基于抖动帧检测和低通滤波的数字视频稳像算法

近年来，数字视频稳像方法是提高视频质量的重要研究内容之一.针对高斯滤波使用固定高斯核进行运动平滑，去除抖动能力有限的问题，提出根据视频帧抖动程度使用不同低通滤波进行运动平滑的方法.首先，计算当前帧与其前后固定半径范围内相邻帧之间的位移量，并计算其位移方差，该方差可以有效地描述视频帧的抖动程度；其次，根据抖动程度使用自适应滤波或均值滤波进行运动平滑.实验证明，该方法比现有的方法具有更好的稳像效果.

A network congestion control method based on cellular genetic

In recent year, digital video stabilization is one of the important research fields of video quality improvement. To solve the inefficient of Gaussian filtering that perform motion smoothing by a constant Gaussian kernel, a novel motion smoothing method was proposed. Firstly, the displacements between current frame and its neighboring frames are calculated, the variance of the displacements is also calculated, which can measure the jitter of frame effectively. Then, smoothed motion can be obtained by an adaptive filter or a mean filter with respect to the variance. The experimental results showed that proposed method is superior to the existing method.