Datasets:
Trim the card and fix badge layout
Browse filesReaders arrive from the paper or the blog, so the card no longer restates the
capture protocol, calibration steps, annotation pipeline, or per-method
benchmark findings, all of which are covered better there. What remains is what
decides whether to request access: scale, modalities, the two capture scales,
the precision figures, and the access terms. Body drops from ~400 lines to ~170,
and from seven figures to one.
Badges were stacking because HF only exempts shields.io images from its
'a:has(img:only-child) { display: block }' rule when they are wrapped in a link;
the two unlinked ones broke the row. All four now link.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
README.md
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</p>
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<p>
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<a href="https://ace-data-engine.github.io/ACE-Data-0/"><img src="https://img.shields.io/badge/Blog-ACE--Data--0-0054A6?logo=googlechrome&logoColor=white" alt="Blog"></a>
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<img src="https://img.shields.io/badge/Technical_Report-Coming_Soon-6B7280" alt="Technical report coming soon">
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<a href="./LICENSE"><img src="https://img.shields.io/badge/License-Research_Only-A33B20" alt="Research-only license"></a>
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<img src="https://img.shields.io/badge/Data_Files-Coming_Soon-6B7280" alt="Data files coming soon">
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</p>
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<p>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/data-teaser.webp" width="100%" alt="ACE-Data-0 teaser: table-scale and room-scale ambient capture with synchronized multi-modal streams">
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</p>
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<p>
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<b>ACE
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</p>
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<p>
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▶ <a href="https://ace-data-engine.github.io/ACE-Data-0/assets/videos/teaser-video.mp4">
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·
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<a href="https://ace-data-engine.github.io/ACE-Data-0/">
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</p>
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</div>
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##
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transforms real home environments into spatially calibrated, temporally synchronized recording
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studios. ACE operates at two complementary scales:
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- **Table-scale capture** resolves fine-grained hand-object manipulation around work surfaces.
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- **Room-scale capture** preserves whole-body motion, locomotion, and interactions distributed
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across a furnished home.
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Across both settings, ACE records egocentric and multi-view exocentric video, full-body and
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articulated hand motion, high-fidelity object geometry and 6-DoF trajectories, multi-channel audio,
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and tactile signals as a unified multisensory stream.
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Using ACE, we build **ACE-Data-0**, a large-scale dataset of natural, goal-directed household
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activity spanning atomic manipulation, long-horizon chains of household activities, and human-scene
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interaction.
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### Dataset Scale
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| Statistic | ACE-Data-0 |
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| --- | ---: |
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| Recorded activity | 150 hours+ |
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| Video frames | 17M+ |
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| Capture environments | 2 |
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| Views per moment | 8+ exocentric, plus 4 egocentric fisheye |
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| Take length | minutes, not seconds; up to 20-30 min for long-horizon chains |
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| Raw data rate | approx. 1 TB per hour of session |
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These values describe the planned ACE-Data-0 release and will be verified in the final release
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manifest.
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An *episode* is a contiguous segment of interaction that realizes one meaningful sub-goal, the
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smallest unit that stays semantically self-contained as a training example. Episodes are counted
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within takes rather than recorded in isolation, so the actions preceding and following each segment
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are preserved in the same stream.
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audio, and touch are recorded in one pass, on one clock, in one world frame, not assembled from
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separate sources.
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- **Real homes, not laboratories.** The room-scale site is a fully furnished 200 m² apartment. The
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clutter, furniture occlusion, and spatial constraints that lab capture removes are exactly what
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makes home interaction hard, and they are kept.
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- **Long horizons.** Participants receive **goal-level** instructions ("prepare a cup of tea and
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serve it at the table") rather than step-by-step scripts. Planning, hesitation, and improvisation
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enter the data by themselves.
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- **Annotations are measured, not estimated.** Human states, object states, and contact are
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metrically tracked or directly sensed. Pose reprojections, bounding boxes, motion trails, and
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contact events follow by projection, with no estimation model in the loop. Only the textual
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descriptions are generated, and those are human-verified.
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Each take is organized around a shared timeline and a shared world coordinate frame.
