Discrete image generators learn the distribution of tokens produced by an image tokenizer. These token representations should be easy for generators to model, not merely enable faithful image reconstr...
The paper introduces MTAR, a training framework for autoregressive image generation that enhances performance through multi-token prediction, token-level contrastive regularization, and semantic dropping. These components address sparse supervision, improve representation discriminability, and accelerate training without affecting inference. On ImageNet, MTAR outperforms LlamaGen with lower FID and faster training, achieving comparable results in only a third of the iterations.
By Guo Niu, Xiongfei Yao, Teng Wang, Nannan Zhu
The paper proposes a self‑supervised representation learning method that serves as a tokenizer for generative models. It supervises a representation loss by factorizing pointwise mutual information, estimated through differences between conditional predictions of a learned generative model. The authors demonstrate that this approach avoids dimensional collapse and feature suppression seen in methods like DINO and LeJEPA, scales predictably with compute, and achieves compute‑optimal performance over direct diffusion for pixel‑space generation, with strong scaling laws on ImageNet and GPIC.
By Alan Baade, Kyle Sargent, Vincent Sitzmann, Eric Ryan Chan, Justin Johnson, Li Fei-Fei, Gordon Wetzstein
QuadTok introduces a quadtree-based visual tokenizer that replaces traditional 2D grids or 1D token sequences with a hierarchical structure, allowing dynamic allocation of tokens to visually complex regions while using coarser resolution for homogeneous areas. The tokenizer, trained on ImageNet, reduces token usage by about 10% compared to a fixed 256-token grid and retains comparable reconstruction fidelity. Leveraging the tree’s natural causality, a 947 M GPT-style model conditioned on a quadtree topology achieves a 2.08 gFID on ImageNet 256×256 and supports zero‑shot spatially controlled image generation.
By Yucheng Mao, Zeyuan Chen, Xiaojun Shan, Xiang Zhang, Divyansh Srivastava, Bingnan Li, Zhuowen Tu
arXiv:2606. 05552v1 Announce Type: new Abstract: Despite progress in image tokenization, standard methods encode redundant information by mixing all granularities within each token, thus redundancy persists between tokens.
By Haozhe Chi, Jinghan Li, Hao Jiang, Wu Sheng, Yi Ma, Jing Wang, Yadong Mu
arXiv:2610.09242v1 Announce Type: new
Abstract: Representation Autoencoders (RAEs) generate images from pre-trained visual fea- tures, but their dense token grids make generative modeling expensive....
By Ram\'on Calvo-Gonz\'alez, Youssef Saied, Fran\c{c}ois Fleuret