A method and device for three-dimensional imaging of satellite-borne SAR in ascending and descending orbits based on geometric matching

Abstract

The present disclosure provides a three-dimensional imaging method for spaceborne SAR in ascending and descending orbits based on geometric matching, including: obtaining SAR ascending orbit images and descending orbit images; The scale factor of the center point of the first scene and the center point of the second scene in the descending orbit image; respectively perform feature extraction, image segmentation, binarization and morphological processing on the ascending orbit image and descending orbit image, and obtain the contour features of the ascending orbit image and the contour features of the descending orbit image; feature matching is performed between the contour features of the ascending orbit image and the descending orbit image to obtain the feature offset between the ascending orbit image and the descending orbit image; according to the scale factor and the feature offset, we get Three-dimensional imaging map of ground objects. The present disclosure also provides a spaceborne SAR three-dimensional imaging device, electronic equipment, storage media and computer program products based on geometric matching of lifting rails.

Description

technical field [0001] The present disclosure relates to the technical field of synthetic aperture radar imaging, and in particular to a three-dimensional imaging method, device, electronic equipment, storage medium, and program product based on geometric matching for spaceborne SAR on ascending and descending orbits. Background technique [0002] Synthetic aperture radar (SAR) has been widely used in the acquisition of earth observation data due to its all-time and all-weather characteristics. Spaceborne SARs carried by spacecraft such as satellites have global imaging capabilities. It has played an irreplaceable role in global military reconnaissance, environmental remote sensing, natural disaster monitoring, and planetary exploration. The spaceborne SAR adopts the conventional mode, and the acquisition of SAR images from one side angle can only obtain the limited angle information of the target. However, the backscattering properties of targets in real scenes are anisot...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the embodiment of the present disclosure provides a three-dimensional imaging method, device, electronic equipment, storage medium and program product based on geometric matching for ascending and descending rail spaceborne SAR, aiming to solve the problem of brightness in the ascending and descending rail image. There are large differences in deformation and deformation, and it is difficult to match single-point points with the same name and other technical problems

Images