arXiv AI By Aditya Gupta, Jean Sebastien Dandurand, Kai Qiu, Rohan Choudhury, Laszlo A. Jeni

Learning Hierarchical Patch Splitting Policies for Faster Vision Transformers

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The paper introduces Split Policy Learned Image Tokenization (SPLIT), a method that learns to allocate token resolution based on the model’s interpretation of task-relevant information rather than raw pixel statistics. SPLIT produces shorter token sequences while matching the accuracy of full-resolution Vision Transformers on classification tasks, and it also achieves competitive performance on dense prediction benchmarks such as COCO and ADE20K.

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arXiv AI
Oct 15

Scaling Vision Transformers Without Training: Prune-and-Merge Token Compression

The paper introduces Prune-and-Merge ViT, a training‑free token compression framework for Vision Transformers that combines class‑attention pruning with similarity‑based merging to reduce computational cost while preserving semantic information. It evaluates robustness using two new metrics—Relative Accuracy Drop (RAD) and Prediction Flip Rate (PFR)—and shows that the method maintains or improves accuracy on pretrained ViT and DeiT models compared to existing token reduction techniques. The authors also argue that the hybrid approach does not induce hallucination‑like behavior and keeps predictions stable under common image transformations.

By Vatsal, Soumil Malhotra, Priyanshu Chahal, Sanjeev Kumar
arXiv Computer Vision
Oct 28

DART: Differentiable Dynamic Adaptive Region Tokenizer for Vision Foundation Models

DART is a fully differentiable Dynamic Adaptive Region Tokenizer that replaces fixed‑grid tokenizers in vision models. It uses learnable region scores and quantile‑based partitioning to create content‑aware patches of varying sizes, allocating more tokens to information‑rich areas. In experiments, a DART‑equipped DeiT‑Small matches the performance of a larger DeiT‑Base while nearly doubling inference speed, and the approach also benefits dense prediction and video tasks.

By Shicheng Yin, Kaixuan Yin, Yang Liu, Weixing Chen, Liang Lin