esper man page

esper — Enhance 224 to 176. Go right. Enhance 57 19. Track 45 left.


esper [-display host:display.screen] [-visual visual] [-window] [-root] [-delay number] [-speed number] [-titles] [-fps]


"Enhance 224 to 176. Pull out track right. Center in pull back. Pull back. Wait a minute. Go right. Stop. Enhance 57 19. Track 45 left. Gimme a hardcopy right there."

The Esper Machine was a voice-controlled forensic device used by LAPD in 2019, as documented in the 1982 film, Blade Runner.  It was capable of enhancing photographs to an extreme degree, including reconstructing different viewpoints within the space from the reflections on various objects in the photograph.


-visual visual

Specify which visual to use.  Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual.


Draw on a newly-created window.  This is the default.


Draw on the root window.

-delay number

Per-frame delay, in microseconds.  Default: 20000 (0.02 seconds).

-speed number

Animation speed.  2.0 means twice as fast, 0.5 means half as fast.

-titles | -no-titles

Show file names.  Boolean.

-fps | -no-fps

Whether to show a frames-per-second display at the top of the screen.



to get the default host and display number.


to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.

See Also

X(1), xscreensaver(1)


Jamie Zawinski.


5.38-2.fc28.1 (10-Feb-2018) X Version 11 XScreenSaver manual