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Accurate and Detailed Image-Based 3D Documentation of Large Sites and Complex Objects
Published in Filippo Stanco, Sebastiano Battiato, Giovanni Gallo, Digital Imaging for Cultural Heritage Preservation, 2017
Filippo Stanco, Sebastiano Battiato, Giovanni Gallo
Reality-based techniques (e.g., photogrammetry, laser scanning, etc.) [15] employ hardware and software to survey the reality as it is, documenting the actual visible situation of the site. Non-real approaches are instead based on computer graphics software (3D Studio, Maya, Sketchup, etc.) or procedural modeling [16] and they allow the generation of 3D data without any particular survey or knowledge of the site. Nowadays the digital documentation and 3D modeling of cultural heritage is mostly based on reality-based techniques and methodologies and it generally consists of [128]:
3D-GIS Parametric Modelling for Virtual Urban Simulation Using CityEngine
Published in Annals of GIS, 2022
Ibrahim M. Badwi, Hisham M. Ellaithy, Hidi E. Youssef
Procedural Modelling uses the Computer Generated Architecture Rules (CGA-Rules) that specify a series of well-structured coding statements, subroutines and functions in the program to achieve the desired output. The Commands provided in CityEngine’s CGA shape grammar, such as ‘extrude’, ‘split’ or ‘texture’ are widely known commands in 3D modelling applications (Ghorbanian and Shariatpour 2019). In addition, the models produced are interactive and have the capability to be adapted to the new rules at any time. A single CGA rule can be used to generate a number of 3D models. For example, the rule may apply the attributes of the urban element stored in 2D-GIS data, such as floor number, floor height, windows and doors width, roof type, wall material type, etc. The more urban element attributes the more accurate the model generated.
Component-driven pocedural modeling for ancient Chinese architecture of the Qing Dynasty
Published in International Journal of Architectural Heritage, 2018
Procedural modeling is a promising method for 3D scene construction. Because of the irregularity and complexity of 3D objects, different proceural modeling methods have their respective application fields. (1) Fractal methods mainly use recursive algorithm combining with simple rules to simulate 3D modeling of trees, flowers and plants, terrains and so on. (2) Procedural modeling methods based on syntax rules are mainly represented by L-system. It is mainly used in the generation of plant morphology, but it needs to understand the plant characteristics and set relevant parameters reasonably. (3) The box segmentation method based on shape grammar can be used in the procedural modeling of modern architecture. It is suitable for generating a target model defined by simple transformations of repeating elements (Lars 2013).