tlabel 0.2.0a3

TouchLabel AI - Tactile Data Annotation Toolkit

TouchLabel AI 🦞

Sensor-Agnostic Tactile Data Annotation Toolkit

load → review → export · Three steps to close the loop

中文文档

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🚀 Quick Start

pip install tlabel

import tlabel

# 1️⃣ Load — auto-detect sensor format
data = tlabel.load("gelsight_force.pkl")     # GelSight / DIGIT
data = tlabel.load("paxini_episode.h5")      # PaXini
data = tlabel.load("daimon_data/")           # Daimon (directory or .parquet)

# 2️⃣ Annotate — interactive Jupyter panel
data.review()          # Chinese UI
data.review(lang="en") # English UI

# 3️⃣ Export
data.export("output.json")   # TLabel Format v2 JSON
data.export("output.csv")    # CSV flat table

📥 Try with demo data

pip install tlabel
python -c "
import json, urllib.request
from tlabel.core.types import TLabelFrame, TLabelData

url = 'https://raw.githubusercontent.com/liesliy/tlabel/main/examples/data/demo_gelsight.json'
raw = json.loads(urllib.request.urlopen(url).read())
frames = [TLabelFrame(f['frame_idx'], f['timestamp_s'], f['tlabel_v2'], f.get('manipulation_phase','idle'), f.get('confidence',1.0)) for f in raw['frames']]
data = TLabelData(frames, raw['sensor'], raw['episode'], raw['capabilities'])
data.review()
"

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📡 Supported Sensors

Sensor	Format	Dimensions	Optical Flow	Status
GelSight Mini	.pkl	22	✅	✅ Stable
DIGIT	.pkl	22	✅	✅ Stable
Daimon DM-TacClaw	.parquet / dir	22 (video) / 20 (no video)	✅ / —	✅ Stable
PaXini PXCap	.h5 / .hdf5	20	—	✅ Stable

Force-type sensors (PaXini) lack optical images and don't support optical flow features, yielding 20 dimensions. Image-type sensors output all 22 dimensions. Daimon gracefully degrades to 20 dims when no video file is present.

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📦 Installation

# Minimal (numpy only)
pip install tlabel

# Per-sensor optional dependencies
pip install tlabel[gelsight]   # GelSight / DIGIT → opencv-python
pip install tlabel[paxini]     # PaXini → h5py
pip install tlabel[daimon]     # Daimon → pyarrow + opencv-python

# Everything
pip install tlabel[all]

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🎨 Panel Features

• 🎨 Color-coded timeline: green = contact · red = slip · gray = no contact
• 🕸 22-dim radar chart: full TLabel Format v2 visualization with bilingual labels
• ✏️ Frame & batch patching: select a range, modify in one click
• 🔗 Cascade rules: setting contact=0 auto-zeroes 7 related fields + resets manipulation_phase→idle
• 🌐 Bilingual toggle: Chinese / English, one click in the top-right corner
• 📤 Export: JSON / CSV, auto-detected by file extension

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TLabel Format v2 — 22 Dimensions

Static Features (18-dim)

#	Key	Description
1	contact	Binary contact flag
2	deformation_magnitude	Surface deformation intensity
3	force_magnitude	Normal force magnitude
4	force_peak	Peak force in episode window
5	force_direction	Force vector angle (°)
6	slip_entropy	Uncertainty of slip detection
7	slip_event	Binary slip event flag
8	texture_energy	Surface texture frequency energy
9	edge_density	Contact edge pixel ratio
10	contact_area	Contact region area ratio
11	centroid_x	Contact centroid x-position
12	normal_field_magnitude	Normal pressure field magnitude
13	normal_field_variance	Normal field spatial variance
14	shear_field_magnitude	Shear stress magnitude
15	shear_field_direction	Shear direction angle (°)
16	delta_force_normal	Frame-to-frame ΔF_normal
17	delta_force_shear	Frame-to-frame ΔF_shear
18	friction_cone_ratio	Tangential/normal force ratio

Temporal Features (4-dim, v0.2.0)

#	Key	Image-type	Force-type	Description
19	optical_flow_magnitude	✅	—	Inter-frame motion magnitude (Farneback)
20	optical_flow_direction	✅	—	Optical flow angle (°)
21	temporal_deformation_rate	✅	✅	Rate of deformation change
22	contact_transition	✅	✅	Contact state transition probability

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📖 API Quick Reference

import tlabel

# ── Loading ──
data = tlabel.load(path)                     # Auto-detect sensor format
data = tlabel.load(path, format="gelsight")  # Force specific adapter

# ── Properties ──
data.num_frames        # int — total frame count
data.duration_s        # float — episode duration
data.sensor_type       # str — sensor identifier
data.dimension_keys    # list — all dimension keys for this sensor
data.modified_count    # int — frames with manual patches

# ── Frame Access ──
frame = data[0]                          # Index access
frame = data.get_frame(42)               # By frame_idx
frame.contact                            # Contact value
frame.slip_event                         # Slip event value
frame.is_modified                        # Has patches?

# ── Patching ──
frame.patch("contact", 0)                         # Single frame (cascade=True)
frame.patch("contact", 0, cascade=False)           # No cascade
data.batch_patch(10, 50, "contact", 0)             # Range patch

# ── Review & Export ──
data.review()                    # Jupyter panel (Chinese)
data.review(lang="en")           # English
data.export("output.json")       # JSON (TLabel Format v2)
data.export("output.csv")        # CSV

Cascade Rules (contact → 0)

When contact is set to 0, these fields are automatically zeroed:

Auto-zeroed Field	Condition
force_magnitude	always
force_peak	always
slip_event	always
delta_force_normal	always
delta_force_shear	always
contact_area	always
contact_transition	only if value > 0.5
manipulation_phase	→ "idle" (if not already)

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🗂 Project Structure

tlabel/
├── core/
│   ├── types.py          # TLabelFrame / TLabelData containers
│   ├── loader.py         # Auto-detect & dispatch loading
│   └── registry.py       # Adapter registry
├── adapters/
│   ├── base.py           # BaseAdapter interface
│   ├── gelsight.py       # GelSight Mini / DIGIT
│   ├── paxini.py         # PaXini PXCap
│   └── daimon.py         # Daimon DM-TacClaw (+ video decoding)
├── viewer/
│   ├── panel.py          # Jupyter _repr_html_ renderer
│   └── templates.py      # HTML + JS + CSS template engine
└── export/
    └── writer.py         # JSON / CSV export + NumpyEncoder

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🤝 Contributing

We welcome contributions! See CONTRIBUTING.md for guidelines.

Good first issues:

• 🔌 Add a new sensor adapter (e.g., SynTouch, XELA)
• 📊 Improve radar chart UI (dark mode, interactive hover)
• 🌐 Add more language support (日本語, 한국어)
• 🧪 Add integration tests for edge cases

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📄 License

MIT © Niuzu Tech

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