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NAME
     rgb2ycbcr - convert non-YCbCr TIFF images to  a  YCbCr  TIFF
     image

SYNOPSIS
     rgb2ycbcr [ options ] src1.tif src2.tif ... dst.tif

DESCRIPTION
     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.

OPTIONS
     -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.

SEE ALSO
     tiffinfo(1), tiffcp(1), libtiff(3)

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