README.md

---
language:
- en
license: apache-2.0
size_categories:
- 1M<n<10M
pretty_name: MMEB-train-lance
tags:
- embedding
- lance
- multimodal
configs:
- config_name: A-OKVQA
  data_files:
  - split: train
    path: data/A-OKVQA/train.lance/**
  - split: original
    path: data/A-OKVQA/original.lance/**
  - split: diverse_instruction
    path: data/A-OKVQA/diverse.lance/**
- config_name: ChartQA
  data_files:
  - split: train
    path: data/ChartQA/train.lance/**
  - split: original
    path: data/ChartQA/original.lance/**
  - split: diverse_instruction
    path: data/ChartQA/diverse.lance/**
- config_name: CIRR
  data_files:
  - split: train
    path: data/CIRR/train.lance/**
  - split: original
    path: data/CIRR/original.lance/**
  - split: diverse_instruction
    path: data/CIRR/diverse.lance/**
- config_name: DocVQA
  data_files:
  - split: train
    path: data/DocVQA/train.lance/**
  - split: original
    path: data/DocVQA/original.lance/**
  - split: diverse_instruction
    path: data/DocVQA/diverse.lance/**
- config_name: HatefulMemes
  data_files:
  - split: train
    path: data/HatefulMemes/train.lance/**
  - split: original
    path: data/HatefulMemes/original.lance/**
  - split: diverse_instruction
    path: data/HatefulMemes/diverse.lance/**
- config_name: ImageNet_1K
  data_files:
  - split: train
    path: data/ImageNet_1K/train.lance/**
  - split: original
    path: data/ImageNet_1K/original.lance/**
  - split: diverse_instruction
    path: data/ImageNet_1K/diverse.lance/**
- config_name: InfographicsVQA
  data_files:
  - split: train
    path: data/InfographicsVQA/train.lance/**
  - split: original
    path: data/InfographicsVQA/original.lance/**
  - split: diverse_instruction
    path: data/InfographicsVQA/diverse.lance/**
- config_name: MSCOCO
  data_files:
  - split: train
    path: data/MSCOCO/train.lance/**
  - split: original
    path: data/MSCOCO/original.lance/**
  - split: diverse_instruction
    path: data/MSCOCO/diverse.lance/**
- config_name: MSCOCO_i2t
  data_files:
  - split: train
    path: data/MSCOCO_i2t/train.lance/**
  - split: original
    path: data/MSCOCO_i2t/original.lance/**
  - split: diverse_instruction
    path: data/MSCOCO_i2t/diverse.lance/**
- config_name: MSCOCO_t2i
  data_files:
  - split: train
    path: data/MSCOCO_t2i/train.lance/**
  - split: original
    path: data/MSCOCO_t2i/original.lance/**
  - split: diverse_instruction
    path: data/MSCOCO_t2i/diverse.lance/**
- config_name: N24News
  data_files:
  - split: train
    path: data/N24News/train.lance/**
  - split: original
    path: data/N24News/original.lance/**
  - split: diverse_instruction
    path: data/N24News/diverse.lance/**
- config_name: NIGHTS
  data_files:
  - split: train
    path: data/NIGHTS/train.lance/**
  - split: original
    path: data/NIGHTS/original.lance/**
  - split: diverse_instruction
    path: data/NIGHTS/diverse.lance/**
- config_name: OK-VQA
  data_files:
  - split: train
    path: data/OK-VQA/train.lance/**
  - split: original
    path: data/OK-VQA/original.lance/**
  - split: diverse_instruction
    path: data/OK-VQA/diverse.lance/**
- config_name: SUN397
  data_files:
  - split: train
    path: data/SUN397/train.lance/**
  - split: original
    path: data/SUN397/original.lance/**
  - split: diverse_instruction
    path: data/SUN397/diverse.lance/**
- config_name: VOC2007
  data_files:
  - split: train
    path: data/VOC2007/train.lance/**
  - split: original
    path: data/VOC2007/original.lance/**
  - split: diverse_instruction
    path: data/VOC2007/diverse.lance/**
- config_name: VisDial
  data_files:
  - split: train
    path: data/VisDial/train.lance/**
  - split: original
    path: data/VisDial/original.lance/**
  - split: diverse_instruction
    path: data/VisDial/diverse.lance/**
- config_name: Visual7W
  data_files:
  - split: train
    path: data/Visual7W/train.lance/**
  - split: original
    path: data/Visual7W/original.lance/**
  - split: diverse_instruction
    path: data/Visual7W/diverse.lance/**
- config_name: VisualNews_i2t
  data_files:
  - split: train
    path: data/VisualNews_i2t/train.lance/**
  - split: original
    path: data/VisualNews_i2t/original.lance/**
  - split: diverse_instruction
    path: data/VisualNews_i2t/diverse.lance/**
- config_name: VisualNews_t2i
  data_files:
  - split: train
    path: data/VisualNews_t2i/train.lance/**
  - split: original
    path: data/VisualNews_t2i/original.lance/**
  - split: diverse_instruction
    path: data/VisualNews_t2i/diverse.lance/**
- config_name: WebQA
  data_files:
  - split: train
    path: data/WebQA/train.lance/**
  - split: original
    path: data/WebQA/original.lance/**
  - split: diverse_instruction
    path: data/WebQA/diverse.lance/**
- config_name: images
  data_files: data/images/**
---

