VuforiaTrackable

StartCoroutine(CreateImageTargetFromDownloadedTexture());

IEnumerator CreateImageTargetFromDownloadedTexture()
{
    using (UnityWebRequest uwr = UnityWebRequestTexture.GetTexture("https://vuforialibrarycontent.vuforia.com/Images/devGuide_ImageTargets.jpg"))
    {
        yield return uwr.SendWebRequest();

        if (uwr.isNetworkError || uwr.isHttpError)
        {
            Debug.Log(uwr.error);
        }
        else
        {
            var objectTracker = TrackerManager.Instance.GetTracker<ObjectTracker>();

            // Get downloaded texture once the web request completes
            var texture = DownloadHandlerTexture.GetContent(uwr);

            // get the runtime image source and set the texture
            var runtimeImageSource = objectTracker.RuntimeImageSource;
            runtimeImageSource.SetImage(texture, 0.15f, "myTargetName");

            // create a new dataset and use the source to create a new trackable
            var dataset = objectTracker.CreateDataSet();
            var trackableBehaviour = dataset.CreateTrackable(runtimeImageSource, "myTargetName");

            // add the DefaultTrackableEventHandler to the newly created game object
            trackableBehaviour.gameObject.AddComponent<DefaultTrackableEventHandler>();

            // activate the dataset
            objectTracker.ActivateDataSet(dataset);

            // TODO: add virtual content as child object(s)
            var cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
            cube.transform.SetParent(trackableBehaviour.gameObject.transform);
        }
    }
}