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| Modality | Contents | Role |
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| --- | --- | --- |
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| Egocentric video | 4 fisheye views, IMU readings, per-frame 6-DoF headset pose from the tracked rig | Participant-centric perception |
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| Exocentric video | 8 synchronized fixed-camera views, each with intrinsics and world-frame pose | Scene, body, and object context |
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| Human motion | 41-joint body skeletons plus converted SMPL-X parameters | Metric kinematic supervision |
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| Hand motion | Articulated hand state and per-view projections | Dexterous manipulation supervision |
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| Object state | Scanned or 2DGS-reconstructed meshes, identity, 6-DoF pose at 60 Hz, motion trails | Dynamic scene-state supervision |
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| Audio | Synchronized multi-source audio from the exocentric cameras and the headset | Contact, appliance, and ambient events |
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| Tactile | Hand-shaped pressure grids with calibrated normalization and baseline correction | Physical interaction supervision |
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| Calibration | Camera intrinsics, extrinsics, headset pose, world registration, cross-stream timeline | Cross-view and cross-modal alignment |
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| Language | Goal- and activity-level descriptions | Semantic supervision |
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Because every take ships its calibration and its timeline as data, any tracked 3D point can be
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projected onto any pixel of any view, and any two streams can be paired at any instant. Modalities
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can therefore be combined freely for training, as inputs or as supervision, without rerunning any
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part of the capture pipeline.
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### Annotations
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| Type | Contents |
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| --- | --- |
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| Audio
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| --- | --- | --- |
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| **Atomic HOI** | 1-3 household tasks drawn from 15+ activity types (pouring water, drinking, making tea, watering plants, chopping vegetables, cooking, tidying up) | ~3 min |
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| **Chain of HOI** | the full range of short tasks combined into one continuous activity; sub-tasks interleave freely, and every take ends with the scene tidied back into order | ~20-30 min |
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| **Human-Scene Interaction (HSI)** | almost no objects; whole-body motion (walking, exercising) and human-scene contact (sitting, lying, leaning) with tables, chairs, and sofas | ~5 min |
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<div align="center">
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/script-example.webp" alt="Examples of ACE-Data-0 task categories and long-horizon capture scripts" width="88%">
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<br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/statistics.webp" alt="ACE-Data-0 task families and dataset statistics" width="88%">
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</div>
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## Dataset Creation
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### Capture System
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| | Table-scale | Room-scale |
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| --- | --- | --- |
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| Space | ~30 m²
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| Target | fine-grained
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| Exocentric RGB | 8 × GoPro at
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| Optical mocap | 16 × OptiTrack PrimeX 22 | 12 × OptiTrack PrimeX 22 |
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| Hand pose |
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| Objects | 25+ interactable instances, 8+ categories | 25+ interactable instances |
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**Shared across both sites**
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| Device | Role | Spec |
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| --- | --- | --- |
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| ACE-Ego-Head-V02 Lite | Egocentric capture | 4 fisheye cameras (front/rear, L/R), 1088×1280 @ 20 FPS, onboard IMU, 5 tracked markers |
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| OptiTrack PrimeX 22 | Optical motion capture | 2048×1088 @ 60 Hz; 41 body markers per participant, plus objects and the ego rig |
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| ACE-Sense-Glove Lite | Contact pressure | full-palm pressure map, both hands |
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| GoPro / ACE-Ego-Head | Audio | contact events, appliance operation, ambient scene sound |
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<table align="center" width="100%">
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<tr>
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<td width="50%" align="center"><img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/setup-ace-t.webp" width="100%" alt="Table-scale configuration"></td>
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<td width="50%" align="center"><img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/setup-ace-r.webp" width="100%" alt="Room-scale configuration"></td>
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</tr>
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<tr>
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<td align="center"><sub><b>Table-scale configuration</b></sub></td>
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<td align="center"><sub><b>Room-scale configuration</b></sub></td>
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</tr>
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</table>
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### Capture Protocol
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Participants receive household goals rather than fixed sequences of atomic actions. They choose
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routes, object instances, grasp strategies, subtask order, pauses, and recovery behavior. This
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preserves natural variation while keeping the activity goal and the measured physical state
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available as supervision. Each participant completes all designed tasks across a 2-day session.
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Every session follows the same five-step protocol at both sites:
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1. **Scene preparation.** Objects are placed at randomized yet plausible initial positions.
