A method and device for off-line synchronization of telemetry data and video image data
A technology of telemetry data and video images, which is applied in the field of offline synchronization of telemetry data and video image data, and can solve problems such as large computing resources and time, low efficiency, and large amount of computation
Active Publication Date: 2020-02-07
TIANJIN AEROSPACE ZHONGWEI DATA SYST TECH CO LTD +1
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Problems solved by technology
[0003] In order to solve the problem of data synchronization, an existing method is to use a manual method to compare and synchronize according to the position of the drone and the video content. This method is not only time-consuming and laborious, but also the synchronization results are not ideal due to the limitations of manual processing.
Another approach is to use the image matching method to calculate the relative position. Because the image matching algorithm has a large amount of calculation, low efficiency, and consumes too much computing resources and time, it cannot be effectively applied in actual video processing.
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[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0043] figure 1 It is a schematic flowchart corresponding to an offline synchronization method of telemetry data and video image data provided by an embodiment of the present invention, as shown in figure 1 As shown, the method includes:
[0044] Step 101, obtaining telemetry data and video image data to be synchronized;
[0045] Step 102, analyzing and motion coding the acquired telemetry data to obtain comprehensive motion coding ba...
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The embodiment of the invention discloses an off-line synchronization method and device for telemetry data and video image data. In the embodiment of the present invention, the comprehensive motion coding based on the telemetry data and the comprehensive motion coding based on the video image data are respectively obtained according to the telemetry data and the video image data, and then the telemetry data is interpolated according to the matching result. Due to the sampling frequency of the telemetry data The sampling frequency is lower than the video image data, after matching and interpolation processing, the telemetry data corresponding to the image frame in the video image data can be obtained, which not only realizes the synchronization of video image data and telemetry data, but also ensures the accuracy of synchronization; Moreover, in the embodiment of the present invention, the grayscale projection method is used for motion estimation, which greatly improves the efficiency of motion estimation, and further improves the efficiency of data synchronization as a whole.
Description
technical field [0001] The invention relates to the technical field of unmanned aerial vehicle data processing, in particular to an off-line synchronization method and device for telemetry data and video image data. Background technique [0002] During the flight of the UAV, the video image data and the telemetry data are recorded and stored separately (the video image data is generated and stored by the payload of the UAV, and the telemetry data is generated and stored by the flight control system), and are separated after the flight. Generate video image data files and telemetry data files. Due to factors such as communication delays and unstable links, video image data and telemetry data are often asynchronous, that is, video image data and telemetry data cannot be mapped one-to-one. However, with the promotion of UAV applications, the analysis and further deepening and refinement of UAV data require synchronous processing of UAV telemetry data and video image data. [...
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IPC IPC(8): G06K9/62
CPCG06F18/22
Inventor 赵恩伟王厚军李丹伍小洁胡楠韩艳艳任婧李成龙李思雅
Owner TIANJIN AEROSPACE ZHONGWEI DATA SYST TECH CO LTD