rgb2ycbcr(1) User Commands rgb2ycbcr(1)NAMErgb2ycbcr - convert non-YCbCr TIFF images to YCbCr TIFF images
SYNOPSISrgb2ycbcr [options] src1.tif [src2.tif...] dest.tif
DESCRIPTIONrgb2ycbcr converts RGB color, grayscale, 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, 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 algo‐
rithm.
-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 number of rows per strip is selected so
that each strip is approximately 8 kilobytes.
-v Set the vertical sampling dimension to one of the fol‐
lowing: 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 │image/library/libtiff │
├─────────────────────────────┼─────────────────────────────┤
│Interface stability │Uncommitted │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOtiffinfo(1), tiffcp(1), libtiff(3)NOTES
Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.11 26 Mar 2004 rgb2ycbcr(1)