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Интерактивная система просмотра системных руководств (man-ов)

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tiffmedian ()
  • >> tiffmedian (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • tiffmedian (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • 
    NAME
         tiffmedian - apply the median cut algorithm  to  data  in  a
         TIFF file
    
    SYNOPSIS
         tiffmedian [ options ] input.tif output.tif
    
    DESCRIPTION
         tiffmedian applys the median cut algorithm to an  RGB  image
         in  input.tif to generate a palette image that is written to
         output.tif.  The generated colormap  has,  by  default,  256
         entries.   The image data is quantized by mapping each pixel
         to the closest color values in the colormap.
    
    OPTIONS
         -c   Specify the compression to use for data written to  the
              output  file:   none  for  no compression, packbits for
              PackBits  compression,  lzw  for  Lempel-Ziv  &   Welch
              compression,  and  zip  for  Deflate  compression.   By
              default tiffmedian will compress data according to  the
              value of the Compression tag found in the source file.
    
              LZW compression can be specified together with a  pred-
              ictor  value.  A predictor value of 2 causes each scan-
              line of the output image  to  undergo  horizontal  dif-
              ferencing  before  it  is  encoded; a value of 1 forces
              each  scanline  to  be  encoded  without  differencing.
              LZW-specific  options  are  specified  by  appending  a
              ``:''-separated list to the ``lzw''  option;  e.g.   -c
              lzw:2 for LZW compression with horizontal differencing.
    
         -C   Specify the number of entries to use in  the  generated
              colormap.  By default all 256 entries/colors are used.
    
         -f   Apply  Floyd-Steinberg  dithering  before  selecting  a
              colormap entry.
    
         -r   Specify the number of rows (scanlines) in each strip of
              data  written  to  the  output file.  By default, tiff-
              median attempts to set the rows/strip that no more than
              8 kilobytes of data appear in a strip.
    
    NOTES
         This program is derived from Paul Heckbert's median program.
    
    SEE ALSO
         pal2rgb(1), tiffinfo(1), tiffcp(1), tiffcmp(1), libtiff(3)
    
         "Color Image Quantization for Frame  Buffer  Display",  Paul
         Heckbert, SIGGRAPH proceedings, 1982, pp. 297-307.
    
    
    


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