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Poster

MaskBit: Embedding-free Image Generation via Bit Tokens

Mark Weber · Lijun Yu · Qihang Yu · Xueqing Deng · Xiaohui Shen · Daniel Cremers · Liang-Chieh Chen

Hall 3 + Hall 2B #148
[ ] [ Project Page ]
Sat 26 Apr midnight PDT — 2:30 a.m. PDT

Abstract: Masked transformer models for class-conditional image generation have become a compelling alternative to diffusion models. Typically comprising two stages - an initial VQGAN model for transitioning between latent space and image space, and a subsequent Transformer model for image generation within latent space - these frameworks offer promising avenues for image synthesis. In this study, we present two primary contributions: Firstly, an empirical and systematic examination of VQGANs, leading to a modernized VQGAN. Secondly, a novel embedding-free generation network operating directly on bit tokens - a binary quantized representation of tokens with rich semantics. The first contribution furnishes a transparent, reproducible, and high-performing VQGAN model, enhancing accessibility and matching the performance of current state-of-the-art methods while revealing previously undisclosed details. The second contribution demonstrates that embedding-free image generation using bit tokens achieves a new state-of-the-art FID of 1.52 on the ImageNet 256×256 benchmark, with a compact generator model of mere 305M parameters. The code for this project is available on https://github.com/markweberdev/maskbit.

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