基于改进电极敏感场的ECT图像重建算法研究  

Research on Image Reconstruction Algorithm of ECT Based on Improved 12-Electrode Sensitive Field

作　　者：龚君 王丽 周涛[2] GONG Jun;WANG Li;ZHOU Tao(Department of Mechanical and Electrical Engineering,Zhengde Vocational and Technical College,Nanjing Jiangsu 211106,China;Southeast University School of Energy and Environment,Nanjing Jiangsu 210096,China)

机构地区：[1]正德职业技术学院机电工程系,江苏南京211106 [2]东南大学能环学院,江苏南京210096

出　　处：《电子器件》2021年第2期393-398,共6页Chinese Journal of Electron Devices

基　　金：东南大学学科振兴计划和教师启动基金项目(1103007005-2020)。

摘　　要：针对目前电容层析成像技术中重建图像质量有待提高的问题,对该技术正问题和反问题的改进方法进行了研究。通过将电极数目由传统的8电极增加至12电极来增加投影数据,从而改善图像重建的欠定性,并且在12电极敏感阵列的基础上对其灵敏度矩阵进行了均值滤波的改进处理,基于处理后的灵敏度矩阵对经典图像重建算法LBP算法和Landweber迭代算法进行了改进,仿真研究结果表明,基于敏感场滤波处理后的2种算法较之于原始算法成像精度明显提高。且2种算法中,改进后的Landweber迭代法成像效果更好。In view of the current situation that the quality of reconstructed image needs to be improved in capacitance tomography technology, the improvement methods of positive and negative problems in capacitance tomography technology are studied. By increasing the number of electrodes from 8 electrodes to 12 electrodes to increase the projection data, so as to improve the pathology of image reconstruction, and the sensitivity matrix of 12 electrodes sensitive array is processed by mean filtering. Based on the sensitivity matrix, the LBP algorithm and Landweber iterative algorithm are improved. The results of simulation show that the imaging accuracy of the two algorithms based on sensitive field filtering is significantly higher than that of the original algorithms. In the two algorithms, the improved Landweber iterative method has better imaging effect.

关 键 词：电容层析成像 电极数目 灵敏度 均值滤波 图像重建算法 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]