arXiv AI By Huawei Lin, Tony Geng, Zhaozhuo Xu, Weijie Zhao

VTBench: Evaluating Visual Tokenizers for Autoregressive Image Generation

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VTBench is a new benchmark that evaluates visual tokenizers (VTs) used in autoregressive image generation. It assesses VTs on image reconstruction, detail preservation, and text preservation across diverse scenarios, revealing that continuous VAEs outperform discrete VTs in maintaining spatial structure and semantic detail. The study also explores GPT‑4o’s potential autoregressive behavior and releases the benchmark publicly to encourage development of robust, open‑source VTs.

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