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pnmgamma.1
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1994-08-27
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pnmgamma(1) USER COMMANDS pnmgamma(1)
NAME
pnmgamma - perform gamma correction on a portable anymap
SYNOPSIS
pnmgamma _✓v_✓a_✓l_✓u_✓e [_✓p_✓n_✓m_✓f_✓i_✓l_✓e]
pnmgamma _✓r_✓e_✓d_✓v_✓a_✓l_✓u_✓e _✓g_✓r_✓e_✓e_✓n_✓v_✓a_✓l_✓u_✓e _✓b_✓l_✓u_✓e_✓v_✓a_✓l_✓u_✓e [_✓p_✓n_✓m_✓f_✓i_✓l_✓e]
DESCRIPTION
Reads a portable anymap as input. Performs gamma correc-
tion, and produces a portable anymap as output.
The arguments specify what gamma value(s) to use. A value
of 1.0 leaves the image alone, less than one darkens it, and
greater than one lightens it.
All flags can be abbreviated to their shortest unique pre-
fix.
SEE ALSO
pnm(5)
AUTHOR
Copyright (C) 1991 by Bill Davidson and Jef Poskanzer.
Sun Release 4.0 Last change: 12 January 1991 1