Does face recognition work on group photos and low-light shots?

Yes. Pixeva indexes every face it can detect in a frame, including group shots, and matches a guest to all of them, not just photos where they are the main subject.

Dim reception lighting, side profiles, and partial occlusion are harder and can lower confidence, which is why a clear, front-facing selfie improves results. If a guest appears clearly in even a few frames, the match usually carries across to the harder ones — the group shots and dance-floor candids they actually want.