参考帧是过去的某个帧，可以从中提取某些像素，以及运动矢量偏移索引。
The reference frame is a past frame from which to grab pixels from and the motion vectors index an offset into that frame.
虚速度剖面制作质量的好坏主要取决于提取子波时测井约束的效果、水平叠加偏移剖面的质量、叠加速度的选取和平滑作用以及各处理参数的选择。
The quality of psedu-velocity depends on the result of log-constraining when wavelet was obtained, the quality of original stacking migration section and the selection of all processing parameters.
利用多极子阵列声波测井资料提取直达斯通利波、计算斯通利波中心频率偏移和时间延迟来进行地层渗透率反演的方法已被研究了多年。
In this paper, developed are a method and correspondent software for calculating formation permeability from the center frequency shift and travel time delay in direct Stoneley wave.
此方法用于实际数据，结果证明该方法提取的偏移速度模型非常接近真实的速度。
Applying this approach to real data shows that the estimated migration velocity reliably converges to the correct velocity.
所以利用曲线拟合方法很容易实现全部地震岩性参数的反演，并可提取零偏移距剖面。
Consequently, with the use of curve fitting method, the inversion of all seismic lithologic parameters can be easy achieved, and zero-offset section can be obtained.
本系统采用最优阈值变换提取目标物体轮廓，完成了一个能够实现对气泡的偏移进行检测和对图像的状态进行模式识别的图像处理和识别系统。
The calibration system utilizes the combination of advantages of optimal thresholding and contour tracking to analyze the image of air bubble and recognize its features.
本系统采用最优阈值变换提取目标物体轮廓，完成了一个能够实现对气泡的偏移进行检测和对图像的状态进行模式识别的图像处理和识别系统。
The calibration system utilizes the combination of advantages of optimal thresholding and contour tracking to analyze the image of air bubble and recognize its features.
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