Cameras work in pixel and angular domain, spatial distances don't really matter. Infact target discrimination in IR against mostly cold background is much easier than optical discrimination at low altitudes against a cluttered background.
Obviously military equipment has their unique set of requirements, but physics work the same no matter if you're civilian or military, the distinction between military and civilian technology is often not nearly as big as most people think.
Case in point fighter EODAs sensor fusion obviously have added requirement to defeat dazzlers and targets that actively try to prevent tracking, and might have filters to discriminate missiles from aircraft, but at end of the day you're still tracking aerial targets and then taking action based on tracking data, the technology isn't fundamentally different.
