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In-orbit video image stabilizing method for video satellite

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

Active Publication Date: 2017-09-29
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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  • In-orbit video image stabilizing method for video satellite
  • In-orbit video image stabilizing method for video satellite

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specific Embodiment approach 1

[0038] 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:

[0039] 1. Image preprocessing;

[0040] Step 1, image preprocessing;

[0041] 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 ,

[0042] 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

The invention relates to an in-orbit video image stabilizing method for a video satellite, which solves the problem that the existing video satellite image stabilizing method having complex hardware structure and high algorithmic complexity is unbeneficial to satellite embedded implementation. A video satellite image is stabilized by adopting the methods of phase correlation, image interception and light stream image stabilization. The method comprises the steps of firstly, according to the existing video satellite imaging characteristic, translating two frames of images based on the difference, and judging the image translation quantity by adopting the phase correlation method; then calculating corners of a small intercepted image, and generating global corners corresponding to the original images; and finally, implementing high-precision image stabilization by adopting light stream and an RANSAC (Random Sample Consensus) method. The method avoids the influence of inherent accuracy error of satellite positioning and orientating equipment on image stabilization, and the practicability of the method is verified by adopting a video image transmitted by the video satellite of Changguang Satellite Technology Co., Ltd. in experiments.

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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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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