How good a camera would Touch ID make?

Is the Touch ID sensor good enough to deliver surveillance images (e.g. if Apple or some researcher/agency did it) ?

Would it be possible at all to get any usable imagery from the environment using only this sensor?

Maybe at least good enough to detect and distinguish gestures and motion near-field?

What is its angular/distance-specific resolution?

Scanners for example could be used as cameras in combination with advanced image processing to compensate for out-of-focus issues.