# How to Implement Marker-Based Tracking and 3D Visualization in 3D Slicer (Similar to Video Example)

**URL:** https://discourse.slicer.org/t/how-to-implement-marker-based-tracking-and-3d-visualization-in-3d-slicer-similar-to-video-example/41473
**Category:** Development
**Tags:** surgical-navigation
**Created:** [February 3, 2025, 9:05pm UTC](https://discourse.slicer.org/t/how-to-implement-marker-based-tracking-and-3d-visualization-in-3d-slicer-similar-to-video-example/41473 "2025-02-03T21:05:19Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Navneet](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/navneet/32/81766_2.png) [@Navneet](https://discourse.slicer.org/u/Navneet)
#### Post date: [February 3, 2025, 9:05pm UTC](https://discourse.slicer.org/t/how-to-implement-marker-based-tracking-and-3d-visualization-in-3d-slicer-similar-to-video-example/41473/1 "2025-02-03T21:05:19Z")

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**Hello 3D Slicer Community,**

I am looking to replicate a system similar to the one demonstrated in this video: [Marker-Based Tracking and Visualization in 3D Slicer](https://www.youtube.com/watch?v=MOqh6wgOOYs). The system involves:

1. Using a physical marker (e.g., fiducial/AR marker) to track an object in real-time.
2. Aligning and rendering 3D models (e.g., a cylinder or box) based on the position and orientation of the marker.
3. Real-time updates of the 3D visualization when the marker is moved.  
 ![Tracker](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/8/389b50b247b96d7c0dc158da8dccd3ebc73207f7.png)