RGB2YCBCR(1) LibTIFF RGB2YCBCR(1)
rgb2ycbcr - convert non-YCbCr TIFF images to a YCbCr TIFF image
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 PackBits 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 compress
Specify a compression scheme to use when writing image data:
-c none for no compression, -c packbits for the PackBits
compression algorithm (the default), -c jpeg for the JPEG
compression algorithm, -c zip for the deflate compression
algorithm, and -c lzw for Lempel-Ziv & Welch.
-h size
Set the horizontal sampling dimension to one of: 1, 2
(default), or 4.
-r striprows
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 size
Set the vertical sampling dimension to one of: 1, 2 (default),
or 4.
tiffinfo (1), tiffcp (1), libtiff (3tiff)
LibTIFF contributors
1988-2025, LibTIFF contributors
4.7 March 7, 2026 RGB2YCBCR(1)
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 PackBits 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 compress
Specify a compression scheme to use when writing image data:
-c none for no compression, -c packbits for the PackBits
compression algorithm (the default), -c jpeg for the JPEG
compression algorithm, -c zip for the deflate compression
algorithm, and -c lzw for Lempel-Ziv & Welch.
-h size
Set the horizontal sampling dimension to one of: 1, 2
(default), or 4.
-r striprows
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 size
Set the vertical sampling dimension to one of: 1, 2 (default),
or 4.
SEE ALSO
tiffinfo (1), tiffcp (1), libtiff (3tiff)
AUTHOR
LibTIFF contributors
COPYRIGHT
1988-2025, LibTIFF contributors
4.7 March 7, 2026 RGB2YCBCR(1)