Partly, but not in the sense of truly “undoing” a blurred photo.

The miniature look in tilt-shift images is mainly caused by a tilted plane of focus, not just shallow depth of field. A light-field camera can simulate changes like focus, aperture, and even a virtual tilt/shift effect, so it can produce a similar tilted-focus look after capture.

However, it cannot fully reverse blur that is already baked into a single conventional photo. If a photo was taken with parts out of focus, that missing detail generally can’t be recovered.

If your goal is to photograph a real miniature and make it feel more life-size, the practical approach is usually to keep more of the model in focus. That’s commonly done with focus stacking: take multiple shots focused at different distances and combine them in software. Using a tripod helps, and some lenses may change framing slightly as focus changes (“breathing”).

So: light-field capture can simulate tilt/shift-style focus behavior, but making miniatures look more realistic usually depends more on getting sufficient depth of field—often via focus stacking—than on “reversing” tilt-shift blur.