Datasets:
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pretty_name: M³Diff Instruction-Tuning Data
language:
- en
license: other
task_categories:
- image-to-text
tags:
- image
- text
- image-difference-captioning
- multimodal
- multi-image
- visual-instruction-tuning
- m3diff
size_categories:
- 100K<n<1M
configs:
- config_name: default
data_files:
- split: train
path: training_m3diff.json
---
# M³Diff Instruction-Tuning Data
This repository contains the instruction-tuning annotations used to train
**M³Diff**, the model introduced in [OmniDiff: A Comprehensive Benchmark for
Fine-grained Image Difference Captioning](https://openaccess.thecvf.com/content/ICCV2025/html/Liu_OmniDiff_A_Comprehensive_Benchmark_for_Fine-grained_Image_Difference_Captioning_ICCV_2025_paper.html)
(ICCV 2025).
The dataset contains **896,015 question-answer records** for fine-grained
Image Difference Captioning (IDC). Each record presents two related images and
asks the model to describe the visual changes between them. This repository
contains the JSON annotations and relative image paths only; **the image files
are not included**.
Hugging Face dataset ID: `IVC-liuyuan/training_m3diff`.
## Dataset composition
The training mixture combines OmniDiff with several established IDC datasets
covering real-world, edited, surveillance, bird, and 3D-rendered scenes.
| Source | Instruction records |
| --- | ---: |
| CLEVR-Change | 444,156 |
| CLEVR-DC | 384,466 |
| OmniDiff | 28,056 |
| spot-the-diff | 20,862 |
| birds-to-words | 14,265 |
| IEdit | 4,210 |
| **Total** | **896,015** |
The counts above refer to instruction records, not necessarily unique image
pairs.
OmniDiff itself is a fine-grained IDC benchmark with 15,598 human-captioned
image pairs collected from 324 diverse indoor and outdoor scenarios. It
contains real-world and 3D-rendered scenes, covers 12 visual change types, and
has captions averaging 60 words. The change taxonomy includes viewpoint,
illumination, addition, disappearance, removal, substitution, size, color,
orientation, pose, OCR, and counting.
## Data format
`training_m3diff.json` is one JSON array. Every record has the following
structure:
```json
{
"image_id": "005422.png",
"image": [
"CLEVR-Change/nsc_images/CLEVR_nonsemantic_005422.png",
"CLEVR-Change/sc_images/CLEVR_semantic_005422.png"
],
"conversations": [
{
"from": "human",
"value": "What modifications can be observed between these two pictures? <image><image>Difference:"
},
{
"from": "gpt",
"value": "the small yellow cylinder changed to brown."
}
]
}
```
Fields:
- `image_id` or `id`: source-specific sample identifier. Older converted
records use `image_id`, while some records use `id`.
- `image`: two paths relative to the common image root, ordered as the first
and second images being compared.
- `conversations`: a two-turn LLaVA-style conversation. The human turn contains
two `<image>` placeholders and the GPT turn contains the target difference
caption.
All 896,015 records contain exactly two image paths and one human/GPT
conversation pair. The data uses 30 paraphrased prompt templates to reduce
dependence on a single question formulation.
## Loading
Load the annotations directly from the Hub:
```python
from datasets import load_dataset
dataset = load_dataset("IVC-liuyuan/training_m3diff", split="train")
print(dataset[0])
```
Alternatively, download the raw JSON:
```python
from huggingface_hub import hf_hub_download
annotation_path = hf_hub_download(
repo_id="IVC-liuyuan/training_m3diff",
repo_type="dataset",
filename="training_m3diff.json",
)
```
To train M³Diff, arrange the separately obtained images under a common root
so the paths in each record resolve as follows:
```text
<IMAGE_ROOT>/
├── OmniDiff/
├── CLEVR-Change/
├── CLEVR-DC/
├── IEdit/
├── spot-the-diff/
└── birds-to-words/
```
## Intended use
This dataset is intended for research on image difference captioning,
fine-grained paired-image understanding, and multimodal instruction tuning. It
was assembled for training M³Diff, which augments LLaVA-OneVision-7B with a
Multi-scale Differential Perception (MDP) module.
## License
The repository aggregates annotation records derived from multiple datasets,
so no single license is asserted for the complete mixture. The annotations,
image paths, and separately downloaded images remain subject to the terms of
OmniDiff and their respective upstream datasets: Spot-the-Diff, IEdit,
Birds-to-Words, CLEVR-Change, and CLEVR-DC. Consult each source before use or
redistribution. Uploading this JSON file does not relicense any image.
## Citation
If this training set or M³Diff is useful in your research, please cite:
```bibtex
@inproceedings{liu2025omnidiff,
title={OmniDiff: A Comprehensive Benchmark for Fine-grained Image Difference Captioning},
author={Liu, Yuan and Hou, Saihui and Hou, Saijie and Du, Jiabao and Meng, Shibei and Huang, Yongzhen},
booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision},
pages={21440--21449},
year={2025}
}
```
## Acknowledgements
M³Diff builds on OmniDiff, LLaVA-OneVision, Qwen2, and SigLIP. We also
acknowledge the creators of Spot-the-Diff, IEdit, Birds-to-Words,
CLEVR-Change, and CLEVR-DC. Please cite the corresponding upstream works when
using their portions of this training mixture.
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