Video image stabilization method and device

Abstract

The invention provides a video image stabilization method, and the method comprises the steps: calculating the internal reference of a camera and the included angle between the camera and a gyroscopethrough the feature point matching pair of two adjacent frames of images in a test video, wherein the camera comprises a CMOS sensor; establishing a gyroscope cumulative pose list, wherein the gyroscope cumulative pose list comprises a gyroscope angular velocity acquisition moment and a cumulative pose corresponding to the gyroscope angular velocity acquisition moment; reading a to-be-processed frame image, wherein the frame image comprises a frame cache and the reading moment of each pixel row, and estimating the accumulated pose of the camera at the reading moment of each pixel row accordingto the included angle and the accumulated pose list of the gyroscope; correcting the accumulated pose of the camera at each pixel row reading moment according to the accumulated pose of the camera atthe first pixel row reading moment; and carrying out smoothing processing on the corrected accumulated 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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