Anthropometry-based skeleton fitting
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsVictor Ng-Thow-Hing, Jianbo Peng
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Abstract
An efficient technique to build subject-specific skeleton models from external measurements is provided. A generic human skeleton model is manipulated and deformed using marker positional data from human motion-captured sequences. The joint and bone geometry parameters are optimized to construct an estimate of the specific skeleton model of the human subject that originally performed the motion sequence. The scope of the fitting procedure can be adjusted to coincide with a series of smaller optimizations over local bone regions or expanded to a single global optimization over all skeleton geometry and joint parameters simultaneously.
Claims27
A method for producing a subject-specific skeleton from an external measurement data set and a generic skeleton, the generic skeleton comprising a plurality of parameters, the method comprising:
- determining a set of parameters, wherein the set includes a first parameter related to a size of a bone segment in a first dimension and a second parameter related to a size of the bone segment in a second dimension;
- applying, for the set of parameters, correspondence between the external measurement data set and the generic skeleton;
- and
- determining, for each parameter in the set, a value, by optimizing an objective function.
An apparatus for producing a subject-specific skeleton from an external measurement data set and a generic skeleton, the generic skeleton comprising a plurality of parameters, the apparatus comprising:
- a virtual marker placement module configured to determine a set of parameters, wherein the set includes a first parameter related to a size of a bone segment in a first dimension and a second parameter related to a size of the bone segment in a second dimension, and to apply, for the set of parameters, correspondence between the external measurement data set and the generic skeleton;
- and
- an optimization module for determining, for each parameter in the set, a value, by optimizing an objective function.
An apparatus for producing a subject-specific skeleton from an external measurement data set and a generic skeleton, the generic skeleton comprising a plurality of parameters, the apparatus comprising:
- means for determining a set of parameters, wherein the set includes a first parameter related to a size of a bone segment in a first dimension and a second parameter related to a size of the bone segment in a second dimension;
- means for applying, for the set of parameters, correspondence between the external measurement data set and the generic skeleton;
- and
- means for determining, for each parameter in the set, a value, by optimizing an objective function.
A non-transitory computer readable medium for producing a subject-specific skeleton from an external measurement data set and a generic skeleton, the generic skeleton comprising a plurality of parameters, the computer readable medium comprising:
- program instructions for determining a set of parameters, wherein the set includes a first parameter related to a size of a bone segment in a first dimension and a second parameter related to a size of the bone segment in a second dimension;
- program instructions for applying, for the set of parameters, correspondence between the external measurement data set and the generic skeleton;
- and
- program instructions for determining, for each parameter in the set, a value, by optimizing an objective function.
Dependencies are inferred from the claim text.