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2. **Participant setup.** The participant puts on the mocap suit, the headset, and the gloves, then
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performs a short T-pose routine that registers their skeleton with the tracking system.
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3. **Task briefing.** The participant receives a goal-level instruction verbally; how to achieve it
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is left entirely to them.
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4. **Recording.** The take opens with the clock glance described below, after which all sensors
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record continuously while an operator monitors stream health on a live dashboard.
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5. **Post-checks.** Synchronization and tracking quality are verified after each take, and failed
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takes are flagged for re-capture.
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<div align="center">
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/data-procedure.webp" alt="ACE capture, temporal synchronization, and annotation workflow" width="88%">
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</div>
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### Temporal Synchronization
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All devices are registered to the OptiTrack 60 Hz clock, which internally delivers strictly
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simultaneous frames. Because recorded camera timestamps lag true exposure by approximately 0.29 s
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and drift slowly, we instead let each camera **photograph a clock**: the mocap host displays its own
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time as a nanosecond-resolution QR code, and readings sampled across a take are fitted with a
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constant offset plus a slow drift.
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- Residual alignment error: **millisecond level** (within a single mocap frame).
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- Egocentric fisheye views, mutual misalignment: **< 2 ms**.
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- Independent check, per-camera offsets re-estimated during calibration: **< 4 ms**.
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- Tactile gloves are aligned to the headset by matching correlated IMU motion templates.
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Every take ships a table mapping each camera frame, egocentric and exocentric alike, to its 60 Hz
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mocap frame.
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### Spatial Calibration
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*measured* rather than estimated, and do not drift.
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### Annotation Process
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Most annotations are derived from the synchronized and calibrated capture system rather than
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estimated independently from video. Because the human and object annotations come from measured 3D
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states rather than image-based detectors, they remain correct where detectors typically fail: under
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furniture occlusion, extreme viewpoints, and motion blur.
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Textual descriptions are the one generated type. Gemini-3.1-pro-preview watches the ego-view video
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and describes each time span in natural language, segment by segment; human annotators then check
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the auto-generated labels and correct the descriptions by hand.
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<div align="center">
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<b>Human pose annotation</b><br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/annotation-smplx-sg.webp" alt="Human pose annotation across synchronized views and 3D motion" width="88%">
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<br><br>
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<b>Object state annotation</b><br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/annotation-obj-sg.webp" alt="Object state annotation across synchronized views and 3D motion" width="88%">
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<br><br>
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<b>Articulated hand annotation</b><br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/annotation-hand.webp" alt="Articulated hand annotation" width="88%">
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<br><br>
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<b>Tactile annotation</b><br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/annotation-tactile.webp" alt="Tactile annotation" width="88%">
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<br><br>
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<b>Language annotation</b><br>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/annotation-caption.webp" alt="Language annotation" width="88%">
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</div>
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### Source Data
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ACE-Data-0 consists of original recordings collected with the ACE capture system. It is not
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assembled from scraped internet video or third-party household datasets.
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## Benchmark
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must chain together: sensing contact, estimating scene state, mastering hand-object coordination.
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**1. Low-level signals: tactile from vision.** Predict full-hand grasp pressure from egocentric
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video, evaluated against synchronized glove measurements (temporal accuracy, contact IoU, volumetric
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IoU, center-of-pressure error). *Finding:* detecting **when** contact occurs is far easier than
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recovering **where** pressure is distributed. The best method's absolute C-IoU and V-IoU remain
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modest, and a substantial generalization gap persists.
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**2. Scene components: human motion estimation.** 22 methods across per-frame, temporal,
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scene-aware, single-view exo, multi-view exo, and egocentric settings, all against the same metric
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ground truth. *Findings:* (i) strong Procrustes-aligned pose accuracy does **not** imply an accurate
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world-frame trajectory, and the two rankings differ; (ii) scene context mainly helps locate the body
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in the room rather than improve joint configuration; (iii) egocentric methods lag because much of
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the body is out of frame.
