STL file generation from measured point data by segmentation and Delaunay triangulation

Lee, Seok-Hee; Kim, Ho-Chan; Hur, Sung-Min; Yang, Dong‐Yol

doi:10.1016/s0010-4485(01)00199-3

Cited by 27 publications

(10 citation statements)

References 20 publications

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“…Delaunay tetrahedralization approach is based on Delaunay triangulation approach [15,16]. Delaunay triangulation is a methodology developed so that no vertex from the entire point data set lies inside the inscribed circle of any triangle which ensures nonintersecting and non-overlapping triangulated network.…”

Section: Methods To Construct Stl Filementioning

confidence: 99%

Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans

Chougule¹,

Mulay²,

Ahuja

2016

J. Inst. Eng. India Ser. C

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This work deals with development of algorithm for physical replication of patient specific human bone and construction of corresponding implants/inserts RP models by using Reverse Engineering approach from non-invasive medical images for surgical purpose. In medical field, the volumetric data i.e. voxel and triangular facet based models are primarily used for bio-modelling and visualization, which requires huge memory space. On the other side, recent advances in Computer Aided Design (CAD) technology provides additional facilities/functions for design, prototyping and manufacturing of any object having freeform surfaces based on boundary representation techniques. This work presents a process to physical replication of 3D rapid prototyping (RP) physical models of human bone from various CAD modeling techniques developed by using 3D point cloud data which is obtained from noninvasive CT/MRI scans in DICOM 3.0 format. This point cloud data is used for construction of 3D CAD model by fitting B-spline curves through these points and then fitting surface between these curve networks by using swept blend techniques. This process also can be achieved by generating the triangular mesh directly from 3D point cloud data without developing any surface model using any commercial CAD software. The generated STL file from 3D point cloud data is used as a basic input for RP process. The Delaunay tetrahedralization approach is used to process the 3D point cloud data to obtain STL file. CT scan data of Metacarpus (human bone) is used as the case study for the generation of the 3D RP model. A 3D physical model of the human bone is generated on rapid prototyping machine and its virtual reality model is presented for visualization. The generated CAD model by different techniques is compared for the accuracy and reliability. The results of this research work are assessed for clinical reliability in replication of human bone in medical field.

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Section: Methods To Construct Stl Filementioning

confidence: 99%

Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans

Chougule¹,

Mulay²,

Ahuja

2016

J. Inst. Eng. India Ser. C

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“…The STL file format represents the surfaces of a 3D solid model as a triangular net. (7) Despite the shortcoming of lacking topological information, the STL file format is widely used owing to its simplicity. Much research has been conducted to improve or replace this file format.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Exposure Time Variation Method Using DMD for Microstereolithography

Kim

Yoon

Lee

et al. 2012

JAMDSM

Self Cite

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In stereolithography, parts are fabricated by curing photopolymeric resins with light. The application of stereolithography can now be extended to a very small scale. The process, called microstereolithography, can fabricate parts on a microscale without any further consideration of geometry complexity. In particular, projection-type microstereolithography can perform quite rapid fabrication that cures a specific cross section in one exposure to light without movement. However, in the case where the light source has a nonuniform intensity or an aberration caused by its optics, the part might have some distortion, and this is commonly the case. Because the material experiences shrinkage when it is cured, the light intensity over the entire cross section should be uniform. This study utilizes a Dynamic Mirror Device, which is mainly used for beam shaping, to control the beam intensity also. This control makes the beam intensity profile flat and reduces the distortion to a great degree. This paper presents the concept of an exposure time control method that makes the beam intensity uniform, and it also presents some experimental results.

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“…The region to be triangulated is selected by the deviation of a triangle and its surrounding ones, and the triangulation is implemented based on the distance between points of the region. In the case of laser scanning, Lee et al [10] proposed an approach to generate STL file from measurement point data by segmentation and Delaunay triangulation. Segmentation is performed based on local and global curvatures between triangles, and segments are classified as plane, smooth, and rough regions.…”

Section: Related Workmentioning

confidence: 99%

Integrating cross-sectional imaging based reverse engineering with rapid prototyping

Liu

Wang

2006

Computers in Industry

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STL file generation from measured point data by segmentation and Delaunay triangulation

Cited by 27 publications

References 20 publications

Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans

Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans

Exposure Time Variation Method Using DMD for Microstereolithography

Integrating cross-sectional imaging based reverse engineering with rapid prototyping

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