发明名称 |
MOTION FIELD GENERATION FOR NON-RIGID IMAGE REGISTRATION |
摘要 |
A method and system is presented for generating a full motion field of an object, when performing non-rigid image registration between a first and a second image of the object. A mesh grid generator (310) generates in the first image a mesh grid having a plurality of mesh nodes, for each of a hierarchy of mesh resolution levels. A nodal motion estimator (320) estimates, for each me node, at least one nodal motion vector that describes a matching of the mesh node with a corresponding mesh node in the second image. At each mesh node, multi-level block matching is performed, using a similarity measure based on pattern intensity. A smoothness constraint is imposed, in order to reconstruct the nodal motion vector for those mesh nodes at which mismatching occurs. A motion field interpolator determines a local motion vector for any desired point of interest within the first image, by interpolating from the nodal motion vectors of the surronding mesh nodes. |
申请公布号 |
WO2006011924(A3) |
申请公布日期 |
2006.12.07 |
申请号 |
WO2005US08617 |
申请日期 |
2005.03.14 |
申请人 |
ACCURAY, INC.;FU, DONGSHAN;KUDUVALLI, GOPINATH |
发明人 |
FU, DONGSHAN;KUDUVALLI, GOPINATH |
分类号 |
G06K9/00;G06K9/36;G06K9/38 |
主分类号 |
G06K9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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