基于局部能量的电容层析成像图像融合方法  

Image fusion method based on local energy in electrical capacitance tomography

作　　者：陈德运[1] 钟陈[1] 王莉莉[1] 盛晓飞[1] 于晓洋[1] 

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,哈尔滨150080

出　　处：《计算机应用研究》2012年第5期1947-1950,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(60572153;60972127);高等学校博士学科点专项科研基金资助项目(200802140001);教育部春晖计划(Z2007-1-15013);黑龙江省自然科学基金资助项目(F200609);黑龙江省教育厅计划项目(11541040)

摘　　要：针对电容层析成像技术的"软场"效应和病态问题对重建图像精确度的影响,在分析电容层析成像基本原理和成像算法的基础上,提出了一种基于局部能量的电容层析成像图像融合方法。该方法以线性反投影、Landweber和共轭梯度算法作为图像重建的基础,利用各个图像的互补特性,经对重建的图像小波分解后,分别采用基于局部能量和加权平均算子融合规则对分解后图像的高频系数和低频系数进行图像的融合,得到准确度更高的成像结果。仿真实验结果表明,融合后成像精确度得到明显提高,缩小了误差,图像更接近原型,为ECT图像重建的研究提供了一个新的方法。＂Soft-field＂ nature and ill-posed problems to influence on the accuracy of image reconstruction in electrical capacitance tomography technology（ECT）,this paper presented a novel image fusion method based on local energy in the analysis of ECT basic principle and imaging algorithm.Meanwhile with linear back projection algorithm,Landweber algorithm and conjugate gradient algorithm as the basis for image reconstruction,this paper used the complementary nature of individual images,after wavelet decomposition of the reconstructed images,the more accurate images got through the integration of high-frequency coefficients and low frequency coefficients based on fusion rules of local energy and weighted averaging operator.The simulation results show that image accuracy significantly improved and removed redundant information after integration.This study provided a new method on ECT image reconstruction to make image closer to the prototype.

关 键 词：电容层析成像 图像重建 图像融合 局部能量 标准偏差 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]