Plane space contour skeleton line extraction method

Abstract

The invention belongs to the technical field of image processing, and discloses a plane space contour skeleton line extraction method, which specifically comprises the following steps: S1, docking CAD analysis service to obtain wall lines, doors, windows and other primitives on a CAD building plane drawing; and S2, zooming the CAD drawing frame to a picture with a fixed proportion, recording the zooming proportion, recording the primitives obtained in the step S1, drawing the primitives on the picture according to the same proportion, and then obtaining the contour of each closed space by using an image processing method. Through binarization image conversion, a Guo-Hall refinement algorithm, a Hough straight line detection algorithm and a minimum spanning tree algorithm, a trunk skeleton line can be rapidly extracted from a space contour on an architectural drawing; the extracted skeleton line is composed of a plurality of line segments, so that other professional structures can be assisted to be accurately placed; therefore, after the skeleton line is converted into the CAD drawing, other professions can be conveniently assisted in intelligent drawing output.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for extracting a skeleton line of a spatial contour of a plan view. Background technique [0002] At present, before the start of a construction project, the construction drawing review agency identified by the construction competent department needs to review the content of the construction drawing involving public interests, public safety and mandatory standards for engineering construction in accordance with relevant laws and regulations; the following points need to be ensured: [0003] (1) The stability and safety review of the building, including whether the foundation and the main structural system are safe and reliable, [0004] (2) Whether it conforms to relevant mandatory standards and norms for fire protection, energy saving, environmental protection, earthquake resistance, sanitation, and civil air defense, etc., [0005] (3) Whether the...

AI Technical Summary

Problems solved by technology

[0008] At present, there is no mature technology for extracting the skeleton line of the spatial outline in the CAD architectural plan drawing. In the field of image recognition, there is an algorithm for refining the file in the image format to obtain the skeleton line of the fixed image area, but there is a special-shaped outline graphic extraction. There are many messy small branches in the skeleton line, there is no way to obtain the backbone skeleton line to assist in intelligentizing other professional drawings, so it needs to be improved

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