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PNMSCALE.MAN
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pnmscale(1) Unix Programmer's Manual pnmscale(1)
NNNAAAMMMEEE
pnmscale - scale a portable anymap
SSSYYYNNNOOOPPPSSSIIISSS
pppnnnmmmssscccaaallleee _s [_p_n_m_f_i_l_e]
pppnnnmmmssscccaaallleee ---xxxsssiiizzzeee|-wwwiiidddttthhh|-yyysssiiizzzeee|-hhheeeiiiggghhhttt _s [_p_n_m_f_i_l_e]
pppnnnmmmssscccaaallleee ---xxxssscccaaallleee|-yyyssscccaaallleee _s [_p_n_m_f_i_l_e]
pppnnnmmmssscccaaallleee ---xxxssscccaaallleee|-xxxsssiiizzzeee|-wwwiiidddttthhh _s ---yyyssscccaaallleee|-yyysssiiizzzeee|-hhheeeiiiggghhhttt _s [_p_n_m_f_i_l_e]
pppnnnmmmssscccaaallleee ---xxxyyysssiiizzzeee _x _y [_p_n_m_f_i_l_e]
DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN
Reads a portable anymap as input. Scales it by the specified factor or
factors and produces a portable anymap as output. If the input file is
in color, the output will be too, otherwise it will be grayscale. You
can both enlarge (scale factor > 1) and reduce (scale factor < 1).
You can specify one dimension as a pixel size, and the other dimension
will be scaled correspondingly.
You can specify one dimension as a scale, and the other dimension will
not be scaled.
You can specify different sizes or scales for each axis.
Or, you can use the special ---xxxyyysssiiizzzeee flag, which fits the image into the
specified size without changing the aspect ratio.
All flags can be abbreviated to their shortest unique prefix.
If you enlarge by a factor of 3 or more, you should probably add a
_p_n_m_s_m_o_o_t_h step; otherwise, you can see the original pixels in the
resulting image.
SSSEEEEEE AAALLLSSSOOO
pbmreduce(1), pnmenlarge(1), pnmsmooth(1), pnm(5)
AAAUUUTTTHHHOOORRR
Copyright (C) 1989, 1991 by Jef Poskanzer.
12 January 1991 1