Ppmbrighten User Manual(0)

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Starting with Netpbm 10.86 (March 2019), ppmbrighten is obsolete.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