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ppmdither.1
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1995-07-25
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2KB
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67 lines
ppppppppmmmmddddiiiitttthhhheeeerrrr((((1111)))) XXXXEEEENNNNIIIIXXXX SSSSyyyysssstttteeeemmmm VVVV ((((11114444 JJJJuuuullllyyyy 1111999999991111)))) ppppppppmmmmddddiiiitttthhhheeeerrrr((((1111))))
NNNNAAAAMMMMEEEE
ppmdither - ordered dither for color images
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
ppppppppmmmmddddiiiitttthhhheeeerrrr [----ddddiiiimmmm _d_i_m_e_n_s_i_o_n] [----rrrreeeedddd _s_h_a_d_e_s] [----ggggrrrreeeeeeeennnn _s_h_a_d_e_s] [----
bbbblllluuuueeee _s_h_a_d_e_s] [_p_p_m_f_i_l_e]
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
Reads a portable pixmap as input, and applies dithering to
it to reduce the number of colors used down to the specified
number of shades for each primary. The default number of
shades is red=5, green=9, blue=5, for a total of 225 colors.
To convert the image to a binary rgb format suitable for
color printers, use -red 2 -green 2 -blue 2. The maximum
number of colors that can be used is 256 and can be computed
as the product of the number of red, green and blue shades.
OOOOPPPPTTTTIIIIOOOONNNNSSSS
----ddddiiiimmmm _d_i_m_e_n_s_i_o_n
The size of the dithering matrix. Must be a
power of 2.
----rrrreeeedddd _s_h_a_d_e_s The number of red shades to be used; minimum
of 2.
----ggggrrrreeeeeeeennnn _s_h_a_d_e_s The number of green shades to be used; minimum
of 2.
----bbbblllluuuueeee _s_h_a_d_e_s The number of blue shades to be used; minimum
of 2.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
pnmdepth(1), ppmquant(1), ppm(5)
AAAAUUUUTTTTHHHHOOOORRRR
Copyright (C) 1991 by Christos Zoulas.
Page 1 (printed 9/7/93)