ArtChart: A Benchmark for Faithful Artistic Chart Generation with Integrated Text Rendering

TL;DR - ArtChart is a framework and benchmark for generating stylized charts while preserving numerical geometry, exact text, label-mark alignment, and readability. It matters because current image models often sacrifice mathematical integrity for visual appeal.

• Uses text-free grayscale layouts to condition generation and preserve chart structure.
• Applies reinforcement learning with OCR, layout-quality, and aesthetic rewards.
• Uses multi-expert distillation to mitigate conflicts among optimization rewards.
• Introduces a bilingual 2K-prompt benchmark and six-axis evaluation suite spanning four chart types.