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在多相渗流实验中，由于流体分布图像往往模糊不清，特别是相界面很难用肉眼辨识，所以一般只能得到定性的与论。讨论了在多相渗流实验中应用图像处理技术的基本原理和典型算法，包括指进、剩余油分布分形线数的计算方法。介绍了基于上述理论研究编制的渗流图像处理系统PIS系列软件的功能及其优点。PIS系统可实现渗流图像格式转换、平移、亮度增强、二值化、二值化参数拟合、测定前缘分形维数和确定饱和度分布等，不仅简化渗流图像的分析工作，而且可方便地进行定量研究。PIS系统在沙流领域具有重大应用价值，也可应用于岩心薄片分析、孔隙结构分析、矿物成分确定和薄膜分析等相关领域。
In the multi-phase seepage experiment, the image of the fluid distribution is often blurred, especially the phase interface is difficult to identify with the naked eye, so we can only get qualitative and theory. The basic principle and typical algorithms of applying image processing technology in multiphase seepage experiments are discussed, including the calculation method of fractal line number referring to the residual oil distribution. The functions and advantages of PIS software based on the above theoretical study are introduced. PIS system can realize percolation image format conversion, translation, brightness enhancement, binarization, binarization parameter fitting, determination of leading edge fractal dimension and determination of saturation distribution, which not only simplifies the analysis of seepage images, but also conveniently Quantitative research. PIS system has great application value in the field of sand flow. It can also be used in related fields such as core slice analysis, pore structure analysis, mineral composition determination and thin film analysis.