# MMEB Training Dataset (Lance Format)

This is a **Lance-format** version of the [TIGER-Lab/MMEB-train](https://huggingface.co/datasets/TIGER-Lab/MMEB-train) dataset, optimized for efficient storage and fast random access.

The original dataset is used for training VLM2Vec models in the paper [VLM2Vec: Training Vision-Language Models for Massive Multimodal Embedding Tasks](https://arxiv.org/abs/2410.05160) (ICLR 2025).

## Directory Structure

```
TIGER-Lab_MMEB-train/
└── data/
    ├── A-OKVQA/
    │   ├── train.lance
    │   ├── original.lance
    │   └── diverse.lance
    ├── MSCOCO/
    │   └── ...
    └── images/
        ├── A-OKVQA.lance
        ├── MSCOCO.lance
        └── ...
```

## Schema

### Metadata (`{dataset}/{variant}.lance`)

| Field | Type | Description |
|-------|------|-------------|
| `qry` | string | Query text (may contain `<\|image_1\|>` placeholder) |
| `qry_image_id` | string | Query image path (empty if text-only) |
| `pos_text` | string | Positive sample text |
| `pos_image_id` | string | Positive sample image path |
| `neg_text` | string | Negative sample text (optional) |
| `neg_image_id` | string | Negative sample image path (optional) |

### Images (`images/{dataset}.lance`)

| Field | Type | Description |
|-------|------|-------------|
| `image_id` | string | Image path identifier |
| `data` | binary | Image binary data (JPEG) |

## Dataset Statistics

| Dataset | Samples | Images |
|---------|---------|--------|
| A-OKVQA | 17,056 | 17,056 |
| ChartQA | 28,299 | 28,299 |
| CIRR | 26,116 | 16,640 |
| DocVQA | 39,463 | 39,463 |
| HatefulMemes | 8,500 | 8,500 |
| ImageNet_1K | 100,000 | 100,000 |
| InfographicsVQA | 23,946 | 4,406 |
| MSCOCO | 100,000 | 59,969 |
| MSCOCO_i2t | 113,287 | 113,287 |
| MSCOCO_t2i | 100,000 | 70,414 |
| N24News | 48,988 | 48,988 |
| NIGHTS | 15,941 | 31,882 |
| OK-VQA | 9,009 | 9,009 |
| SUN397 | 19,850 | 19,850 |
| VisDial | 123,287 | 123,287 |
| Visual7W | 69,817 | 14,366 |
| VisualNews_i2t | 100,000 | 100,000 |
| VisualNews_t2i | 99,903 | 99,903 |
| VOC2007 | 7,844 | 7,844 |
| WebQA | 17,166 | 12,873 |

Each dataset has 3 variants: `train`, `original`, and `diverse_instruction` (same sample count, different instruction templates).

## Original Dataset

This dataset is derived from [TIGER-Lab/MMEB-train](https://huggingface.co/datasets/TIGER-Lab/MMEB-train). For evaluation, please refer to [TIGER-Lab/MMEB-eval](https://huggingface.co/datasets/TIGER-Lab/MMEB-eval).

## Citation

```bibtex
@article{jiang2024vlm2vec,
  title={VLM2Vec: Training Vision-Language Models for Massive Multimodal Embedding Tasks},
  author={Jiang, Ziyan and Meng, Rui and Yang, Xinyi and Yavuz, Semih and Zhou, Yingbo and Chen, Wenhu},
  journal={arXiv preprint arXiv:2410.05160},
  year={2024}
}
```

## License

Apache-2.0 (same as the original dataset)