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rgb2ycbcr ()
  • >> rgb2ycbcr (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • rgb2ycbcr (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
         rgb2ycbcr - convert non-YCbCr TIFF images to  a  YCbCr  TIFF
         rgb2ycbcr [ options ] src1.tif src2.tif ... dst.tif
         rgb2ycbcr converts RGB color, greyscale,  or  bi-level  TIFF
         images  to  YCbCr  images by transforming and sampling pixel
         data.  If multiple files are specified on the  command  line
         each source file is converted to a separate directory in the
         destination file.
         By default, chrominance samples are created by sampling 2 by
         2  blocks  of luminance values; this can be changed with the
         -h and -v options.  Output data are compressed with the  LZW
         compression  scheme,  by default; an alternate scheme can be
         selected with the -c option.  By default,  output  data  are
         compressed  in  strips with the number of rows in each strip
         selected so that the size of a strip is never  more  than  8
         kilobytes;  the  -r option can be used to explicitly set the
         number of rows per strip.
         -c   Specify a compression scheme to use when writing  image
              data:   -c none for no compression, -c packbits for the
              PackBits compression algorithm, -c jpeg  for  the  JPEG
              compression  algorithm,  and  -c  lzw  for Lempel-Ziv &
              Welch (the default).
         -h   Set the horizontal sampling dimension to one of:  1,  2
              (default), or 4.
         -r   Write data with a specified number of rows  per  strip;
              by default the number of rows/strip is selected so that
              each strip is approximately 8 kilobytes.
         -v   Set the vertical sampling dimension to  one  of:  1,  2
              (default), or 4.
         tiffinfo(1), tiffcp(1), libtiff(3)

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