Activity recognition using the velocity histories of tracked keypoints.
Ross MessingChristopher J. PalHenry A. KautzPublished in: ICCV (2009)
Keyphrases
- keypoints
- image matching
- scale invariant
- multiscale
- keypoint detection
- feature detection
- object recognition
- image features
- scale space
- sift features
- global features
- visual words
- scale invariant feature transform
- optical flow
- image sequences
- affine transformation
- human activities
- invariant features
- sift descriptors
- three dimensional