Digital image processing of saturation for two-phase flow in planar porous media model  

作　　者：Zhi DOU Zhi-fang ZHOU Si WANG Yong HUANG 

机构地区：[1]School of Earth Sciences and Engineering,Hohai University,Nanjing 210098,R R.China

出　　处：《Water Science and Engineering》2012年第2期202-209,共8页水科学与水工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No51079043);the Special Fund for Public Welfare Industry of Ministry of Water Resources of China(Grants No200901064 and 201001020);the Research Innovation Program for College Graduates of Jiangsu Province(Grant No CXZZ11_0450)

摘　　要：In this paper, the accuracy of estimating stained non-wetting phase saturation using digital image processing is examined, and a novel post-processing approach for calculating threshold is presented. In order to remove the effect of the background noise of images and to enhance the high-frequency component of the original image, image smoothing and image sharpening methods are introduced. Depending on the correct threshold, the image binarization processing is particularly useful for estimating stained non-wetting phase saturation. Calculated saturation data are compared with the measured saturation data during the two-phase flow experiment in an artificial steel planar porous media model. The results show that the calculated saturation data agree with the measured ones. With the help of an artificial steel planar porous media model, digital image processing is an accurate and simple method for obtaining the stained non-wetting phase saturation.

关 键 词：digital image processing ＂ saturation ＂ two-phase flow ＂ planar porous media model 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TB42[自动化与计算机技术—计算机科学与技术]