The original motion mask image can be extracted from the high frequency frames which resulting from temporaldecomposition of the original video sequence by wavelet transform.
将视频序列进行时间轴一维小波变换，利用变换后的高频帧信息提取出初步的运动掩模图像；
2
Temporal change feature is extracted from the visual image sequence using temporaldecomposition based on wavelet, which reflects the dynamical content variation at a pixel at any time.