| --- |
| license: cc-by-4.0 |
| pretty_name: ITW Pipeline Visualization Assets |
| tags: |
| - 3d-object-detection |
| - object-tracking |
| - video |
| - visualization |
| language: |
| - en |
| --- |
| |
| # ITW Pipeline Visualization — assets |
|
|
| Rendered assets for the visualization site of an in-the-wild **open-vocabulary |
| 3D video object tracking** project. Each pipeline takes an RGB video plus a text |
| category label and produces a per-frame 3D bounding-box trajectory; the site |
| shows what each one made of the same clip. |
|
|
| This repository holds only the **heavy media** the site streams at runtime: |
| per-frame depth and colour for the browser-side point cloud, overlay renders, |
| and gallery previews. The site itself is static and hosted separately; it |
| fetches these files cross-origin. |
|
|
| > These are derived visualization artifacts, not training data. Every frame |
| > originates from a source dataset — see **Datasets and attribution**. |
|
|
| ## Datasets and attribution |
|
|
| Assets are grouped by source dataset. **Each dataset's assets carry that |
| dataset's own licence and attribution.** More datasets will be added; this table |
| is the authoritative list of what is currently present. |
|
|
| | id | source dataset | licence | attribution | |
| |---|---|---|---| |
| | `sav` | [SA-V](https://ai.meta.com/datasets/segment-anything-video/) (Segment Anything Video, Meta AI) | CC BY 4.0 | Ravi et al., *SAM 2: Segment Anything in Images and Videos*, 2024 | |
|
|
| Derived overlays and depth encodings are redistributed under the licence of the |
| dataset they derive from. The repository-level licence tag reflects the sources |
| currently included and will be revisited as datasets with different terms are |
| added — always read the table above rather than the tag alone. |
|
|
| ## Layout |
|
|
| ``` |
| assets/<dataset_id>/<video_id>/ |
| ├── preview.mp4 · poster.jpg · strip.jpg gallery preview |
| └── <pipeline_id>/ |
| ├── manifest.json frames, intrinsics, metric camera-to-world poses |
| ├── boxes.json per-object per-frame 3D boxes (see conventions) |
| ├── visualizations.json what overlays exist, and at what cadence |
| ├── depth/000000.webp … uint16 metric depth, packed into R and G |
| ├── rgb/000000.jpg … colour for the point cloud |
| └── overlays/<name>/ |
| ├── video.mp4 for playback |
| └── frames/NNNNNN.jpg stills at that overlay's own cadence |
| ``` |
|
|
| Pipelines currently present: `wilddet3d` (prompt-and-detect). Overlays currently |
| present: `input` (source video with ground-truth masks), `box_prompt`, |
| `point_prompt`. |
|
|
| ## Conventions |
|
|
| These hold across every dataset and pipeline in this repository. |
|
|
| **Depth.** WebP with the 16-bit value split across the red and green channels, |
| because no single-channel 16-bit format decodes reliably across browsers: |
|
|
| ``` |
| z_metres = (R * 256 + G) / 65535 * depth_max_m # z == 0 means invalid |
| ``` |
|
|
| `depth_max_m` is per clip, in `manifest.json`. Depth is metric metres, camera-Z, |
| OpenCV axes (x right, y down, z forward). |
|
|
| **Boxes.** Camera frame — the detector applies no extrinsic. Multiply by the |
| per-frame `c2w` in `manifest.json` for world frame. Each box carries `center`, |
| `dims_xyz` (extents along the box's own axes), `quat_wxyz`, and `corners`. |
|
|
| **Corner order** is canonical and identical across pipelines: |
|
|
| ``` |
| 0 (-,-,-) 1 (+,-,-) 2 (+,+,-) 3 (-,+,-) |
| 4 (-,-,+) 5 (+,-,+) 6 (+,+,+) 7 (-,+,+) |
| ``` |
|
|
| Edges: bottom `0-1-2-3-0`, top `4-5-6-7-4`, verticals `0-4 1-5 2-6 3-7`. Corners |
| are validated elementwise against `center + (signs · dims/2) @ Rᵀ` before |
| export, because IoU is order-invariant and cannot catch an ordering mistake. |
|
|
| **Frame indices** are always native source-video frames, so overlays at |
| different cadences share one timeline. Every overlay video is encoded at the |
| source frame rate with its content held between updates, so all overlays for a |
| clip have identical duration and stay in sync under a single playback rate. |
|
|
| **Annotation cadence is preserved, not interpolated.** Where a source dataset |
| annotates below video rate — SA-V labels every 4th frame at 24 fps, giving 6 Hz |
| masks — the overlay holds the previous annotation rather than inventing |
| intermediate ground truth, and `visualizations.json` records the true cadence. |
|
|
