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DenseWorld-1M: Towards Detailed Dense Grounded Caption in the Real World

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arxiv 2506.24102 v1 pith:OHPME3WU submitted 2025-06-30 cs.CV

classification cs.CV
keywords captiondetaileddensestagecaptionsdatasetsdenseworld-1mfirst
verification ladder T0 review T1 audit T2 compute T3 formal
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Multimodal Large Language Models (MLLMs) demonstrate a complex understanding of scenes, benefiting from large-scale and high-quality datasets. Most existing caption datasets lack the ground locations and relations for visual entities. Several grounded caption datasets face the problems of missing detailed descriptions, relations, and massive object descriptions on high-resolution images. To fill this gap for the community, we present DenseWorld-1M, the first massive, detailed, dense grounded caption dataset in the real world. We design a three-stage labeling pipeline, containing open-world perception, detailed object caption generation, and dense caption merging. The first stage obtains entity-level masks and labels. The second stage generates the object-level, detailed captions with the guidance of masks and labels from the first stage. The final stage merges object captions and masks into spatial and relational dense captions. To accelerate the labeling process and improve caption quality, we present two VLM models: the Detailed Region Caption model and the Spatial Caption Merging model. Extensive experiments on various settings, including vision-language understanding, visual grounding, and region caption generation, demonstrate the effectiveness of our DenseWorld-1M dataset and labeling models.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Actor as Its Own Critic: Unifying Region Understanding and Localization via CycleGRPO

    cs.CV 2026-07 accept novelty 7.0 of 10

    A single MLLM jointly improves region captioning and localization by rewarding captions that let it reconstruct the original mask, needing only region inputs.

  2. MotionAtlas: Detailed Region Captioning for Motion-Centric Videos

    cs.CV 2026-06 unverdicted novelty 6.0 of 10

    MotionAtlas supplies a 2,073-question benchmark, a self-bootstrap pipeline yielding 159k captions, and fine-tuned Video-MLLMs that deliver 5.2-point gains over Qwen3-VL-4B on motion tasks.

  3. PerceptionDLM: Parallel Region Perception with Multimodal Diffusion Language Models

    cs.CV 2026-06 unverdicted novelty 6.0 of 10

    PerceptionDLM enables parallel region captioning in multimodal diffusion language models via prompting and attention masking, introduces ParaDLC-Bench, and claims first parallel region perception with DLMs.

  4. Let ViT Speak: Generative Language-Image Pre-training

    cs.CV 2026-05 unverdicted novelty 6.0 of 10

    GenLIP pretrains ViTs to generate language tokens from images via LM objective without contrastive batches or extra decoders, matching baselines on less data and improving on OCR after multi-resolution continued pretraining.

  5. Kwai Keye-VL 1.5 Technical Report

    cs.CV 2025-09 conditional novelty 6.0 of 10

    Keye-VL-1.5 combines similarity-based Slow-Fast video token allocation with progressive context extension and iterative RL, reporting leading video-understanding results among 8B-scale multimodal models.

  6. Let ViT Speak: Generative Language-Image Pre-training

    cs.CV 2026-05 unverdicted novelty 5.0 of 10

    GenLIP pretrains ViTs to generate language tokens from visual tokens via autoregressive language modeling, matching strong baselines on multimodal tasks with less data.

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