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RGB2YCBCR(1) LibTIFF RGB2YCBCR(1) NAME rgb2ycbcr - convert non-YCbCr TIFF images to a YCbCr TIFF image SYNOPSIS rgb2ycbcr [ options ] src1.tif src2.tif ^a| 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 spec- ified on the command line each source file is converted to a separate di- rectory 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 se- lected 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 algo- rithm (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 Sep 11, 2025 RGB2YCBCR(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | COPYRIGHT
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