Robust video SAR image sequence registration method

Abstract

The invention provides a robust video SAR image sequence registration method. According to the technical scheme, the method comprises the following steps: firstly, setting a first frame of SAR image as a reference frame of image, and calculating a registration transformation matrix of all adjacent image pairs in a video SAR image sequence; then, for each frame of SAR image, adopting an inter-frameaccumulation method to multiply the related registration transformation matrix, and acquiring a registration transformation matrix between each frame of SAR image and the reference frame of image; and finally, transofmring all frames of SAR images in the video SAR image sequence to the space coordinate reference where the reference frame of image is located based on the registration transformation matrix, so that an accurate and steady registration result of the video SAR image sequence is obtained. The video SAR image sequence registration method effectively solves the problems of low registration precision, poor robustness, low operation speed and the like of an existing registration algorithm in video SAR image sequence registration.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a robust video SAR (Synthetic Aperture Radar, Synthetic Aperture Radar) image sequence registration method. Background technique [0002] Video SAR is a brand-new space-to-ground reconnaissance technology. It realizes dynamic observation of the ground state through high-frame rate and high-resolution imaging of the scene, and grasps relevant information of the target area in real time, especially the state and position of the moving target. information. Video SAR image sequence registration is the first step to realize the state perception of video SAR moving targets, and it is also a key step in the preprocessing of video SAR image sequences. Under the space coordinate datum. [0003] The SAR image sequence obtained by using the video SAR system is several frames of SAR images arranged in time sequence, so the SAR image registration method can be applied to th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a robust video SAR image sequence registration method, which effectively solves the problems of low registration accuracy, poor robustness, and computational speed in the video SAR image sequence registration of existing registration algorithms. slow etc.

[0006] The beneficial effects of the present invention are: based on the feature point matching method, the high-precision registration of adjacent frames is realized, the integral image and the box filter are introduced, thereby effectively improving the calculation speed; further, through inter-frame accumulation, the existing The algorithm has problems such as low registration accuracy and poor robustness when the image frame interval is large

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