| Tracking features |
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| Feature tracking |
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| • | Find feature
correspondence between consecutive H, I |
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| • | Chain these
together to find long-range correspondences |
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| When will this go
wrong? |
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| • | Occlusions—feature
may disappear |
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| – | need mechanism
for deleting, adding new features |
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| • | Changes in shape,
orientation |
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| – | allow the feature
to deform |
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| • | Changes in color |
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