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Time synchronizing method and system for multi-view video collection

A multi-view video and video acquisition technology, which is applied in the field of video and image processing, can solve problems such as time error, inability to achieve accurate synchronization at the millisecond level, and inaccurate waiting time, so as to avoid synchronization failure and long-term waiting , low cost effect

Inactive Publication Date: 2007-08-08
PEKING UNIV
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Problems solved by technology

However, in ordinary non-real-time multitasking operating systems, the waiting time for calling this command is not accurate. The actual measurement results show that the error values ​​​​are different in different machines and different multitasking operating environments, and it is impossible to achieve milliseconds. precise synchronization
Finally, each video capture machine calls the video capture program to start the camera hardware for video capture after obtaining time synchronization. However, the start time of the capture program is different in different machines and different operating environments, which further introduces time errors. , the measured results show that the error can sometimes be as high as 100 milliseconds

Method used

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  • Time synchronizing method and system for multi-view video collection

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] As shown in Figure 1, the multi-viewpoint video acquisition system applicable to the present invention is made up of a synchronous server 1, a plurality of video acquisition machines 2 and a plurality of cameras 3, wherein between the synchronous server 1 and each video acquisition machine 2 through a local area network 4 connected; each video capture machine can be connected to one or more cameras 3 at the same time, and control the video data acquisition process of multiple cameras 3 by loading multiple video capture programs 21; in each video capture program 21 , in addition to the existing camera driver module 22, a new synchronization control module 23 also needs to be added, which interacts with the synchronization server 1 through the local area network 4 on the one hand, and actually starts the camera 3 by calling the camera driver modul...

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Abstract

The invention relates to one time simultaneous method and system for multi-point visual point, which comprises the following steps: a, using network time agreement to process all device simultaneous operations; b, separately starting one collection program on collectors for each camera; c, visual collection program monitors control order from servo; d, the servo detects local network maximum reverse time; e, the servo adds current system time and the maximum reverse time as pre-set collection time sent to each collection program; f, collection program compares the current system time and pre-set collection time, if it supers then starting visual data collection.

Description

technical field [0001] The invention relates to a video and image processing method and system, in particular to a time synchronization method and system for multi-viewpoint video acquisition. Background technique [0002] Multi-view video includes multiple video sequences captured simultaneously by multiple cameras from multiple different positions and angles for the same object. Compared with traditional single-point video, multi-view video can provide different angles and different levels of information of a certain object or scene, and can synthesize these information to generate multi-angle, all-round free or stereoscopic vision. Raw data of multi-viewpoint video is generally collected by a collection of multiple cameras, and different types of multi-viewpoint video data are generated according to different arrangements of cameras. [0003] The first step in constructing a multi-viewpoint video system is the acquisition of multiple viewpoint video data. Due to the lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/09H04N7/56H04L7/00H04N23/13
Inventor 霍龙社王威高文
Owner PEKING UNIV
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