Optical satellite video image stabilization method and system with geocodes
An optical satellite and geocoding technology, which is applied in the field of optical satellite video image stabilization method and system, can solve problems such as difficult to achieve sub-pixel level video image stabilization, unable to guarantee the geometric quality of video image stabilization, and difficult to take into account lens distortion and geometric deformation, etc.
Inactive Publication Date: 2020-04-14
WUHAN UNIV
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Although these video image stabilization models are simple and easy to use, they face two main problems for optical video satellites: 1) It is difficult to take into account the geometric deformation caused by lens distortion and terrain fluctuations, and as the spatial resolution of the video camera and the video width increase With continuous improvement, the geometric deformation between frames will become more and more obvious, so that it is difficult to achieve sub-pixel-level video stabilization with these video image stabilization models
It can be seen that it is difficult to fully describe the influence of many error sources on the geometric relationship between video image frames by using the traditional simple video image stabilization model, so that the geometric quality of video image stabilization cannot be guaranteed.
2) For the users of optical video satellites, it is usually necessary to obtain the geometric information of the target of interest from the video data, such as the position and velocity of the moving target, and the video data obtained by using the traditional video image stabilization model for video image stabilization processing will be Difficult to meet the needs of this application
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[0072] In order to more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings and obtain other implementation.
[0073] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0074] In the embodiment of the present invention, on the basis of the orientation model of the optical satellite video image, an inter-frame geometric correction model of the sub-frame image is constructed, and the inter-frame geometric correction parameters are used to correct the orientation parameters of the sub-frame image, and then the corrected orientation parameters are us...
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The invention discloses an optical satellite video image stabilization method and system with geocodes, and the method comprises the steps: sequentially taking a former frame of two adjacent frames ofvideo images as a main frame and a latter frame of two adjacent frames of video images as an auxiliary frame, and obtaining a plurality of pairs of main frame and auxiliary frame images; carrying outinter-frame matching on the video images to obtain a matching point between each pair of main frame and auxiliary frame images; constructing a video image inter-frame geometric correction model; solving an inter-frame geometric correction parameter of the auxiliary frame image; performing inter-frame geometric correction on the orientation parameters of the auxiliary frame image to obtain corrected orientation parameters; and geocoding the video image to obtain a stable image with geocoding. According to the invention, while the image stabilization precision of the optical satellite video image is ensured, the obtained image stabilization image has geocoding, so a user can directly obtain geometrical information of a target of interest from video data.
Description
technical field [0001] The invention belongs to the technical field of geometric processing of optical satellite video images, in particular to an optical satellite video image stabilization method and system with geographic coding. Background technique [0002] The video camera carried on the optical video satellite can obtain high-frequency time-series images of the target area through staring imaging mode. Using these high-frequency time-series images, continuous observation of the motion process can be realized, which is especially suitable for the tracking and analysis of the instantaneous characteristics of moving targets such as aircraft and ships, as well as the real-time monitoring of high-dynamic and short-time-slot phenomena such as forest fires and floods. [0003] In order to give full play to the effectiveness of optical video satellites, it is first necessary to solve the problem of image stabilization of video images. The accuracy of video image stabilizatio...
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IPC IPC(8): H04N5/21G06K9/46G06K9/62
CPCH04N5/21G06V10/462G06V10/751
Inventor 曹金山张致齐王密
Owner WUHAN UNIV