基于小波域的运动估计方法的实现

Study of Motion Estimation Based on the Wavelet Domain

基于块匹配的运动估计是降低视频序列图像帧间冗余度的一项关键技术 ,但巨大的运动估值运算量和块效应制约了它的实际应用。在小波域中 ,根据子图像之间的相关性 ,可以由对最低频子图像作运动估计获得的位移矢量去预测其余子图像的位移矢量 ,提高了检测精度并减少了运算量和块效应 。

Although block-based motion compensation has been widely used for the removal of temporal redundancy existing image sequence coding, the intensive computational consuming is a bottleneck. According to the subimages correlation in wavelet domain, the displacement vectors of the other subimages could be predicted by which coming from the motion estimation of the lowest frequency subimages. Such a method increases the detection accuracy effectively and reduces the calculation and blocking effect.