Method for dynamic browsing of vehicle-mounted mass point cloud data

Abstract

The invention relates to a method for dynamic browsing of vehicle-mounted mass point cloud data. According to a principle of a vehicle-mounted laser measuring system, a quick access point cloud format and a corresponding memory structure are self-defined. For a point cloud file with the format, the method comprises the following steps of setting the threshold value of the maximum point cloud loading number of a single file, and calculating the thinning level of the current point cloud file; according to the thinning level and the total point number of the point cloud file, calculating the number of actually loaded point clouds in the current point cloud file; according to the current available physical memory capacity of a computer, judging whether the point cloud file can be loaded into a memory or not; when the point cloud file can be loaded into the memory, resetting the threshold value of the maximum point cloud loading number of the single file; using a sectional memory mapping method to load the point cloud file into the memory, and adopting a multi-thread technique to perform real-time memory replacement and dot cloud rendering according to circle indexes and point cloud data in the memory, so as to realize the dynamic browsing of the vehicle-mounted mass point cloud data. The method has the advantages that the higher view displaying property can be obtained by shorter response time, and the problem of dynamic browsing of the vehicle-mounted mass point cloud data in computers with common configuration is solved.

Description

technical field [0001] The invention relates to a method for dynamically browsing vehicle-mounted massive point cloud data, and belongs to the technical fields of photogrammetry and three-dimensional laser. Background technique [0002] As an important data source in the field of surveying and mapping, 3D laser point cloud data can quickly digitally express the real world such as natural environment, cultural heritage, and cities through high-precision step-by-step scanning, and use visualization technology to present these 3D spatial digital information on the computer. , and interact with computers in this simulated environment in the way people are used to every day. At present, the traditional data collection method has a huge workload and low work efficiency. The vehicle-mounted laser measurement system provides a new technical means for the acquisition of spatial three-dimensional information, which can quickly convert the real world into data that can be processed, an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the vehicle-mounted massive point cloud data is difficult to load in real time and efficiently browse efficiently. Aiming at the point cloud data, a method for storing point cloud data by circle and a storage method for vehicle-mounted massive point cloud data based on this storage method are proposed. Fast Dynamic Browsing Method

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