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**3. Embodied interaction: hand motion from ego and exo views.** The same interactions are recorded
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simultaneously from both viewpoints, so the comparison changes only the viewpoint. *Findings:*
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exocentric methods reach approximately 9.1 mm PA-MPJPE and a 63 mm world-frame trajectory error,
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while egocentric world-space methods remain near 100 mm. This points at **egomotion estimation**,
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not finger articulation, as the dominant error source in egocentric hand reconstruction.
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### Intended Uses
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ACE-Data-0 is intended for non-commercial academic research on:
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- Embodied perception and interaction understanding
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- Human and hand motion recovery
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- Human-object and human-scene interaction
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- Multi-view and egocentric video understanding
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- Cross-modal learning across vision, motion, audio, and touch
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- Object-state estimation and dynamic 3D scene understanding
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- Imitation learning, world models, and vision-language-action systems
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### Out-of-Scope and Prohibited Uses
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The dataset is not intended for:
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- Identifying, re-identifying, or profiling participants
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- Biometric recognition or surveillance
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- Inferring sensitive personal attributes
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- Training systems for harmful, deceptive, or privacy-invasive applications
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- Any commercial purpose
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- Representing all homes, cultures, bodies, abilities, or household practices without further
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validation
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The [ACE-Data-0 Research License Agreement](./LICENSE) is binding and defines the full set of
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restrictions.
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### Personal and Sensitive Information
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All participants volunteered and signed a written informed consent form covering data collection and
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research release, including the appearance of their faces. The dataset contains identifiable
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individuals. Any attempt to identify, contact, locate, or infer private attributes of a participant,
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and any use of the data for biometric identification, surveillance, or profiling, is prohibited by
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the license and will result in access being revoked.
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- **Instrumented ground truth.** Tracked objects must be scanned and marked in advance. State
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changes of articulated mechanisms, fluids, and deformable materials are not annotated.
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- **Visible instrumentation.** The mocap suit, gloves, headset, and markers appear in the recordings
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and may introduce dataset-specific visual cues.
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3. Access is **personal and non-transferable**. Collaborators and students must each submit their
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own request; redistributing the data terminates your licence and revokes your access.
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repository instead of submitting the form.
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> access across the release.
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## License
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access.
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## Citation
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If you use ACE-Data-0 in your research, please cite:
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```bibtex
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@article{cao2026acedata0,
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title = {ACE-Data-0: Human-Centric Ambient Capture as Embodied Data Engine},
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@@ -500,14 +281,9 @@ If you use ACE-Data-0 in your research, please cite:
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}
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```
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The arXiv identifier
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posted.
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## Contact
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version.
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Questions about access, licensing, or annotations should be raised on the Community tab of this
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repository.
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</p>
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<p>
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<a href="https://ace-data-engine.github.io/ACE-Data-0/"><img src="https://img.shields.io/badge/Blog-ACE--Data--0-0054A6?logo=googlechrome&logoColor=white" alt="Blog"></a>
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<a href="https://ace-data-engine.github.io/ACE-Data-0/"><img src="https://img.shields.io/badge/Technical_Report-Coming_Soon-6B7280" alt="Technical report coming soon"></a>
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<a href="./LICENSE"><img src="https://img.shields.io/badge/License-Research_Only-A33B20" alt="Research-only license"></a>
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<a href="https://ace-data-engine.github.io/ACE-Data-0/"><img src="https://img.shields.io/badge/Data_Files-Coming_Soon-6B7280" alt="Data files coming soon"></a>
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</p>
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<p>
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<img src="https://ace-data-engine.github.io/ACE-Data-0/assets/images/data-teaser.webp" width="100%" alt="ACE-Data-0 teaser: table-scale and room-scale ambient capture with synchronized multi-modal streams">
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</p>
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<p>
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<b>ACE turns real home environments into spatially calibrated, temporally synchronized recording studios for embodied AI.</b>
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</p>
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<p>
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▶ <a href="https://ace-data-engine.github.io/ACE-Data-0/assets/videos/teaser-video.mp4">Demo video</a>
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·
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<a href="https://ace-data-engine.github.io/ACE-Data-0/">Full story, figures, and interactive examples on the blog</a>
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</p>
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</div>
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## What this is
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Learning to act in the physical world requires more than observing what an action looks like: models
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must capture how first-person perception, whole-body motion, dexterous manipulation, object state,
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sound, and touch evolve **together** as humans pursue goals over time. Existing datasets fragment
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this experience across viewpoints, modalities, or spatial scales.
