Video Synchronization Method Based on Homography

A technology of video synchronization and homography transformation, which is applied in the fields of video stitching, 3D reconstruction and video fusion, target tracking, image processing, and multi-video surveillance. It can solve the problems of large video synchronization errors and achieve a high correct matching rate.

Active Publication Date: 2019-08-13
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and propose a video synchronization method based on homography transformation, which is used to solve the problem in the prior art that the video synchronization error is relatively large when the moving object is moving non-planarly. technical problem

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  • Video Synchronization Method Based on Homography
  • Video Synchronization Method Based on Homography
  • Video Synchronization Method Based on Homography

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:

[0033] refer to figure 1 , a video synchronization method based on homography transformation, comprising the following steps:

[0034] Step 1), obtain the reference video of the scene and the video to be synchronized:

[0035] Using two uncalibrated (unknown frame rate, asynchronous start-up time) cameras to shoot the same scene containing multiple moving objects from different viewing angles, the first video V 1 and the second video V 2 , and place the first video V 1 As a reference video, the second video V 2 as the video to be synced.

[0036] Step 2), extract reference video V 1 The trajectory of the moving target and the background image I 1 , while extracting the video V to be synchronized 2 The trajectory of the moving target and the background image I 2 :

[0037] For reference video V 1 and the video to be synchronized V 2 ...

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Abstract

The invention discloses a video synchronization method based on homograph and is used for solving the technical problem that in the prior art, a video synchronization error is relatively high when moving targets carry out non-planar movement. The method comprises the realization steps of carrying out moving target trajectory extraction and background image matching on input videos; obtaining antipodal points of background images; normalizing moving target trajectories and feature points and antipodal points of the background images; through utilization of the background points, the antipodal points and trajectory points, obtaining initial trajectory point matched pairs based on the homograph, and removing wrong trajectory point matched pairs through adoption of epipolar geometry constraints; and extracting time information of the trajectory points, and calculating time model parameters between the input videos through utilization of a random sampling consistent algorithm. According tothe method, when the moving targets carry out the non-planar movement, a relatively high accurate matching ratio can be obtained, and the method is applicable to the field such as multi-video monitoring, target tracking, video splicing, three-dimensional reconstruction and video fusion.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a video synchronization method, in particular to a homography-based video synchronization method, which can be applied to the fields of multi-video monitoring, target tracking, video splicing, three-dimensional reconstruction, and video fusion. Background technique [0002] Video synchronization is a technology for time-calibrating multiple videos of the same dynamic scene recorded by two or more cameras that are not calibrated and placed at different viewing angles. The core goal of video synchronization is to establish multiple videos from the same physical moment. Correspondence between video frames to get the time model parameters between them. Video synchronization mainly includes two implementation methods: hardware method and software method. The hardware method is to use a specific device to make a time stamp symbol on each frame of the video sequence or to send a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/04G06T7/33
CPCG06T7/33G06T2207/10016H04N5/04
Inventor 张强邵蓓韩军功王龙
Owner XIDIAN UNIV
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