Quality evaluation of lightweight realistic 3D model based on BIM forward design

Abstract

In this paper, we assess the lightweight efficiency of the realistic 3D model data through comparative tests by introducing the realistic three-dimensional model into building information modeling (BIM) design. To meet the varied needs of engineering design in the construction field at different stages, a quality evaluation method for the lightweight realistic 3D model is proposed, with the texture quality and plane positioning accuracy of the model taken into account. The results show that the best lightweight coefficient of realistic 3D model data in film box (FBX) format is 40%. Under a lightweight coefficient at 40%, the amount of model data is reduced by 25%, with only small holes incurred in the texture, and the atness error is ±9 mm. After lightweight processing, the model meets the requirements of BIM designers for vision and plane positioning accuracy. By putting forward a data lightweight processing standard and a model evaluation method based on the idea of BIM design, we aimed to solve the challenges in applying realistic 3D models to BIM design due to the large amounts of data, thereby to lay a foundation for wider application of realistic 3D models to BIM design.