This is the command teem-overrgb that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
teem-overrgb - Composites an RGBA nrrd over a background color.
SYNOPSIS
teem-overrgb -i <nin> [-c <contrast>] [-cfp <fixed point>] \fR
DESCRIPTION
./teem-overrgb: Composites an RGBA nrrd over a background color (or image), after doing
gamma correction, then quantizes to an 8-bit image. Actually, the input nrrd can have more
than 4 values per pixel, but only the first four are used. If the RGBA nrrd is floating
point, the values are taken at face value; if it is fixed point, the values interpreted as
having been quantized (so that 8-bit RGBA images will act as you expect). When compositing
with a background image, the given background image does not have to be the same size as
the input image; it will be resampled (with linear interpolation) to fit.
[-g <gamma>] [-b <background>] [-bi <nbg>] -o <filename>
-i <nin> = input nrrd to composite (nrrd)
-c <contrast> = contrast to apply to RGB values, before gamma. "0.0"
means no change, "1.0" means thresholding, "-1.0" means a complete washout.
(double); default: "0.0"
-cfp <fixed point> = component level that doesn't change with contrast
(double); default: "0.5"
-g <gamma> = gamma to apply to image data, after contrast (double);
default: "1.0"
-b <background> = background color to composite against; white is 1 1 1,
not 255 255 255. (3 doubles); default: "0 0 0"
-bi <nbg> = 8-bit RGB background image to composite against (nrrd);
default: ""
-o <filename> = file to write output PPM image to (string)
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