基于非接触式电阻抗层析成像图像融合方法  

Image Fusion Method Based on Non⁃Contact Electrical Impedance Tomography

作　　者：贾惠芹[1] 席炜 周亚群[2] 王小鑫 JIA Huiqin;XI Wei;ZHOU Yaqun;WANG Xiaoxin(Key Laboratory of Oil and Gas Well Measurement and Control Technology of Shaanxi Province,Xi’an Shiyou University,Xi’an Shaanxi 710065,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an Shaanxi 710054,China)

机构地区：[1]西安石油大学陕西省油气井测控技术重点实验室,陕西西安710065 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《传感技术学报》2023年第6期922-927,共6页Chinese Journal of Sensors and Actuators

基　　金：陕西省自然科学基础研究计划项目(2022JM-314);西安市科技计划项目(21XJZZ0058)。

摘　　要：电学层析成像技术中的不适定问题和非线性问题影响了图像重建的质量。为提高重建图像的精度,提出一种可变阈值的改进滤波器图像融合算法。通过非接触阻抗传感器提取输出电压的实部、虚部和相位分量,使用Landweber算法分别对这三种分量进行图像重建,运用可变阈值的改进滤波器图像融合算法对三种图像进行图像融合,并通过仿真及实测分析了水相电导率对成像效果的影响。实验结果表明:随着水相电导率的增加,实部图像、虚部图像和相位图像的精度呈下降趋势;而使用图像融合后重建的图像轮廓更加清晰,介质分布、形状及大小均与原图较为接近,图像重建精度更高。Electrical tomography has ill⁃posed and nonlinear problems,which affect the quality of reconstructed image.In order to improve the accuracy of reconstructed image.A variable threshold improved logical filtering(VTILF)image fusion algorithm is presented.The real part,imaginary part and phase part of the output voltage are extracted by the non⁃contact impedance sensor,and the images of these three components are reconstructed by using the Landweber algorithm respectively.Then the three images is fused by using the variable threshold improved logical filtering image fusion algorithm.Meanwhile,the influence of water phase conductivity on the imaging effect is analyzed through simulation and measurement.The results of simulation experiments show that with the increase of water phase conductivity,the values of the accuracy of real part image,imaginary part image and phase image show a downward trend.However,the reconstructed image contour after image fusion is clearer,the medium distribution,shape and size are close to the original image,and the image reconstruction accuracy is more accurate.

关 键 词：电阻抗层析成像 图像融合 Landweber算法 可变阈值改进滤波器方法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TH86[自动化与计算机技术—计算机科学与技术]