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A time reference real-time calibration method and system for an image acquisition platform

An image acquisition platform and time reference technology, applied in the field of image processing, can solve problems such as inability to overcome time offset and attitude difference, and achieve the effects of eliminating wrong matching, ensuring accuracy, and improving accuracy

Active Publication Date: 2019-04-09
CHENGDU TOPPLUSVISION TECH CO LTD
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Problems solved by technology

[0008] Aiming at the problem that the existing digital image acquisition system of the mobile platform cannot overcome the problem of time offset and attitude difference, an image acquisition platform that aims to realize the time difference between the time stamp of the camera and the time stamp of the gyro sensor can be obtained in real time Time base real-time calibration method and system

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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0052] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0054] Such as figure 1 As shown, a time reference real-time calibration method of an image acquisition platfor...

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Abstract

The invention discloses a time reference real-time calibration method and system of an image acquisition platform. The method is applied to a mobile terminal and includes the following steps: S1 acquires the current frame image and the previous N frame images; S2 extracts the first frame image in the current frame image A feature point to form the first feature point set and the second feature point in the reference frame image to form the second feature point set; S3 the first feature point in the first feature point set and the second feature point set The second feature point of the second feature point is matched and filtered to obtain the first feature point pair set; S4 obtains the average overall displacement of the current frame image according to the first feature point pair set; S5. Extract the gyro data of the gyro sensor of the current frame image, according to the gyro The data acquires the overall displacement of the posture of the current frame image; S6 acquires the time difference between the time stamp of the camera and the time stamp of the gyro sensor according to the Kalman filter method, and calibrates the time difference to execute S1.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and system for real-time calibration of a time reference based on a mobile terminal image acquisition platform. Background technique [0002] With the rapid development of electronic technology, people use mobile terminals, drones and other mobile platforms for video collection applications more and more. However, because the video captured by mobile terminals or drones is prone to jitter and has poor visual effects, it usually cannot be used normally, and the captured video needs to be stabilized. The image stabilization methods of different video image acquisition platforms according to the principles mainly include three categories: mechanical image stabilization, optical image stabilization and electronic image stabilization. [0003] Mechanical image stabilization uses a shock-absorbing platform or a mechanical gimbal to passively offset various jitters. Its advanta...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/33
CPCG06T2207/20024
Inventor 晁志超龙学军周剑陆宏伟徐一丹
Owner CHENGDU TOPPLUSVISION TECH CO LTD
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