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OpenSolaris 2009.06 - man page for rgb2ycbcr (opensolaris section 1)

rgb2ycbcr(1)				  User Commands 			     rgb2ycbcr(1)

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

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

DESCRIPTION
       rgb2ycbcr converts RGB color, grayscale, or bi-level TIFF images to YCbCr images by trans-
       forming 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,
       and output data files are compressed with the LZW compression scheme, with each	strip  no
       more  than  8  kilobytes.  These characteristics can be overridden or explicitly specified
       with the options described below.

OPTIONS
       The following options are supported:

       -c	       Specify a compression scheme to use when writing image data:

		       -c jpeg		       Baseline JPEG compression algorithm.

		       -c lzw		       Lempel-Ziv  and	Welch  algorithm.  This  is   the
					       default algorithm.

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

       -h	       Set the horizontal sampling dimension to one of the following: 1, 2, or 4.
		       The default value is 2.

       -r	       Write data with a specified number of rows per strip. By default, the num-
		       ber  of	rows  per strip is selected so that each strip is approximately 8
		       kilobytes.

       -v	       Set the vertical sampling dimension to one of the following: 1, 2,  or  4.
		       The default value is 2.

OPERANDS
       The following operands are supported:

       src.tif	       The name of the input file that contains non-YCbCr TIFF data.

       dest.tif        The name of the output file that contains YCbCr TIFF data.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWTiff			   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

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

NOTES
       Updated by Breda McColgan, Sun Microsystems Inc., 2004.

SunOS 5.11				   26 Mar 2004				     rgb2ycbcr(1)


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