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Integral aerial triangulation method for airborne laser scanning point cloud and optical image

An airborne laser scanning and optical imaging technology, applied in the field of remote sensing images, can solve the problems of systematic offset of registration results, loose models, incomplete adjustment models, etc.

Inactive Publication Date: 2013-07-10
WUHAN UNIV
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Problems solved by technology

Only the error between the point cloud and the image itself is considered, but the error between the two is not considered, resulting in an incomplete adjustment model and low processing accuracy
[0016] Secondly, the external registration only starts from the phenomenon of spatial misalignment between data, and fails to grasp the root cause of the misalignment
Some kind of data is artificially selected as a reference, ignoring the systematic error of the reference data itself, resulting in systematic deviation of the registration results
[0017] To sum up, for the problem of improving the accuracy of data positioning in the integrated processing of point cloud and image, the existing methods have problems such as the model is not strict, and the processing accuracy needs to be improved.

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  • Integral aerial triangulation method for airborne laser scanning point cloud and optical image
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  • Integral aerial triangulation method for airborne laser scanning point cloud and optical image

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Embodiment Construction

[0054] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0055] In order to facilitate understanding of the technical solution of the present invention, the following parts are described in the following sections:

[0056] (1) Observation model based on LiDAR object space point

[0057] According to the principle of laser positioning, the relationship between the coordinates of the laser foot point and the system error can be expressed as formula (1). Where (X,Y,Z) is the coordinates of the laser foot point (that is, the coordinates of the object space point), (X SI ,Y SI ,Z SI ) is the scanning center coordinates at the moment of laser pulse emission, R lid is the attitude matrix at the time of laser pulse emission, R scan is the laser scanning angle rotation matrix, θ is the scanning angle, and ρ is the laser pulse ranging value.

[0058] X ...

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Abstract

The invention provides an integral aerial triangulation method for an airborne laser scanning point cloud and an optical image. An integral aerial triangulation strict balancing model for connecting the point cloud and the image is built according to a related relation between the point cloud and a system error of the image; and the integral compensation is carried out on the system error, so that the positioning precision of the point cloud and the image can be improved, and the registering of the point cloud and the image is realized. A relation process of the technical scheme disclosed by the invention is simple; the automatic operation is supported; the accuracy of a result is high; and the key problem of an integrated system of an airborne LiDAR (Light Detection And Ranging,) and an aviation camera is solved.

Description

technical field [0001] The invention relates to the technical field of remote sensing images, in particular to an integrated aerial three-dimensional method for airborne laser scanning point clouds and optical images. Background technique [0002] Airborne LiDAR (Light Detection and Ranging) and aerial camera integrated system is a high-tech that has developed rapidly in the field of remote sensing in recent years. , realized the synchronous acquisition of high-precision surface geometric information and multispectral images, and improved the efficiency of remote sensing data acquisition and post-processing. The integrated processing of point cloud and image data can give full play to the advantages of both, and has great application potential. Due to the influence of various systematic errors, there is inevitably a systematic deviation in the positioning of the original point cloud and the image, and the two data cannot be directly aligned, which has an important impact on...

Claims

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Application Information

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IPC IPC(8): G01C11/34
Inventor 张靖江万寿王盛
Owner WUHAN UNIV
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