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ACE-Data-0 records all of it in one pass, on one clock, in one world frame. Participants receive
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**goal-level** instructions ("prepare a cup of tea and serve it at the table") rather than
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step-by-step scripts, so planning, hesitation, and improvisation enter the data by themselves. Human
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states, object states, and contact are metrically tracked or directly sensed, so the annotations are
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**measured rather than estimated**: they stay correct under furniture occlusion, extreme viewpoints,
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and motion blur, where image-based detectors fail.
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| --- | ---: |
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| Recorded activity | 150 hours+ |
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| Video frames | 17M+ |
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| Capture environments | 2 |
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| Views per moment | 8+ exocentric, plus 4 egocentric fisheye |
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| Take length | minutes, not seconds; up to 20-30 min for long-horizon chains |
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These values describe the planned release and will be verified in the final release manifest.
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## What each take contains
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Every take shares one timeline and one world coordinate frame, and ships its own calibration and
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sync tables as data. Any tracked 3D point can therefore be projected onto any pixel of any view, and
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any two streams paired at any instant, without rerunning any part of the capture pipeline.
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| Modality | Contents |
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| --- | --- |
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| Egocentric video | 4 fisheye views @ 20 FPS, IMU, per-frame 6-DoF headset pose from the tracked rig |
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| Exocentric video | 8 synchronized views @ 30 FPS, each with intrinsics and world-frame pose |
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+
| Human motion | 41-joint skeletons, articulated hand poses, converted SMPL-X parameters |
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+
| Object state | scanned or 2DGS meshes, 6-DoF pose @ 60 Hz, 2D/3D boxes in all views, motion trails |
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+
| Audio | multi-source, from the exocentric cameras and the headset |
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+
| Tactile | full-palm pressure grids, normalized and baseline-corrected |
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+
| Language | per-segment activity descriptions, take goal, and its sequence of sub-goals |
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+
Takes come in three families: **atomic HOI** (1-3 household tasks, ~3 min), **chains of HOI** (one
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+
continuous activity of ~20-30 min ending with the scene tidied back into order), and **human-scene
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+
interaction** (whole-body motion and furniture contact, almost no objects, ~5 min).
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## How it was captured
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| | Table-scale | Room-scale |
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| --- | --- | --- |
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+
| Space | ~30 m² desk workspace | ~200 m² furnished apartment |
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+
| Target | fine-grained hand-object manipulation | whole-body activity and locomotion |
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+
| Exocentric RGB | 8 × GoPro at 0.3-0.5 m | 8 × ZED One, at least 4 views on any point |
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| Optical mocap | 16 × OptiTrack PrimeX 22 | 12 × OptiTrack PrimeX 22 |
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+
| Hand pose | triangulated from 8 exo views, manually refined | Manus mocap gloves @ 60 Hz |
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+
Participants wear an ACE-Ego-Head-V02 Lite headset (4 fisheye cameras, IMU, 5 tracked markers), a
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+
41-marker mocap suit, and full-palm tactile gloves.
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| 205 |
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| 206 |
+
Two numbers carry the credibility of everything above. **Temporal:** all devices are registered to
|
| 207 |
+
the OptiTrack 60 Hz clock by photographing a nanosecond-resolution clock displayed on the mocap
|
| 208 |
+
host, giving millisecond-level residuals, within a single mocap frame. **Spatial:** an ArUco board
|
| 209 |
+
with retroreflective corners bridges exocentric cameras that share no field of view (median
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| 210 |
+
reprojection error < 3 px), while the headset is solved by hand-eye calibration against its tracked
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+
rig (~2 px), so egocentric camera poses are measured rather than estimated and do not drift.
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| 212 |
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+
The blog and the technical report cover the capture protocol, calibration, and annotation pipeline
|
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+
in full.
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| 215 |
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| 216 |
## Benchmark
|
| 217 |
|
| 218 |
+
We hold out 10 hours as a test set and evaluate 30+ published methods across three levels: tactile
|
| 219 |
+
inference from video, human motion recovery, and hand motion from egocentric and exocentric views.
|
| 220 |
+
Existing methods degrade sharply under contact, occlusion, egomotion, and long horizons. In
|
| 221 |
+
particular, strong per-frame pose accuracy does not imply an accurate world-frame trajectory, and
|
| 222 |
+
egomotion, not finger articulation, dominates the error in egocentric hand reconstruction. Full
|
| 223 |
+
tables are in the technical report.
