Weichuan Yu, Tianzhu Liang and Xiaowei Zhou.
“Image based tracking.”
US Patent filed on June 7, 2012 (application number 14/125,067).

中国专利申请号:201080017129.3. 申请日期:2012.03.28.

余维川, 梁天柱, 周晓巍.
中国专利申请号:201280028147.0 申请日期: 2012.06.07.

Weichuan Yu and Tianzhu Liang.
“An affine warping method to solve the feature-motion decorrelation problem in ultrasound image based tracking”
US Provisional Patent filed in June, 2011.