International Journal of Advanced Culture Technology

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
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A Study on 3D File Format for Web-based Scientific Visualization

  • Received : 2019.01.30
  • Accepted : 2019.03.12
  • Published : 2019.03.31
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Abstract

The most commonly used 3D modeling file formats are OBJ (Wavefront file format specification) and STL (STereoLithography). Although they have a common point of view in 3D on the screen, detailed functions are different according to purpose of development. OBJ is the most commonly used 3D file format and STL is mainly used as 3D file format for 3D printing. However, in the field of Scientific Visualization, precise analysis is required. There is a difference in accuracy depending on the type of 3D file format. OBJ and STL are not suitable for delicate surface description because they form meshes in the form of triangular polygons. And if you increase the number of triangle polygons, it will be smoother, but the file size also increases exponentially and causes excessive CPU usage. In contrast, VTK provides a variety of polygon structures, including triangular polygons as well as rectangular polygons and cube polygons. Thus, delicate surface depiction is possible. Delicate surface rendering is possible and file size is not large. This paper describes the concept and structure of VTK. We also compared the load times and file sizes between VTK, STL, and OBJ in the Chrome browser. In addition, the difference in surface rendering ability between VTK, STL, and OBJ is intuitively viewed based on the screen in which each 3D file format is implemented under the same conditions. This study is expected to be helpful for efficient 3D file format for precise implementation of Web - based Scientific Visualization.

Keywords

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Figure 1. Scientific Visualization using VTK files

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Figure 2. Two Types of VTK files (a) simple legacy Type (b) XML Type

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Figure 3. Performance comparison on the web

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Figure 4. Brain parcel Implementation (a).OBJ (b).VTK (c).STL

Table 1. Experiment Environment

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Table 2. Performance comparison on the web

E1GMBY_2019_v7n1_243_t0002.png 이미지

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