This sample demonstrates image tracking. Image tracking is supported on ARCore and ARKit. To enable image tracking, you must first create an `XRReferenceImageLibrary`. This is the set of images to look for in the environment. [Click here](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.0/manual/image-tracking.html) for instructions on creating one.
You can also add images to the reference image library at runtime. This sample includes a button that adds the images `one.png` and `two.png` to the reference image library. See the script `DynamicLibrary.cs` for example code.
At runtime, ARFoundation will generate an `ARTrackedImage` for each detected reference image. This sample uses the [`TrackedImageInfoManager.cs`](https://github.com/Unity-Technologies/arfoundation-samples/blob/master/Assets/Scenes/ImageTracking/TrackedImageInfoManager.cs) script to overlay the original image on top of the detected image, along with some meta data.
Run the sample on an ARCore or ARKit-capable device and point your device at one of the images in [`Assets/Scenes/ImageTracking/Images`](https://github.com/Unity-Technologies/arfoundation-samples/tree/master/Assets/Scenes/ImageTracking/Images). They can be displayed on a computer monitor; they do not need to be printed out.
Tim Mowrer