Other

BALTIC

Cross-domain 3D reconstruction

Controlled monocular image sequences of a tank scene in air and underwater, varying illumination and camera motion, with externally tracked camera trajectories.

Metadata: Partial Metadata needs review

Quick facts

Vehicle type
Other
Environment
Indoor
Data origin
Real-world
Sensor count
1
Ground truth
Available
Calibration
Not reported
Annotations
Not reported

Sensor overview

High-level sensor availability before the detailed sensor records below.

Ground truth

Reference scope, method, rate, coverage, and provenance.

Ground-truth references for BALTIC
Scope Method Reference system Count Rate Coverage Reference provenance
External
Measured using equipment independent of the platform’s normal onboard sensor pipeline.
Derived
Computed primarily from the dataset’s own recorded sensors.
Hybrid
Combines independent reference equipment with onboard measurements.
6DoF Motion capture HTC Vive 2 controllers Not reported Unknown Reference provenance
External
Measured using equipment independent of the platform’s normal onboard sensor pipeline.
Derived
Computed primarily from the dataset’s own recorded sensors.
Hybrid
Combines independent reference equipment with onboard measurements.
External
Accuracy notes
Reported tracking errors below 3 mm translation and 0.3 degrees rotation; not a release-wide independent validation.
Reference notes
Controllers remain in air on a stick while the camera records underwater; fused tracking estimates the camera trajectory. The devkit parses E*-tf.txt reference data.

Calibration and synchronization

Reported calibration level, reproducibility signals, and supporting notes.

Level
Not reported
Processed parameters
Not reported
Raw calibration data
Not reported
Calibration targets
Not reported

Calibration data

Calibration reproducibility details are not reported.

Notes

Separate fisheye calibrations in air and clear water have residuals of 0.22 and 0.55 px; dome-centering correction suppresses refraction. Distribution of parameters and raw calibration data is not established.

Known or intentional limitations

Reported constraints and characteristics to check before using the dataset.

Controlled tank scale and conditions do not capture real underwater scene dynamics and variability.

Full radiometric calibration is outside the evaluation; cross-domain matching depends on scene stability and object type.

Occlusion, low texture and surface changes can limit cross-domain augmentation.

Cameras

monocular

Model
Not reported
Setup
Mono
Count
1
Effective cameras
1
Modality
Rgb
Resolution
Not reported
Rate
Not reported
Shutter
Not Reported
Lens type
Fisheye
HFOV
Not reported
VFOV
Not reported
Notes
Acquisition uses a fisheye lens; air and water images are undistorted into a common pinhole representation for evaluation. Native lens viewing angles are not asserted as delivered-image FOV.

IMUs

Not reported

GNSS

Not reported

LiDAR

Not reported

Radar

Not reported

Pitot tube

Not reported

Additional sensors

Not reported

Annotations

Reported annotation availability and task support.

Availability
Not reported
Format
Not reported
Class count
Not reported
Semantic segmentation Not reported
Instance segmentation Not reported
Object detection Not reported
Optical flow Not reported
Depth ground truth Not reported

Citation

Citation key and BibTeX kept at the end of the page for reference.

Citation key
Not reported

BibTeX

Not reported

Dataset corrections

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