Method of calculating three-dimensional positions of ground points by using sequential satellite borne remote sensing images

Abstract

The invention provides a method of calculating three-dimensional positions of ground points by using sequential satellite borne remote sensing images. The method comprises the following steps: first,extracting two-dimensional image coordinates of the ground points on each satellite borne remote sensing image and calculating the three-dimensional auxiliary coordinates corresponding to the ground points on each satellite borne remote sensing image by using satellite sensitive quaternion parameters corresponding to each satellite borne remote sensing image; second, calculating the transformationcoefficient formed by any two satellite borne remote sensing images according to the satellite position corresponding to each satellite borne remote sensing image and the three-dimensional auxiliarycoordinates corresponding to the ground points; and finally, calculating the three-dimensional positions of the ground points by using the transformation coefficient, the satellite positions and the ground point auxiliary coordinates. The method directly calculates the three-dimensional positions of the ground points explicitly by applying platform parameters and camera parameters of the satelliteborne remote sensing images without initial approximate values of the ground points. Iterative and approximate processes are avoided in calculation, so that the calculating process is simplified effectively, and the method is more suitable for scaled engineering application.

Description

Technical field [0001] The present disclosure relates to the technical field of remote sensing image processing, and in particular to a method for calculating the three-dimensional position of a ground point by using a sequence of satellite-borne optical remote sensing images. Background technique [0002] Satellite-borne optical remote sensing images can only obtain ground two-dimensional image information after geometric positioning or geometric correction. In order to obtain ground three-dimensional position information, it is generally necessary to use stereo relative methods to obtain three-dimensional information of ground points. Stereo-relative is to calculate the three-dimensional position of the ground point based on the two images of the same area obtained by using the spatial geometric relationship. The conventional processing flow is to go through two processes of relative orientation and absolute orientation, and each process requires more complicated non- Linear it...

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Problems solved by technology

[0003] Using serialized satellite optical remote sensing images to calculate the three-dimensional position of ground points, it is also possible to extract two images from the sequence images at a time to perform the conventional relative orientation and absolute orientation complex non-linear iterative calculation process, and then combine all the calculated The results are integrated to find the optimal value of the ground point, but the serialized images with a large amount of data will make the calculation process very complicated, which is not suitable for large-scale engineering applications

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