Blend shapes - Summary
- Standard for facial/complex shapes deformation
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- (+) Allow to add/substract local expressions from pre-set poses
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- (+) Allow expression transfert
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- Keep same \(D\) for difference faces \(b^0\)
- Requires same connectivity
- Requires non redundant/interfering poses
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- \(D\) is not an othogonal matrix
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- Different weights can give the same result
- PCA can orthogonalize the matrix
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- but weights are less intuitive (not positive)
