| --- |
| license: apache-2.0 |
| size_categories: |
| - 10K<n<100K |
| external_urls: |
| - https://github.com/zongjianwu/OpenRef-Benchmark |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: train.json |
| - split: val |
| path: val.json |
| task_categories: |
| - object-detection |
| - visual-question-answering |
| language: |
| - en |
| --- |
| |
|
|
| **A Benchmark** |
|
|
| OpenRef features three key advancements: 1) Diverse visual scenarios; 2) Variable target counts; 3) Rich vocabulary types |
|
|
| ## 📂 Dataset Schema & Field Definitions |
|
|
| To support open-world setting in generalized REC, each entry in OpenRef follows the structured format below: |
|
|
| | Field | Type | Description | |
| | :--- | :--- | :--- | |
| | `image` | `string` | The filename of the source image. | |
| | `relation_type` | `string` | The relationship category: `single`, `multi`, or `none` (for none-target cases). | |
| | `proposal` | `list[dict]` | A list of bounding boxes. Each dict contains normalized `[x, y, w, h]` and `original_size`. | |
| | `positive` | `string` | The referring expression that describes the target(s). The query expression. For single-target, multi-target cases, it refers to present target(s); for none-target cases, it describes an absent object to test model robustness. | |
| | `negative` | `string` | A distracting/hallucinated expression (primarily used in `multi-target, single-target` relation tasks). | |
| | `bbox_num` | `int` | Total count of target bounding boxes. `0` indicates a none-target scenario. | |
|
|
| ### 🔍 Field Details |
|
|
| * **`relation_type`**: |
| * `single`: Exactly one target exists for the `positive` expression. |
| * `multi`: Multiple instances (e.g., "yellow cars") are present; all relevant bboxes are in `proposal`. |
| * `none`: The `positive` expression describes something **not** present in the image (used to test model hallucination). |
| * **`proposal`**: |
| * Coordinates `x, y, width, height` are typically normalized to [0, 100]. |
| * `original_width/height` are provided to allow re-scaling to raw image pixels. |
| * **`bbox_num`**: |
| * The bumber of bboxes in a given expression. If `bbox_num` is 0, `proposal` must be an empty list `[]`. |
| |
| |
|  |
