BIM for existing facilities: feasibility of spectral image integration to 3D point cloud data

Abstract

Abstract. Accurate geometrical and spatial information of the built environment can be accurately acquired and the resulting 3D point cloud data is required to be processed to construct the digital model, Building Information Modelling (BIM) for existing facilities. Point cloud by laser scanning over the buildings and facilities has been commonly used, but the data requires external information so that any objects and materials can be correctly identified and classified. A number of advanced data processing methods have been developed, such as the use of colour information to attach semantic information. However, the accuracy of colour information depends largely on the scene environment where the image is acquired. The limited number of spectral channels on conventional RGB camera often fails to extract important information about surface material, despite spectral surface reflectance can represent a signature of the material. Hyperspectral imaging can, instead, provide precise representation of spatial and spectral information. By implementing such information to 3D point cloud, the efficiency of material detection and classification in BIM should be significantly improved. In this work, the feasibility of the image integration and discuss practical difficulties in the development.

Unsupervised reconstruction of Building Information Modeling wall objects from point cloud data

“…For the experiments, the wall geometry produced by the presented automated procedure is compared to the 2D-3D-S mesh geometry which serve as ground truth. Additionally, the walls of each area (1)(2)(3)(4)(5)(6) are manually modeled to the best of our abilities based on the clusters within Revit to evaluate the number of walls and connections that are established. Finally, Areas 1+6 and 2+4 are combined and processed together to evaluate the multi-storey capabilities of the method.…”

“…These models are vital for the reduction of failure costs during project execution and also serve as a reference for project planning and renovations. BIM is also frequently used for managing assets and is the basis for numerous analyses of existing buildings [1,2]. The creation of an as-built BIM is achieved by adjusting the objects of an existing model or by creating new objects based on observations of the building [3].…”

A Review of Heritage Building Information Modeling (H-BIM)

“…They then use commercial software to reconstruct the mesh surface in 3D models. Other algorithms, investigated to identify and classify objects within the point clouds, are those of color recognition with spectral images [56] and those of feature recognition [49,57,58].…”

Reconstrucción tridimensional del patrimonio arquitectónico mediante la utilización de los sistemas BIM y HBIM. Validación con dos casos de estudio: la Iglesia Santa María la Real de Mave y el Castillo de los Comuneros de Torrelobatón

“…Los autores de (Jung et al, 2014;Hong et al, 2015) Otros algoritmos, investigados recientemente para identificar y clasificar objetos dentro de las nubes de puntos se basan en el reconocimiento de colores con imágenes espectrales (Amano & Lou, 2016) y en el reconocimiento de características (Pu &Vosselman, 2009;Dore & Murphy, 2013).…”