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 displacement 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 target, 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 system for muscles/balance function disability as an advanced and intuitional helping method.
Citation：
CHENZhaoxue, ZHAOHang, ZHENGJianli, ANMeijun, XUXiulin, CHENWenhuan. Research on Measuring the Velocity and Displacement of the Coxa and Knee Based on Video Image Processing. Journal of Biomedical Engineering, 2014, 31(6): 1223-1228. doi: 10.7507/1001-5515.20140232
Copy
Copyright © the editorial department of Journal of Biomedical Engineering of West China Medical Publisher. All rights reserved
| 1. |
王命延,朱明峰,王昊.机动车视频测速中关键技术的研究与实现[J].计算机工程,2006,32(5):198-201.
|
| 2. |
伏思华,张小虎.基于序列图像的运动目标实时检测方法[J].光学技术,2004,30(2):215-217,222.
|
| 3. |
王鲲鹏,张小虎,李立春,等.一种基于正负差图像的运动目标检测新方法[J].应用光学,2007,28(5):521-525.
|
| 4. |
韦宏强,冯进良,王劲松,等.序列图像中弱小运动目标检测方法[J].仪器仪表学报,2008,29(8):1735-1738.
|
| 5. |
ZHANG Z Y. Camera calibration with one-dimensional objects[C]//Proceedings of the 7th European Conference on Computer Vision-Part IV. Berlin, Heidelberg:Springer Berlin Heidelberg, 2002:161-174.
|
| 6. |
HAMMARSTEDT P, STURM P, HEYDEN A. Closed-form solutions and degenerate cases for camera calibration with one-dimensional objects[C]//Proceedings of the 10th International Conference on Computer Vision. Beijing, China:2005:317-324.
|
| 7. |
杨世梁,倪霞林.基于等边三角形的摄像机标定方法[J].计量与测试技术,2007,34(12):29-31.
|
| 8. |
张二虎,冯江.Blob分析中基于游程链的连通区域标记[J].应用科学学报,2008,26(5):536-540.
|
- 1. 王命延,朱明峰,王昊.机动车视频测速中关键技术的研究与实现[J].计算机工程,2006,32(5):198-201.
- 2. 伏思华,张小虎.基于序列图像的运动目标实时检测方法[J].光学技术,2004,30(2):215-217,222.
- 3. 王鲲鹏,张小虎,李立春,等.一种基于正负差图像的运动目标检测新方法[J].应用光学,2007,28(5):521-525.
- 4. 韦宏强,冯进良,王劲松,等.序列图像中弱小运动目标检测方法[J].仪器仪表学报,2008,29(8):1735-1738.
- 5. ZHANG Z Y. Camera calibration with one-dimensional objects[C]//Proceedings of the 7th European Conference on Computer Vision-Part IV. Berlin, Heidelberg:Springer Berlin Heidelberg, 2002:161-174.
- 6. HAMMARSTEDT P, STURM P, HEYDEN A. Closed-form solutions and degenerate cases for camera calibration with one-dimensional objects[C]//Proceedings of the 10th International Conference on Computer Vision. Beijing, China:2005:317-324.
- 7. 杨世梁,倪霞林.基于等边三角形的摄像机标定方法[J].计量与测试技术,2007,34(12):29-31.
- 8. 张二虎,冯江.Blob分析中基于游程链的连通区域标记[J].应用科学学报,2008,26(5):536-540.
