EMSI Video Tracker

The video below shows an example of the EMSI Video Tracker tracking an aircraft with a cloudy background. The tracker is operating in a gated video tracker mode. The target gate is the red rectangle. Only pixels within the current target gate are considered as potential target pixels. There is another "background gate" that surrounds the target gate. This background gate is not drawn on the video. Pixel intensities and colors that exist in the background gate are excluded from consideration as potential target pixels in the target gate. This technique allows the tracker to successfully follow the target as the background changes. Note that the target is successfully followed as it passes in front of the sun! The target is lost when the same grey target color is found in the background gate. At this point, a gated video tracker cannot distinguish the target from the background.

Target pixels are highlighted in the video on the right. Target pixels are not highlighted in the video on the left. Note that the green cross indicating the target centroid follows the target in a very stable manner. Many competing trackers exhibit a target centroid jitter that is caused by the presence of extraneous false target points within the target gate. We have virtually eliminated this centroid jitter within the EMSI Video Tracker.