# Webcam-based marker tracking is available in Slicer now

**URL:** https://discourse.slicer.org/t/webcam-based-marker-tracking-is-available-in-slicer-now/565
**Category:** Support
**Tags:** surgical-navigation, feature
**Created:** [June 23, 2017, 8:35pm UTC](https://discourse.slicer.org/t/webcam-based-marker-tracking-is-available-in-slicer-now/565 "2017-06-23T20:35:40Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [June 28, 2017, 1:17pm UTC](https://discourse.slicer.org/t/webcam-based-marker-tracking-is-available-in-slicer-now/565/3 "2017-06-28T13:17:22Z")

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Good idea. An example [3D Slicer scene file is available here](https://github.com/PlusToolkit/PlusLibData/raw/master/ConfigFiles/OpticalMarkerTracker/OpticalMarkerTracker_Scene.mrb).

It displays markers that are in this [marker sheet (pdf file, ready for printing)](https://github.com/PlusToolkit/PlusLibData/blob/master/ConfigFiles/OpticalMarkerTracker/marker_sheet_36h12.pdf). You may need to zoom in-out 3D views after you place the markers in the field of view of your camera to make the markers show up.

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_[View the full topic](https://discourse.slicer.org/t/webcam-based-marker-tracking-is-available-in-slicer-now/565)._