rgb2ycbcr - convert non-YCbCr TIFF images to YCbCr TIFF images
rgb2ycbcr [options] src1.tif [src2.tif...] dest.tif
rgb2ycbcr 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.
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 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 following: 1, 2, or 4. The default value is 2.
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.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE ATTRIBUTE VALUE Availability SUNWTiff Interface stability Evolving
tiffinfo(1), tiffcp(1), libtiff(3)
Updated by Breda McColgan, Sun Microsystems Inc., 2004.
|SunOS 5.11||rgb2ycbcr (1)||26 Mar 2004|