Method and device for video image stabilization

Abstract

The present invention provides a video image stabilization method, the method comprising: using the matching pairs of feature points of two adjacent frames of images in the test video to calculate the internal reference of the camera, the angle between the camera and the gyroscope, and the camera includes a CMOS sensor; Set up the gyroscope cumulative pose list, the gyroscope cumulative pose list includes the gyroscope angular velocity collection moment and the cumulative pose corresponding to the gyroscope angular velocity collection moment; read the frame image to be processed, the frame image includes Frame buffer, the reading time of each pixel row, according to the angle and the gyroscope cumulative pose list, estimate the cumulative pose of the camera at the time of reading each pixel row; The pose corrects the cumulative pose of the camera at the time of reading each subsequent pixel row; smoothes the corrected cumulative pose of the camera.

Description

technical field [0001] The present invention relates to the field of video processing, in particular to a video image stabilization method and device. Background technique [0002] With the popularity of mobile phones and the continuous improvement of their performance, high-quality videos can be shot without professional camera equipment. However, in the process of shooting, unstable video is often output due to hand shaking, which will lead to poor viewing effect of the video, or be unfavorable for post-processing of the video. The purpose of video image stabilization technology is to eliminate the jitter component in the video and form a relatively stable video output. [0003] The basic methods of stabilizing video images can be divided into three categories: optical image stabilization, mechanical image stabilization and electronic image stabilization. Optical image stabilization requires sophisticated optical instruments, resulting in high cost, and is generally only...

AI Technical Summary

Problems solved by technology

[0004] However, the gyroscope will have a large deviation, making the stabilized video tilt at a fixed angle or rotate at a fixed angular velocity

In order to solve this problem, the gyroscope needs to be calibrated before video stabilization or when the phone is turned on. Waiting for the gyroscope calibration will degrade the user experience, and the gyroscope will still have accumulated deviations after long-term shooting, resulting in image stabilization effects bad

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