What is "underexpose"

Usage examples of "underexpose".

That had been an outline, vague, like a phosphorescent photographic print, underexposed.

The only useful analogy he could devise for the experience was that of a motion picture in which he was both actor and audience member—a film with both slow and fast motion, with freeze frames and superimpositions, with the sound track from one sequence playing over the images of another, with single-frame subliminal flashes that were more felt than perceived, with long stretches of underexposed, out-of-focus pictures, and dialogue played under speed, mushy and basso.

I could see it in foreflash, underexposed, their bodies incomplete, her face a nest of scattered dusk, tangled gray light at the edges of the screen, and then I wondered if I would ever watch it, this or any part of it, and I wondered why this mute soliloquy of woman and boy should mean anything more, even to me, than what it so clearly was, face of one and head of the other, and I wondered of this commercial whether it would sell the product.

It would be the picture from his press badge—an underexposed head shot, with Tom's hair windblown and his eyes half closed—but Katie would still fall apart when she saw it, dashing to the bedroom in tears.