极移的线性漂移速率在Y分量上比较明显。
The drift in average position is very obvious in the Y-coordinate.
方案二，由连续两帧求出残差，在残差分量上嵌入置乱水印。
The second scheme:residual part is obtained by subtracting consecutive frames, the watermark is embeded into the residual part.
转换波的横波静校正量，可以利用x分量上记录的横波信息来解决；
The quantity for shear-wave statics can be derived solely from the shear-wave information in X-component.
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