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tiff2bw(1)			 User Commands			    tiff2bw(1)

NAME
       tiff2bw - convert a color TIFF image to grayscale

SYNOPSIS
       tiff2bw [options] input.tif output.tif

DESCRIPTION
       tiff2bw	converts  an  RGB  or  palette color TIFF image to a grayscale
       image by combining percentages of the red, green, and blue channels. By
       default,	 output	 samples are created by taking 28% of the red channel,
       59% of the green channel, and 11% of the blue channel. To  alter	 these
       percentages, use the -R. -G, and -B options.

OPTIONS
       The following options are supported:

       -B	       Specify	the percentage of the blue channel to use. The
		       default value is 11.

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

		       -c g3		       CCITT Group 3 compression algo‐
					       rithm.

		       -c g4		       CCITT Group 4 compression algo‐
					       rithm.

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

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

		       -c zip		       Deflate compression algorithm.

       -G	       Specify the percentage of the green channel to use. The
		       default value is 59.

       -R	       Specify	the  percentage of the red channel to use. The
		       default value is 28.

       -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.

OPERANDS
       The following operands are supported:

       input.tif       The name of the input TIFF file.

       output.tif      The name of the output file.

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

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │image/library/libtiff	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface stability	     │Uncommitted		   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

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

SunOS 5.11			  26 Mar 2004			    tiff2bw(1)

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