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Park structure extraction method based on LiDAR data and ortho-images

A technology of orthophoto and extraction method, which is applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problems of covering, shadow effect, perspective deformation vehicles, etc., and achieve comprehensive information, high accuracy, accuracy and high precision effect

Inactive Publication Date: 2015-06-17
NANJING UNIV
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Problems solved by technology

[0007] The technical problem solved by the present invention is to propose a parking lot structure extraction method based on LiDAR data and orthophoto images, which can solve the problems of illumination changes, shadow effects, perspective deformation, and vehicle coverage in the process of parking lot structure extraction, and accurately and high-precision extraction of the structure of the parking lot

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  • Park structure extraction method based on LiDAR data and ortho-images
  • Park structure extraction method based on LiDAR data and ortho-images
  • Park structure extraction method based on LiDAR data and ortho-images

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[0053] The orthophoto data and LiDAR data of this embodiment are respectively as follows figure 1 and figure 2 As shown, the orthophoto data resolution is 5cm, LiDAR data represents different elevations with different gray values, the average point spacing is 1m, the elevation accuracy is 15cm, and the plane accuracy is 30cm.

[0054] The parking lot structure extraction method based on LiDAR data and orthophoto images in this embodiment is completed jointly by ArcGIS9.3, matlab2009, Visual Studio2008 and open source software Edge Detection and ImageSegmentation system, including the following steps:

[0055] The first step is to use LiDAR data to divide the parking lot into open area and non-open area.

[0056] This embodiment uses the open operation of the mathematical morphology method to extract vehicles. For LiDAR data, the opening operation can eliminate the high-value areas in the point set that are smaller than the specified window size. Here, the mathematical morp...

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Abstract

The invention relates to a park structure extraction method based on LiDAR data and ortho-images. The method comprises the following steps of: dividing a park into a vacancy region and a non-vacancy region by virtue of the LiDAR data, generating a central axis of a vehicle surface patch in the non-vacancy region from the LiDAR data, and acquiring parking lines of the park in the vacancy region from ortho-image data; registering the vehicle center axis in the non-vacancy region and the parking lines in the vacancy region, and dividing parking lanes along a maximum intersection direction of the vehicle center axis and the parking lines; and calculating park structure parameters, and generating dividing lines of the parking lanes, thus finishing the extraction of the park structure. The park structure extraction method can be used for solving the problems of illumination variation, shadow effect, perspective distortion, vehicle covering and the like in the park structure extracting process, and extracting the park structure accurately and precisely.

Description

technical field [0001] The invention relates to a method for extracting the structure of a parking lot, in particular to a method for extracting the structure of a parking lot based on LiDAR data and orthophoto images. Background technique [0002] The parking lot, as a place where vehicles temporarily stop, is expanding rapidly with the continuous development of the urbanization process. Today, parking lots are ubiquitous in towns and suburbs alike, even beyond the buildings they serve. [0003] As a necessity in the automobile society, parking lots play an irreplaceable role in human production and life, and the cognitive level of parking lots is also particularly important. The knowledge of the structure of the parking lot and the number of parking spaces is directly related to the decision of the minimum parking requirements (MPRs). MPRs have attracted increasing attention in recent years and have become an important topic related to vehicle parking policy. [0004] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46G06V10/44G06V10/48
CPCG06V20/176G06V10/48G06V10/44
Inventor 程亮童礼华李满春刘永学陈振杰李飞雪黄秋昊王结臣杜培军钟礼山
Owner NANJING UNIV
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