Road segmentation processing method and system
A road and segment technology, applied in the field of high-precision map production, can solve the problems of inconvenient data storage, high cost and low efficiency.
Active Publication Date: 2021-05-07
WUHAN KOTEI INFORMATICS
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Problems solved by technology
[0002] In the field of navigation maps and high-precision maps, it is often encountered segmental processing of roads or lanes, such as laser point clouds or vehicle trajectories collected by surveying and mapping vehicles in the field. The road will bring inconvenience to the storage of data. When performing curve fitting on roads or lanes for smoothing, calculating curvature, etc., segmentation processing is a necessary process.
The current common practice is to manually calibrate the position of the segment when collecting control points and processing, which is costly and inefficient
Method used
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[0049] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0050] Since road construction meets certain engineering technical standards, it will also meet this standard after digitization. Road construction generally consists of three forms or a combination of these three forms, which are: ① straight line, ② circular curve, ③ transitional curve. These three curves have their own unique geometric characteristics. According to this characteristic, the present invention combines the spatial geometric characteristics of roads and lanes to obtain a simple and feasible segmentation method. Since there is no need to manually calibrate the segment position, it can effectively reduce costs and improve digital efficiency.
[0051] Specifically, an embodiment of the present inventio...
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The invention relates to a road segmentation processing method and system, and the method comprises the steps: extracting a point column used for representing a road center line, carrying out the linear interpolation, and segmenting the road center line into a plurality of road segments through the point column after linear interpolation; sequentially calculating the azimuth hopping quantity of each road segment relative to the previous road segment, and constructing an azimuth hopping quantity sequence; dividing the azimuth hopping variable sequence into a plurality of subsequences according to a preset hopping variable approximate threshold value epsilon, replacing each azimuth hopping variable in the subsequences by using a subsequence hopping variable mean value, and establishing an approximate azimuth hopping variable sequence; collecting and dividing the subsequences according to a preset segmentation minimum point threshold value delta, the lengths of the subsequences and the lengths of the front and back subsequences, and then performing segmentation division on the road segments; and fitting the road segment set corresponding to each sub-sequence into a straight line segment or a curve segment according to the azimuth hopping mean value of each sub-sequence. According to the scheme, the cost can be effectively reduced, and the digitization efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of high-precision map production, in particular to a method and system for road segment processing in the process of making a navigation map or a high-precision map. Background technique [0002] In the field of navigation maps and high-precision maps, it is often encountered segmental processing of roads or lanes, such as laser point clouds or vehicle trajectories collected by surveying and mapping vehicles in the field. The road will bring inconvenience to the storage of data. When performing curve fitting on roads or lanes for smoothing, calculating curvature, etc., segmentation processing is a necessary process. The current common practice is to manually calibrate the position of the segment when collecting control points and processing, which is costly and inefficient. Contents of the invention [0003] Aiming at the technical problems existing in the prior art, the present invention provides a road ...
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IPC IPC(8): G01C21/32
CPCG01C21/32
Inventor 程德心张进军
Owner WUHAN KOTEI INFORMATICS