineering ◽

Three Dimensional ◽

Geometric Accuracy ◽

New Techniques ◽

Volumetric Features ◽

Geometrical Features ◽

Dimensional Measurements ◽

Space Measurement ◽

Complicated Task

Measurement strategy is discussed in the article. It is important to optimise the data selection (sampling) from the object for the determination of its geometrical features within some limits of accuracy. The minimal and maximal intervals of measurement must be selected ensuring the maximal efficiency of operation and the accuracy as well. In machine engineering the typical case is in the calibration of coordinate measuring machines (CMMs) as it is a quite complicated task because of the variety of accuracy parameters to be checked and the high accuracy that must be assured. Some new techniques for the two- and three-dimensional measurements are discussed in this paper leading to a more efficient calibration process. This is relevant to machine engineering where geometric accuracy parameters are to be determined, to the geodetic measurements where slopes of terrain, area flatness and volumetric features are surveyed, in structural engineering, etc.

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Development of prototype hat patterns for elderly women based on three-dimensional modeling

Fashion and Textiles ◽

10.1186/s40691-021-00258-5 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Jungil Jun ◽

Youngshil Ryoo ◽

Kuengmi Choi ◽

Sunmi Park

Keyword(s):

Elderly Women ◽

Population Aging ◽

Three Dimensional ◽

Value Added ◽

The Elderly ◽

Target Group ◽

Three Dimensional Modeling ◽

Dimensional Modeling ◽

Wire Frame ◽

Scan Data

AbstractPopulation aging is a global phenomenon, and the elderly population has a higher economic capability today than that in the past. Thus, this population is considered to be a growing consumer group that enjoys both consumer and leisure life. In this study, we developed prototype hat patterns for elderly women that can be used for developing close-fitting hats, helmets, masks, and smart headwear. Three-dimensional (3D) head scan data of elderly women were employed herein, and the data were classified into three groups with common head size and head shape. The target group was selected from a high-frequency group among the classified groups, and a standard head form representing the target group was developed using averaging and wire frame generation techniques. Four hat types were considered, design baselines were developed for each type, and prototype patterns were designed for each hat type using a flattening technique. The suitability of the developed prototype hat patterns was subsequently verified. Our results showed that all four prototype patterns had errors less than 5 mm2 (1.40%). The hat patterning method proposed in this study is expected to improve the wearing comfort of high-value-added products designed for the elderly.

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