Explicit Spatial Hint and Implicit Logits Relation: Distilling Heterogeneous Knowledge From Vision Transformer to CNN
Bibliographic record
Abstract
A lightweight Convolutional Neural Network (CNN) typically requires knowledge transfer from a large powerful network before it is employed in resource-limited edge devices. Vision Transformer (ViT) possesses an unparalleled capability for global modeling but remains largely unexplored in Knowledge Distillation (KD). The main reason is that the gap in receptive fields between ViT and CNN causes representation discrepancy and logits confidence-bias. In this paper, we propose a novel heterogeneous distillation method based on explicit spatial hint and implicit logits relation for transferring knowledge from ViT to CNN. By exploiting class discriminative regions of an input image, class attention transfer is developed to adaptively identify common regions of interest as a spatial hint, bridging the representation gap between the heterogeneous architectures. Meanwhile, a learnable projector equipped with our soft maximum function is introduced to refine the logits relation to evaluate all classification results more evenly with smoother gradient flows, which helps CNN to effectively learn with larger capacity gaps. Extensive experiments demonstrate that our proposed method can achieves state-of-the-art performance on multiple benchmark datasets, which is simple yet efficient without relying on any auxiliary network of homogeneous architectures.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".