Then approximate wave impedance is computed after background velocity has been obtained by making constant-velocity scanning.
并在常速扫描取得背景速度的基础上计算近似波阻抗。
This system can realize the detection of the non-rigid moving object and the estimation of the background velocity through the Level-Set method and piece-wise smooth motion field constraint.
该系统采用水平集方法，利用分段平滑运动场的约束条件，实现非刚体运动目标检测和背景的运动估算。
Considering the properties of low stack folds, shallow objected layers and big background noise of shallow seismic data, the parameters selection for velocity analysis is studied in the paper.
针对浅层地震资料目的层较浅、叠加次数少和城市背景干扰大等特点，文中对速度分析的参数选取问题进行了研究。
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