成像测井图像的动态增强及Morphing方法

The Method of Image Dynamic Intensify and Morphing in Imaging Log

未经图像学处理的成像测井原始图像对地层特征的反映通常并不明显。静态标准化图像亮度大,适合于观察变化范围较大的测井响应和岩性对比分析结果。动态增强图像增加了井孔特殊区域的特征清晰度,但所用的短窗长会使图像出现台阶现象,平滑滤波、重采样都不能很好地消除这种台阶。在用图像直方图局部均衡化实现动态增强研究的基础上,采用Morphing技术对颜色进行线性插值,即用一个控制序列控制图像渐变过程,在颜色混合时消除中间帧图像上的一些不良表现,对动态增强图像台阶上下作颜色线性插值,使图像渐变。结果表明此方法能够有效地解决由于图像动态增强而产生的台阶问题。

Imaging log is used widely for its higher discernibility, but the firsthand image usually reflect formation feature indistinctly. Static state normalization image is applicable to display logging response with large variable range and lithology analysis result. Dynamic intensify image increases its definition in borehole zone, but makes the image step-shaped because of the use of narrow window. Both of smoothing filtering or re-sampling cannot remove the step. Based on histogram local equalization method, this paper utilizes Morphing technique to do linear interpolation to the color data to smooth the step. The result shows that the step problem can be effectively resolved in this way.