Motion tracking
Suppose we have more than two images
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How to track a point through all of the images?
Feature Tracking
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Choose only the points (“features”) that are easily tracked
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How to find these features?
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In principle, we could estimate motion between each pair of
consecutive frames
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Given point in first frame, follow arrows to trace out it’s path
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Problem:
DRIFT
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small errors will tend to grow and grow over time—the point will
drift way off course
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windows where
has two large eigenvalues
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Called the Harris Corner Detector