More modern approach to anti-tank missiles are those with lasers being used for highlighting the target [2], while the missile has a battery and a camera to find the spot. The other approach is to do on-the-fly image recognition [3].
Edit: interesting fact: DART space craft sent by NASA to hit an asteroid used a missile derived technology to recognize the image and steer itself into the target, since direct control from Earth was not possible due to communication lag [4] (also try googling "dart mission" to see google's doodle on the topic).
1. https://en.wikipedia.org/wiki/Wire-guided_missile
2. https://en.wikipedia.org/wiki/Laser-guided_bomb
3. https://en.wikipedia.org/wiki/FGM-148_Javelin
4. https://www.nasa.gov/press-release/nasa-confirms-dart-missio...
“just”
I think the TOW missile is the most prominent example.