pixfade — darken a pix file
pixfade darkens a color pix file by fading the entire image a fractional amount or by using a pixel value as a maximum level.
option specifies a nonnegative fractional multiplier which is used
to scale the red, green, and blue values of each pixel. In a similar
option is used to specify the multiplier as a nonnegative percentage.
The default is
-f 0.5 (
An alternative way to darken the image is to specify a ceiling pixel
level (0 - 255) with the
option. The pixel plotted is the minimum of the ceiling value and each of the
red, green, and blue levels of the pixel. If this option is used,
-p options are ignored.
flags specify the input file width and number of scan lines in pixels;
they can be set to the same value via
-s. Default is 512x512.
supplies output file name. If this option is omitted, standard output is used.
This software is Copyright (c) 1991-2016 by the United States Government as represented by U.S. Army Research Laboratory.