MStudio 0.1.4

A motion capture marker data visualization and editing tool

🎯 MStudio

Markerless/Marker-based Motion Capture Data Visualization & Editing Tool

Seamlessly visualize, analyze, and edit 3D marker data from motion capture systems

🚀 Quick Start • 📖 Features • 💾 Installation • 🎮 Usage • 🤝 Support

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🌟 What is MStudio?

MStudio is a user-friendly application designed for researchers, biomechanists, and motion capture professionals. It provides an intuitive interface to:

• Visualize 3D marker trajectories in real-time
• Analyze movement patterns and joint&segment angles
• Edit and filter motion capture data
• Export processed data for further analysis

Compatible with popular tools like Pose2Sim and Sports2D.

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💾 Installation

Option 1: Install from PyPI (Recommended)

# Create a virtual environment (recommended)
conda create -n mstudio python=3.10 -y
conda activate mstudio

# Install MStudio
pip install mstudio

Option 2: Install from Source

git clone https://github.com/hunminkim98/MStudio.git
cd MStudio
pip install .

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🚀 Quick Start

Launch MStudio

mstudio

That's it! The application will open with an intuitive interface ready for your motion capture data.

Load Your First Dataset

1. File → Open or drag & drop your TRC/C3D file
2. Play the animation using the spacebar
3. Explore your data with mouse controls:
   • Left click + drag: Rotate view
   • Right click + drag: Pan
   • Scroll wheel: Zoom

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📖 Features

🎯 3D Visualization Real-time 3D rendering of marker data Interactive camera controls (rotate, pan, zoom) Coordinate system switching (Y-up/Z-up) Marker label toggle for clarity Smooth 60 FPS animation playback 🦴 Skeleton Models Support for multiple skeleton formats: BODY_25B/25 (OpenPose) BODY_135 (Full body) BLAZEPOSE (MediaPipe) HALPE (26/68/136 keypoints) COCO (17/133 keypoints) MPII (16 keypoints)

📊 Analysis Tools Trajectory visualization with customizable paths Distance measurement between any 2 markers Segment angle calculation (relative to horizontal reference) Joint angle calculation using 3-point method Outlier detection with visual highlighting Frame-by-frame navigation with timeline scrubbing Multi-axis coordinate plots 🔧 Data Processing Advanced filtering: Butterworth filter Butterworth on speed Median filter Smart interpolation with pattern matching Interactive editing tools Original data preservation

🎮 Usage

Step-by-Step Tutorial

1. Load Your Data

# Launch MStudio
mstudio

# In the application:
# File → Open → Select your .trc or .c3d file
# Or simply drag & drop your file into the window

2. Basic Navigation

Action	Control
Play/Pause Animation	Spacebar or Enter
Stop Animation	Esc
Next/Previous Frame	→ / ← Arrow keys
Rotate View	Left click + drag
Pan View	Right click + drag
Zoom	Mouse wheel

3. Analysis Mode

1. Click the "Analysis" button to activate
2. Select markers by left-clicking in the 3D view:
   • 2 markers: Shows distance measurement and segment angle (relative to virtual horizontal line)
     • Left-click to cycle through reference axes (X, Y, Z)
   • 3 markers: Shows joint angle (middle marker = vertex)
3. Results display directly in the 3D viewport

4. Data Processing

• Filter data: Use the filter panel to apply Butterworth, median, or speed-based filters
• Interpolate gaps: Select problematic markers and use pattern-based interpolation
• Export results: File → Save As → Choose TRC or C3D format

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🤝 Support

Getting Help

• 📖 Documentation: GitHub Wiki (Coming Soon)
• 🐛 Bug Reports: Issue Tracker
• 💬 Discussions: GitHub Discussions
• 📧 Contact: [e-mail]

Contributing

We welcome contributions! Please see our Contributing Guidelines (Coming Soon).

Supported File Formats

• Input: TRC, C3D
• Output: TRC, C3D
• Skeleton Models: OpenPose, MediaPipe, COCO, HALPE, MPII

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🔮 Roadmap

✅ Completed Features

• 3D Visualization: Real-time marker rendering with smooth 60 FPS animation
• Skeleton Support: Multiple skeleton models (OpenPose, MediaPipe, COCO, etc.)
• Analysis Tools: Distance measurement, joint angles, segment angles
• Data Processing: Advanced filtering and interpolation
• File Support: TRC/C3D import/export functionality

🚧 In Development

• Multi-Selection: Drag-and-drop selection for multiple markers
• View Planes: Click-to-set orthogonal views (inspired by OpenSim)
• Customization: Adjustable marker size, color, and opacity
• Performance: Enhanced rendering for large datasets

🎯 Planned Features

• Multi-Person Support: Simultaneous visualization and analysis of multiple subjects
• Analysis Reports: Export comprehensive analysis results to PDF format
• Gait Analysis Mode: Specialized tools and metrics for gait analysis

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📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

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🙏 Acknowledgments

• Compatible with Pose2Sim and Sports2D
• Built with Python, OpenGL, and CustomTkinter
• Inspired by the biomechanics and motion capture community

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