基于多帧重建的电阻抗动态成像的触摸跟踪  

Dynamic imaging of touch tracking based on multi-frame reconstruction in electrical impedance tomography

作　　者：朱俊[1] 郑文栋 葛泉波 刘华平[2] ZHU Jun;ZHENG Wendong;GE Quanbo;LIU Huaping(School of Automation,Nanjing University of Information Science and Technology,Nanjing 210044,China;Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]南京信息工程大学自动化学院,江苏南京210044 [2]清华大学计算机科学与技术系,北京100084

出　　处：《智能系统学报》2024年第6期1458-1467,共10页CAAI Transactions on Intelligent Systems

基　　金：国家自然科学基金国际合作重点项目(62120106005);中国博士后科学基金项目(2022M711825).

摘　　要：触觉传感对于人机交互非常重要,为提高触摸传感的实时性与精确度,提出一种结合电阻抗成像技术的触摸交互方法。该方法利用多数据帧的动态图像重建方法,通过构建多帧正则化模型,充分挖掘相邻数据帧之间存在的时间相关性信息。为验证该方法的有效性,设计一套压阻式触觉传感系统,该系统采用多层组合结构,能够实现对触摸压力变化的实时响应,并进行了触摸压力的测量、离散触摸跟踪和连续触摸跟踪的实验研究。实验结果表明,与传统的单帧静态成像方法相比,所提出的多帧重建算法能显著减小运动过程中重建图像的位置误差、形变和伪影,与实际触摸位有更高的吻合度,能够为人机交互领域的触摸传感提供一种有效途径。Touch sensing is of considerable importance to human–machine interaction.A touch interaction method integrating electrical impedance tomography(EIT)is proposed to enhance the real-time responsiveness and accuracy of touch sensing in human–machine interaction.This method employs a dynamic image reconstruction approach based on multiple data frames to construct a multiframe regularization model and fully mine the temporal correlation information between adjacent frames.An EIT-based resistive tactile sensing system is also designed to validate the effectiveness of this method.The system,which features a multilayer composite structure,responds to changes in touch pressure in real time.Experiments are conducted to discretely and continuously measure touch pressure and track touch points.Experimental results indicate that,compared with traditional single-frame static imaging methods,the proposed multiframe reconstruction algorithm notably reduces the positional error,deformation,and artifacts in the reconstructed images during motion,achieving a higher degree of conformity with the actual touch positions.This approach offers a promising solution for touch sensing in the field of human–machine interaction.

关 键 词：电阻抗成像 触觉传感 触摸跟踪 多帧 图像重建 动态成像 轨迹书写 人机交互 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]