While traveling, a woman in a black jacket is resting on the shoulder of a man in a black jacket.
A woman rests on the shoulder of a man
Resting on the shoulder of a man is rephrased as rests on the shoulder of a man.
A woman (in a black jacket) rests on the shoulder of a man (in a black jacket).
A woman resting on the shoulder of a man implies directly from a woman in a black jacket resting on the shoulder of a man.