基于视频图像处理的髋、膝运动速度和位移的测定方法研究  

Research on Measuring the Velocity and Displacement of the Coxa and Knee Based on Video Image Processing

作　　者：陈兆学[1] 赵航[1] 郑建立[1] 安美君[2] 徐秀林[1] 陈文欢[1] 

机构地区：[1]上海理工大学医疗器械与食品学院,上海200093 [2]上海理工大学光电学院,上海200093

出　　处：《生物医学工程学杂志》2014年第6期1223-1228,共6页Journal of Biomedical Engineering

基　　金：上海市教委科研创新项目资助(11YZ116);上海理工大学校国家级项目与文科基地培育计划课题资助(12XGM04);上海市教委PACS系统重点课程项目资助;上海市科学技术委员会科研计划项目资助(084405)

摘　　要：在反复实验和不断研究改进的基础上,本文提出了一种高效的基于视频图像处理技术的髋、膝运动速度和位移的测定方案。以专门设计的24个均匀分布于两同心圆上的圆环点和两个可沿同心圆公共圆心随意在竖直平面内旋转的直杆作为基本测量辅助物,通过在康复训练床面一侧所安装的摄像头,基于简化的摄像机针孔投影模型和快速单帧视频感兴趣区域检测和分析技术,本方案可以对髋、膝的两维位移和速度进行实时、准确的定量测量。经过实验测试,本文所提出方案基本能够满足该类系统测量精度和处理速度的需求,完全可以作为一种先进、直观的辅助手段应用到肌肉/平衡功能障碍的智能化评定/训练治疗系统中。Based on repeated experiments as well as continuous researching and improving, an efficient scheme to measure velocity and displacement of the coxa and knee movements based on video image processing technique is presented in this paper. The scheme performed precise and real-time quantitative measurements of 2D velocity or dis- placement of the coxa and knee using a video camera mounted on one side of the healing and training beds. The beds were based on simplified pinhole projection model. In addition, we used a special-designed auxiliary calibration tar- get, composed by 24 circle points uniformly located on two concentric circles and two straight rods which can rotate freely along the concentric center within the vertical plane, to do the measurements. Experiments carried out in our laboratory showed that the proposed scheme could basically satisfy the requirements about precision and processing speed of such kind of system, and would be very suitable to be applied to smart evaluation/training and healing sys- tem for muscles/balance function disability as an advanced and intuitional helping method.

关 键 词：视频图像处理 髋、膝运动速度和位移测定 摄像机标定 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]