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README.md
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pretty_name: MultiCaptions
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pretty_name: MultiCaptions
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size_categories:
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- 100K<n<1M
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---
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# **OpenCOCO-I2T-Repack-Tiny**
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> **OpenCOCO-I2T-Repack-Tiny** is a compact **image-to-text / image-text-to-text captioning dataset** containing **158,958 image samples** sourced from the **COCO dataset** and repackaged into a lightweight format suitable for vision-language model (VLM) fine-tuning. The dataset contains synthesized responses generated using a **custom Qwen3.5 multimodal captioning pipeline**. The input images undergo **lossless image compression** to significantly reduce the overall storage footprint while preserving the visual information required for training and inference. With approximately **159K samples compressed into only 3.84 GB**, OpenCOCO-I2T-Repack-Tiny is designed to provide an easily accessible and efficient dataset for VLM-based fine-tuning, experimentation, and image understanding tasks.
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## Dataset Overview
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| Property | Details |
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| ------------------ | ------------------------------------- |
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| Dataset Name | **OpenCOCO-I2T-Repack-Tiny** |
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| Samples | **158,958** |
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| Task | Image-to-Text / Image-Text-to-Text |
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| Modality | Image + Text |
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| Image Source | COCO |
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| Caption Generation | Qwen3.5 Custom Multimodal Pipeline |
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| Format | Parquet |
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| Dataset Size | **3.84 GB** |
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| License | Apache-2.0 |
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| Primary Use | VLM Fine-Tuning / Image Understanding |
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## Description
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OpenCOCO-I2T-Repack-Tiny is a repackaged version of COCO-based image data designed specifically for efficient multimodal training workflows.
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The dataset consists of:
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* **158,958 image-text samples**
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* Images sourced from the publicly available **COCO dataset**
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* Rich textual responses generated through a custom **Qwen3.5 multimodal pipeline**
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* Losslessly compressed input images
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* A compact Parquet-based dataset structure
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* Image source metadata preserved alongside the generated responses
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The goal is to provide a relatively small storage footprint while retaining a large number of image-text training examples.
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## Dataset Construction
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The dataset construction pipeline consists of several stages:
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1. **Image Collection**
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* Images are sourced from the COCO dataset.
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* The original image source is retained through the `image_source` field.
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2. **Multimodal Caption Generation**
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* Images are processed through a custom Qwen3.5-based multimodal pipeline.
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* The pipeline generates descriptive textual responses based on the visual content of each image.
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3. **Image Compression**
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* Input images undergo lossless image compression.
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* The objective is to reduce storage requirements without introducing lossy visual degradation.
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4. **Dataset Repacking**
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* Images and generated responses are consolidated into a compact dataset structure.
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* The final dataset is packaged in Parquet format for efficient loading and processing.
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5. **VLM Training Preparation**
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* The resulting image-text pairs can be directly adapted for multimodal fine-tuning workflows.
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## Dataset Structure
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The dataset contains the following primary fields:
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```text
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image
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image_source
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response
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```
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### `image`
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The compressed input image used for multimodal captioning and analysis.
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### `image_source`
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The source associated with the original image.
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For COCO samples, the source is:
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[COCO Dataset](https://cocodataset.org/?utm_source=chatgpt.com)
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### `response`
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The synthesized textual response generated by the custom Qwen3.5 multimodal pipeline.
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The responses are intended to provide rich visual descriptions suitable for image understanding and VLM training.
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## Example
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```text
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image:
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[COCO image]
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image_source:
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http://cocodataset.org/
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response:
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This outdoor wooden table scene features a hearty breakfast setup, bathed in bright sunlight. In the foreground, multiple plates and food items are arranged across the table...
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```
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## Dataset Statistics
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* **Total Samples:** 158,958
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* **Approximate Dataset Size:** 3.84 GB
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* **Source:** COCO
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* **Task:** Image-to-Text / Image-Text-to-Text
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* **Image Compression:** Lossless
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* **Caption Generation:** Qwen3.5 Custom Multimodal Pipeline
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The compact storage footprint makes the dataset convenient for local experimentation, cloud training, and VLM fine-tuning environments with limited storage capacity.
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## Intended Use
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OpenCOCO-I2T-Repack-Tiny can be used for:
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* Vision-Language Model fine-tuning
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* Image captioning
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* Image understanding
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* Visual instruction tuning
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* Multimodal representation learning
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* Image-to-text generation
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* Image-text alignment
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* VLM benchmarking and experimentation
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* Lightweight multimodal training pipelines
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## Why OpenCOCO-I2T-Repack-Tiny?
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The primary goal of this repack is **efficiency**.
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Rather than maintaining a large raw image collection, the dataset combines a high sample count with aggressive **lossless compression** and an efficient Parquet-based representation.
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This results in:
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> **158,958 image-text samples in approximately 3.84 GB.**
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This makes the dataset particularly useful for researchers and developers who want a large number of multimodal examples without requiring an excessively large amount of local or cloud storage.
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## Data Source
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The underlying images are sourced from the **COCO dataset**.
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[COCO Dataset](https://cocodataset.org/)
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This dataset is a repackaged and processed resource containing generated textual responses and compressed image representations.
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Users should review the original source dataset's terms and attribution requirements when using the data.
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## Citation
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If you use **OpenCOCO-I2T-Repack-Tiny** in your research or project, please cite:
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```bibtex
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@misc{prithiv_sakthi_2026,
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author = {Prithiv Sakthi},
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title = {OpenCOCO-I2T-Repack-Tiny (Revision a7ae40c)},
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year = {2026},
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url = {https://huggingface.co/datasets/prithivMLmods/OpenCOCO-I2T-Repack-Tiny},
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doi = {10.57967/hf/10057},
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publisher = {Hugging Face}
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}
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```
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Dataset page:
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[OpenCOCO-I2T-Repack-Tiny on Hugging Face](https://huggingface.co/datasets/prithivMLmods/OpenCOCO-I2T-Repack-Tiny)
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Dataset creator:
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[prithivMLmods on Hugging Face](https://huggingface.co/prithivMLmods)
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## License
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This dataset is released under the **Apache-2.0** license as indicated by the dataset repository.
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Because the underlying imagery originates from COCO, users should also review the applicable terms, attribution requirements, and usage conditions associated with the original source material.
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