RGB2YCBCR - Online Linux Manual PageSection : 1
Updated : November 2, 2005
Source : libtiff
NAMErgb2ycbcr − convert non-YCbCr TIFF images to a YCbCr TIFF image
SYNOPSISrgb2ycbcr [ options ] src1.tif src2.tif ... dst.tif"
DESCRIPTIONrgb2ycbcr 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 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 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 ALSOtiffinfo(1), tiffcp(1), libtiff(3) Libtiff library home page: http://www.remotesensing.org/libtiff 0
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