Ground three-dimensional laser point cloud and ground penetrating radar image fusion method

Abstract

The invention discloses a ground three-dimensional laser point cloud and ground penetrating radar image fusion method. On the basis of ground penetrating radar image and GPS data synchronization acquisition, an improved electromagnetic wave path propagation model is used for realizing time-depth conversion of the ground penetrating radar image, with a coordinate system of the ground three-dimensional laser data as reference, a geo reference absolute positioning equation is combined to convert two-different source isomerism data to the same coordinate system, and data fusion is realized. According to data features of a ground three-dimensional laser scanner and the ground penetrating radar, a three-dimensional laser point cloud and ground penetrating radar image fusion method is provided. The experiment result and error analysis prove that the process is simple, the fusion precision is high, and the adaptability is wide. Differences between resolutions and data amounts of the two-different source isomerism data are overcome, advantages of each of the three-dimensional laser scanner and the ground penetrating radar are executed thoroughly, and effective fusion of two different typesof data is realized.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method for fusing ground three-dimensional laser point clouds and ground-penetrating radar images. Background technique [0002] As a non-destructive geophysical detection technology that uses high-frequency electromagnetic waves to determine the structure of shallow strata, ground-penetrating radar has been widely used in archaeological detection and geological engineering investigation due to its simple operation, wide detection range, deep detection depth and high resolution. , Highway disease detection, road cavity and groundwater pollution detection and many other fields, and achieved good application results. The terrestrial 3D laser scanner quickly obtains the external geometry or 3D scene of the measured object by means of non-contact measurement, and has been widely used in recent years. [0003] The ground-based 3D laser scanner can obtain the fine geometric form or 3...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that there is no better fusion method for ground laser point cloud and ground penetrating radar image data, and the fusion accuracy is uncertain, this invention proposes a method for ground three-dimensional laser point cloud and ground penetrating radar image fusion, which solves the two problems. The problem of registration and integration between heterogeneous data sources has realized the fusion display between the two kinds of data, which has given full play to the respective advantages of the two technologies, overcomes the defects of a single data source, and promoted the integration of the two kinds of data. Mutual interpretation improves the accuracy of GPR image interpretation

Images