Bibliographic record
Abstract
We implement and quantitatively/qualitatively evaluate two optical flow methods that model occlusion. The Yuan et al. method [1] improves on the Horn and Schunck optical flow method at occlusion boundaries by using a dynamic coefficient (the Lagrange multiplier α) at each pixel that weighs the smoothness constraint relative to the optical flow constraint, by adopting a modified scheme to calculate average velocities and by using a “compensating” iterative algorithm to achieve higher computational efficiency. The Niu et al. method [2] is based on a modified version of the Lucas and Kanade optical flow method, that selects local intensity neighbourhoods, spatially and temporally, based on pixels that are on different sides of an occlusion boundary and then corrects any erroneous flow computed at occlusion boundaries. We present quantitative results for sinusoidal sequence with a known occlusion boundary. We also present qualitative evaluation of the methods on the Hamburg Taxi sequence and and the Trees sequence.
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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 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".