SYNOPSIS:
    grey: a common field in Eccet that carries greyscale information.

DESCRIPTION:
    Some /renderer/s in Eccet require grey values from the
    initial tomography measurement. Moreover these values are usually
    needed for segmentation processes.

    This field is overloaded with the /norm/ /field/ that is used
    for rendering after segmentation (see there).

    The field is just a name for the /norm/ field.

SEE ALSO:
    norm, class, depth
