发明申请
US20090238404A1 METHODS FOR USING DEFORMABLE MODELS FOR TRACKING STRUCTURES IN VOLUMETRIC DATA
审中-公开
用于在体积数据中跟踪结构的可变模型的方法
- 专利标题: METHODS FOR USING DEFORMABLE MODELS FOR TRACKING STRUCTURES IN VOLUMETRIC DATA
- 专利标题(中): 用于在体积数据中跟踪结构的可变模型的方法
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申请号: US12050715申请日: 2008-03-18
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公开(公告)号: US20090238404A1公开(公告)日: 2009-09-24
- 发明人: Fredrik Orderud , Stein Inge Rabben , Joger Hansegard
- 申请人: Fredrik Orderud , Stein Inge Rabben , Joger Hansegard
- 主分类号: G06T7/20
- IPC分类号: G06T7/20
摘要:
A computerized method for tracking of a 3D structure in a 3D image including a plurality of sequential image frames, one of which is a current image frame, includes representing the 3D structure being tracked with a parametric model with parameters for local shape deformations. A predicted state vector is created for the parametric model using a kinematic model. The parametric model is deformed using the predicted state vector, and a plurality of actual points for the 3D structure is determined using a current frame of the 3D image, and displacement values and a measurement vectors are determined using differences between the plurality of actual points and the plurality of predicted points. The displacement values and the measurement vectors are filtered to generate an updated state vector and an updated covariance matrix, and an updated parametric model is generated for the current image frame using the updated state vector.
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