arXiv Machine Learning

Logit Refiner: Improving Visual Autoregressive Models via Intra-Scale Dependency Modeling

The paper introduces the Logit Refiner, a lightweight autoregressive module that restores intra‑scale dependencies in Visual Autoregressive Models (VAR) by sequentially sampling tokens conditioned on frozen backbone features. This refiner adds only about 10% more parameters and less than 5% of the base model’s training compute, and can be applied to any pretrained VAR checkpoint without retraining. Experiments on ImageNet 256×256 show that the refiner consistently improves generation quality across backbones ranging from 310 M to 2 B parameters, enabling a 1.1 B‑parameter model to outperform a model twice its size, and the method generalizes to text‑to‑image generation, demonstrating that the mean‑field bottleneck is effectively alleviated.

arXiv Computer Vision
Aug 25

VISTA: Test-Time Compositional Alignment for Visual Autoregressive Generation

VISTA is a gradient‑based test‑time alignment framework designed for next‑scale visual autoregressive (VAR) image generation. It optimizes intermediate representations within the frozen transformer to enforce compositional constraints, without altering model weights or requiring extra training. Experiments on two benchmarks and two model scales show that VISTA improves compositional accuracy by up to 20% on a 2B backbone and 6% on an 8B backbone, while preserving image quality and enabling a smaller model to outperform a larger one.

By Hossein Shahabadi, Niki Sepasian, Mahdieh Soleymani Baghshah
arXiv Computer Vision
2d ago

SoL-Refiner: Speed-of-Light One-Step Refinement for High-Resolution Video

arXiv:2609.37969v1 Announce Type: new Abstract: High-resolution video generation is expensive, as its cost grows rapidly with the number of spatiotemporal tokens. A practical alternative first genera...

By Haozhe Liu, Tian Ye, Shuchen Xue, Yitong Li, Junsong Chen, Haopeng Li, Jincheng Yu, Duomin Wang, Ruihua Zhang, Lei Zhu, Song Han, Enze Xie
arXiv Computation and Language
Aug 31

PRISM: Self-Pruning Intrinsic Selection Method for Training-Free Multimodal Data Selection

PRISM is a training‑free framework that efficiently selects visual instruction data for multimodal large language models by addressing the anisotropy in visual feature distributions, which causes a Global Semantic Drift. By implicitly re‑centering visual semantics, PRISM removes the influence of global background features, cutting data‑selection and model‑tuning time to 30% of conventional pipelines while improving performance across eight multimodal and three language benchmarks, achieving a 101.7% relative gain over baseline models.

By Jinhe Bi, Aniri, Zengjie Jin, Yifan Wang, Danqi Yan, Wenke Huang, Xiaowen Ma, Sikuan Yan, Artur Hecker, Mang Ye, Xun Xiao, Hinrich Schuetze, Volker Tresp, Yunpu Ma
arXiv Computer Vision
Sep 17

FlashAR: Efficient Post-Training Acceleration for Autoregressive Image Generation

FlashAR is a lightweight post‑training adaptation framework that converts a pre‑trained raster‑scan autoregressive image model into a highly parallel generator using two‑way next‑token prediction. It preserves the original training objective by keeping the horizontal head for row‑wise prediction and adding a lightweight vertical head for column‑wise prediction, with a learnable fusion gate to combine the two predictions. A two‑stage adaptation pipeline—first initializing the vertical head from the pre‑trained model and then jointly fine‑tuning—yields up to a 22.9× speedup for 512×512 image generation while using only 0.05% of the original training data.

By Junkang Zhou, Yefei He, Feng Chen, Weijie Wang, Bohan Zhuang
arXiv Computer Vision
Sep 7

FAVE: Foveated Adaptive Visual Encoding for Efficient Fine-Grained Visual Understanding

FAVE (Foveated Adaptive Visual Encoding) is a lightweight, variable‑resolution Vision Transformer that encodes user‑selected image regions at high acuity while maintaining the image’s native geometry. In controlled experiments on small‑object ImageNet crops, FAVE outperforms a fixed‑resolution ViT by 9.4 top‑1 points while using 12.7× fewer FLOPs. When added as a local branch to FastVLM, FAVE improves TextVQA by 1.60 points and GQA attribute accuracy by 1.31 points, achieving a 3.3× speedup over SmolVLM2-2.2B with only 16 extra local tokens.

By Amitangshu Mukherjee, Kaushik Roy