Grouping and calculation of percentages Post: 302608421

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LEARN ABOUT LINUX

tiff2bw

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 algorithm.

		       -c g4		       CCITT Group 4 compression algorithm.

		       -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		     |SUNWTiff			   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

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

NOTES

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

SunOS 5.10							    26 Mar 2004 							tiff2bw(1)