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BIM model external contour rapid extraction method

A technology of external contour and extraction method, which is applied in image data processing, instruments, calculations, etc., can solve problems such as heavy workload, and achieve the effect of fast, efficient, accurate, and convenient data management.

Active Publication Date: 2019-10-18
四川易利数字城市科技有限公司
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  • Application Information

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Problems solved by technology

[0005]1. It is necessary to manually process the BIM model one by one, and the workload is huge;

Method used

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  • BIM model external contour rapid extraction method
  • BIM model external contour rapid extraction method
  • BIM model external contour rapid extraction method

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Embodiment Construction

[0059] The following describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments, for those of ordinary skill in the art, as long as various changes These changes are obvious within the spirit and scope of the present invention defined and determined by the appended claims, and all inventions and creations that utilize the concept of the present invention are protected.

[0060] Such as figure 1 As shown, a method for quickly extracting the outer contour of a BIM model includes the following steps:

[0061] S1. Take out the three-dimensional graphic data of the original BIM model and construct a graphic color mapping table;

[0062] S2. Perform dimensionality reduction processing on the three-dimensional graphics data, convert it into point data and save it in the dimensionality reduction point array;

[0...

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Abstract

The invention discloses a BIM model external contour rapid extraction method. The method comprises: S1, taking out three-dimensional graph data of an original BIM model and constructing a graph colormapping table; S2, performing dimension reduction processing on the three-dimensional graph data, converting the three-dimensional graph data into point data, and storing the point data in a dimensionreduction point array; S3, according to the point data stored in the dimensionality reduction point array, constructing a dimensionality reduction polygon and determining an external cube of the dimensionality reduction polygon; S4, shooting each surface of the external cube through a virtual camera to obtain a corresponding picture and an RGB value of each component pixel of the picture; and S5,according to the RGB value in each picture, obtaining graphic information in the image color mapping table, and determining an external contour of the BIM model. According to the method, external cubes of different BIM models can be rapidly extracted in batches, almost no manual intervention is needed, the BIM model contour extraction process is rapid, efficient and high in accuracy, and meanwhile data management is facilitated by using computer storage.

Description

Technical field [0001] The invention belongs to the technical field of BIM model processing, and specifically relates to a method for quickly extracting the outer contour of a BIM model. Background technique [0002] Nowadays, BIM models are developing towards refinement and comprehensiveness, which contains more and more model details, resulting in larger and larger models, which brings a huge impact to the display of BIM models based on WEB and APP. Challenges. In fact, such a detailed model is not needed in the rendering of large scenes. If the model contour data can be extracted, the loading speed and loading data will be greatly reduced. [0003] In the past, to obtain model contour data, manually processing the BIM model was used to extract the simulated contour and delete the model in it. Finally, the model contour data was obtained. This method requires a lot of work and requires large batches. It does not apply during data processing. [0004] Therefore, the main problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/90G06T7/13G06T7/70G06T3/00
CPCG06T7/90G06T7/13G06T7/70G06T3/067
Inventor 杨斌彭真邓廷
Owner 四川易利数字城市科技有限公司
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