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| 224 |
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| 225 |
+
## Access
|
| 226 |
|
| 227 |
+
This repository is **gated**. Access is granted to named individuals for **non-commercial academic
|
| 228 |
+
research only**, and takes effect once you accept the terms on the access form above.
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|
| 229 |
|
| 230 |
+
- Use your **institutional** email and describe your intended research. What you submit is recorded
|
| 231 |
+
as part of your licence; inaccurate information is a breach of the agreement.
|
| 232 |
+
- Access is **personal and non-transferable**. Collaborators and students must each submit their own
|
| 233 |
+
request. Redistributing the data terminates your licence and revokes your access.
|
| 234 |
+
- For commercial licensing or industrial collaboration, open a thread on the Community tab instead
|
| 235 |
+
of submitting the form.
|
| 236 |
|
| 237 |
+
> **Data files are not published yet.** Repository layout, storage requirements, checksums, and
|
| 238 |
+
> loading examples will be added at release time. Because the streams are large, the release will
|
| 239 |
+
> use sharded archives rather than direct browser downloads. Approved users keep their access.
|
| 240 |
|
| 241 |
+
## Intended and prohibited uses
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|
| 242 |
|
| 243 |
+
Intended for non-commercial academic research on embodied perception, human and hand motion
|
| 244 |
+
recovery, human-object and human-scene interaction, egocentric and multi-view video understanding,
|
| 245 |
+
cross-modal learning across vision, motion, audio, and touch, and imitation learning, world models,
|
| 246 |
+
and vision-language-action systems.
|
| 247 |
|
| 248 |
+
**Not** for identifying, re-identifying, or profiling participants; biometric recognition or
|
| 249 |
+
surveillance; inferring sensitive personal attributes; any commercial purpose; or representing all
|
| 250 |
+
homes, cultures, bodies, abilities, or household practices without further validation. The
|
| 251 |
+
[LICENSE](./LICENSE) is binding and defines the full set of restrictions.
|
| 252 |
|
| 253 |
+
All participants volunteered and signed informed consent covering data collection and research
|
| 254 |
+
release, including the appearance of their faces. **The dataset contains identifiable individuals.**
|
| 255 |
+
If you are a participant and want your recordings withdrawn, reach us through the Community tab and
|
| 256 |
+
the affected takes will be removed from subsequent releases.
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|
| 257 |
|
| 258 |
+
## Limitations
|
|
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|
| 259 |
|
| 260 |
+
Two sites only, so limited variation in layouts, furnishings, and lighting. Tracked objects must be
|
| 261 |
+
scanned and marked in advance, and state changes of articulated mechanisms, fluids, and deformable
|
| 262 |
+
materials are not annotated. The mocap suit, gloves, headset, and markers are visible in the
|
| 263 |
+
recordings and may introduce dataset-specific visual cues.
|
|
|
|
| 264 |
|
| 265 |
## License
|
| 266 |
|
| 267 |
+
[ACE-Data-0 Research License Agreement](./LICENSE): non-commercial academic research only, no
|
| 268 |
+
redistribution, no re-identification. Read it in full before requesting access.
|
|
|
|
| 269 |
|
| 270 |
## Citation
|
| 271 |
|
|
|
|
|
|
|
| 272 |
```bibtex
|
| 273 |
@article{cao2026acedata0,
|
| 274 |
title = {ACE-Data-0: Human-Centric Ambient Capture as Embodied Data Engine},
|
|
|
|
| 281 |
}
|
| 282 |
```
|
| 283 |
|
| 284 |
+
The arXiv identifier is a placeholder and will be replaced when the report is posted.
|
|
|
|
| 285 |
|
| 286 |
## Contact
|
| 287 |
|
| 288 |
+
Project updates on the [blog](https://ace-data-engine.github.io/ACE-Data-0/). Questions about
|
| 289 |
+
access, licensing, or annotations belong on the Community tab of this repository.
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