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)

SEE ALSO

       The full documentation for teem-overrgb is maintained as a Texinfo manual.   If  the  info
       and teem-overrgb programs are properly installed at your site, the command

              info teem-overrgb

       should give you access to the complete manual.