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电视测井采集到的原始视频图象经过几何空间变换 ,图象象素重采样 ,最终生成可供地质分析解释的井壁表面图象文件。此外 ,必须动态识别指北针的图象以确定井下探头的方位 ,并以识别的北方位为起点完成图象的几何空间变换。基于井场施工效率和井下探头的安全原因 ,探头在井中以 4cm/s左右的速度下落 ,图象处理过程必须与探头的下落保持同步 ,因而还具有一定程度的实时性要求。
The original video image collected by the TV logging is geometrically transformed and the image pixels are resampled to finally generate the surface image of the borehole surface for geological interpretation. In addition, the compass image must be dynamically identified to determine the orientation of the downhole probe, and the geometric transformation of the image is accomplished using the identified north orientation as a starting point. Based on the site construction efficiency and the safety reason of the downhole probe, the probe falls in the well at a rate of about 4 cm / s. The image processing process must keep pace with the probe’s drop and therefore has a certain degree of real-time requirements.