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1991-08-11
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pnmgamma(1) Unix Programmer's Manual pnmgamma(1)
NNNAAAMMMEEE
pnmgamma - perform gamma correction on a portable anymap
SSSYYYNNNOOOPPPSSSIIISSS
pppnnnmmmgggaaammmmmmaaa _v_a_l_u_e [_p_n_m_f_i_l_e]
pppnnnmmmgggaaammmmmmaaa _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]
DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN
Reads a portable anymap as input. Performs gamma correction, 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 prefix.
SSSEEEEEE AAALLLSSSOOO
pnm(5)
AAAUUUTTTHHHOOORRR
Copyright (C) 1991 by Bill Davidson and Jef Poskanzer.
12 January 1991 1