Adaptive Pooling of the Most Relevant Spatio-Temporal Features for Action Recognition
Bibliographic record
Abstract
This paper presents a model-based action recognition system that utilizes the Kinect 3D skeleton to construct adaptive spatio-temporal motion representations. The proposed method utilizes two features, namely the joint relative distance (JRD) and joint relative angle (JRA) to encode the spatio-temporal motion patterns of different skeletal joints. To evaluate the relevance of a particular joint-pair in representing an action class, we introduce a flatness measure that quantifies the level of engagement of the corresponding joint-pair in performing the action. The flatness measures computed for all skeletal joint-pairs are accumulated to construct a joint-pair relevance (JPR) matrix, which facilitates adaptive pooling of the most relevant spatio-temporal features to construct the final motion description for individual action classes. In addition, we propose a score level fusion of JRD and JRA features with a weighted dynamic time warping (DTW)-based matching scheme to effectively boost the overall recognition performance. In our experiments, the proposed method achieves better recognition performance than well-known existing methods.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".