The localizer module allows for translatory tracking. The coordinate system’s X and Y positions are adjusted to this end, but not its rotary position. And thus the localizer is suitable for objects for which rotary position is irrelevant.
Furthermore, an easy to detect feature which stands out from the rest of the image (especially high-contrast area, special shape, edge or corner) is helpful for successful tracking. Note: In addition to translatory tracking, rotary tracking is also possible. This can be set up in the coordinate system module.