Provided by: netpbm_11.09.02-2_amd64 

NAME
ppmbrighten - replaced by pambrighten
DESCRIPTION
This program is part of Netpbm(1).
Starting with Netpbm 10.86 (March 2019), ppmbrighten is obsolete. Use pambrighten(1) instead.
pambrighten is mostly backward compatible with ppmbrighten. You can use the pambrighten manual for
ppmbrighten as long as you ignore features that were added after Netpbm 10.86.
One way in which pambrighten is not backward compatible is that
pambrighten does not have a -normalize option. If you want
that function, use pnmnorm on the image before passing it to
pambrighten.
Another backward incompatibility is that pambrighten produces the
same kind of output as the input, whereas ppmbrighten always
produces PPM. If you need PPM output, pass the results through
ppmtoppm.
ppmbrighten is currently implemented as a triviel program that
invokes pambrighten, pnmnorm, and ppmtoppm.
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation
is at
http://netpbm.sourceforge.net/doc/ppmbrighten.html
netpbm documentation 09 August 2020 Ppmbrighten User Manual(1)