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A kind of video satellite in-orbit video stabilization method

A technology for video image stabilization and satellite, applied in the field of video satellite on-orbit video image stabilization, which can solve the problems of unfavorable on-board embedded implementation, complex hardware structure, and high algorithm complexity

Active Publication Date: 2020-07-31
CHANGGUANG SATELLITE TECH CO LTD
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Problems solved by technology

[0004] In order to solve the problem that the existing video satellite image stabilization method has complicated hardware structure and high algorithm complexity, which is unfavorable for on-board embedded implementation, the present invention provides an on-orbit video image stabilization method for video satellites

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  • A kind of video satellite in-orbit video stabilization method
  • A kind of video satellite in-orbit video stabilization method
  • A kind of video satellite in-orbit video stabilization method

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specific Embodiment approach 1

[0037] Specific implementation mode 1. Combination Figure 1 to Figure 5 Describe this embodiment mode, a kind of video satellite on-orbit video image stabilization method, this method is realized by the following steps:

[0038] 1. Image preprocessing;

[0039] Step 1, image preprocessing;

[0040] a. Image selection in the phase-related region: read two frames of video images continuously, and record them as reference images I 1 and the image to be stabilized I 2 , and the specific regions of the two images are intercepted and denoted as image I' 1 and image I' 2 ,

[0041] In this embodiment, for a 5K*4.5K video image, the area set is the roi×roi part of the image center, and the variance of this area is judged; if the variance is small, in this embodiment, it is considered that for an 8bit image, the variance is less than At 7 o'clock, it is considered that the image detail information in this area is less suitable for subsequent phase correlation calculations, and t...

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Abstract

An on-orbit video image stabilization method for video satellites, relating to an on-orbit video image stabilization method for video satellites, solving the problems of complex hardware structure and high algorithm complexity in existing video satellite image stabilization methods, which are not conducive to on-board embedding To solve the problem of formula realization, the present invention adopts the method of phase correlation + image interception + optical flow image stabilization to stabilize video satellite images. First, according to the characteristics of existing video satellite imaging, the difference between two consecutive frames of images is mainly translation, and the phase correlation method is used to judge the amount of image translation; then, the corner points of the intercepted small image are calculated to generate the global image corresponding to the original image Corner points; finally, the optical flow and RANSAC methods are used to achieve high-precision image stabilization, which avoids the inherent precision error of on-board positioning and attitude determination equipment on the image stabilization. In the experiment, the video images downloaded from the video satellite of Changguang Satellite Technology Co., Ltd. were used , verified the practicability of the invention.

Description

technical field [0001] The invention relates to an on-orbit video image stabilization method for video satellites, which can realize on-orbit fast and high-precision image stabilization, is applied to video satellites with a staring imaging mode, and can provide on-orbit identification, detection and tracking of moving targets. Stabilized video image. Background technique [0002] Today, video satellites have a variety of imaging modes: push-broom, area array, night light, and staring imaging, among which staring imaging can obtain the running information of moving targets, making it an indispensable and important working mode for video satellite design. In order to improve the timeliness of moving target information acquisition and further increase the value of video satellite remote sensing, on-orbit target detection, recognition and tracking are required, thus requiring multi-frame video images to maintain a constant spatial position. However, due to the satellite space ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40H04N5/21
CPCG06T3/4084H04N5/21
Inventor 于树海贺小军钟兴于渊博
Owner CHANGGUANG SATELLITE TECH CO LTD
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