SKFlow: Optical Flow Estimation Using Selective Kernel Networks
Bibliographic record
Abstract
Leveraging on the recent developments in convolutional neural networks (CNNs), optical flow estimation from adjacent frames has been cast as a learning problem, with performance exceeding traditional approaches. The existing networks always use standard convolutional layers for extracting multi-level features with the fixed kernel size at each level. For enlarging the receptive field, some works introduce dilated convolution operation, which can capture more contextual information and can avoid the loss of motion details. However, these networks lack the ability to adaptively adjust its receptive field size and cannot aggregate multi-scale information with a selective mechanism. To address this problem, in this paper, we introduce selective kernel network into optical flow estimation, which can adaptively select different scale features and adjust their receptive field according to the global information. Specifically, we conduct the selective kernel mechanism on each level of pyramid, which can adaptively select multi-scale feature at each pyramidal level. The extensive analyses are conducted on MPI-Sintel and KITTI datasets to verify the effectiveness of the proposed approach. The experimental results show that our model achieves comparable results with the previous state-of-the-art networks while keeping a small model size.
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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 | 0.002 |
| Open science | 0.001 | 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".