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On Image Target Found	Activated when the target image becomes visible to the camera
On Image Target Lost	Activated the target image becomes invisible to the camera
On Image Target Unreliable Tracking	Activated when the target image is tracked with low confidence. The Image Tracker system will still provide a 6 DOF pose. But this pose might be inaccurate and might have jitter. When the tracking is unreliable one of the folling two events will happen quickly : Either the tracking will recover to Tracked or tracking will be lost and the status will change to NotTracked.
On Set Image Target Failed	Activated when the target image fails to be set.
On Set Image Target Succeeded	Activated when the target image is successfully set.

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