TIN filtering correction method based on full-waveform airborne laser radar data
An airborne lidar, full-waveform technology, applied in image data processing, computer parts, instruments, etc., can solve problems such as the existence of response time and the inability to obtain accurate ground points in low vegetation areas, and achieve the effect of improving accuracy
Pending Publication Date: 2019-12-03
WUHAN MEASUREMENT OF SPATIAL INFORMATION TECH CO LTD
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[0005] In view of this, in order to overcome the deficiencies of the existing technology, the present invention provides a full waveform based The TIN filter correction method of laser radar data can effectively improve the automatic classification accuracy of ground points recorded in laser radar data, and the purpose of obtaining high-precision digital ground model
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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] refer to figure 1 , a TIN filter correction method based on full-waveform airborne lidar data, which is mainly realized through the following steps:
[0033] First: full waveform airborne lidar preparation and installation, and generation of airborne lidar data;
[0034] Second: extract the point cloud attribute features in the airborne lidar data and the echo parameter information of the full waveform data, establish a decision tree mechanism, and ext...
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The invention discloses a TIN filtering correction method based on full-waveform airborne laser radar data. The method comprises the following steps: (1) preparing and installing a full-waveform airborne laser radar; and (2) carrying out data acquisition by utilizing the equipment in the step (1); (3) respectively extracting point cloud attribute characteristics in airborne laser radar data and echo parameter characteristics of full waveform data; and (4) combining the point cloud attribute characteristics in the airborne laser radar data obtained in the step (3) with the echo parameter characteristics of the full waveform data, and extracting vegetation point cloud data; (5) optimizing a ground seed point selection process based on the vegetation point cloud extracted in the step (4) to obtain a high-precision ground seed point set; and (6) constructing an initial triangulation network by utilizing the ground seed point set selected in the step (5), and realizing ground point extraction to obtain a digital ground model. According to the method, two sets of data of the full-wave airborne laser radar are utilized, and the purpose of extracting the high-precision digital ground modelis achieved through feature analysis and processing.
Description
【Technical field】 [0001] The invention relates to the technical field of airborne laser radar, in particular to a TIN filter correction method based on full-waveform airborne laser radar data. 【Background technique】 [0002] Airborne LiDAR (Airborne Light Detection And Ranging, LiDAR) is an active aerial remote sensing earth observation system. It is an emerging technology first developed by Western countries and put into commercial application in the early 1990s. It integrates laser Rangefinder, Global Positioning System (GPS) and Inertial Measurement Unit (IMU) all in one. This technology has produced a major breakthrough in the real-time acquisition of three-dimensional spatial information, and provides a new technical means for obtaining high-spatial-resolution geospatial information. By emitting and receiving laser pulses, airborne LiDAR can directly and quickly obtain dense high-precision three-dimensional point coordinates on the surface (that is, airborne LiDAR poin...
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IPC IPC(8): G06K9/00G06K9/34G06K9/62G06T17/20
CPCG06T17/20G06V20/188G06V10/267G06F18/24323
Inventor 马洪超马海池张良
Owner WUHAN MEASUREMENT OF SPATIAL INFORMATION TECH CO LTD