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tiffmedian(1) [sunos man page]

tiffmedian(1)							   User Commands						     tiffmedian(1)

NAME

       tiffmedian - apply the median cut algorithm to data in a TIFF file

SYNOPSIS

       tiffmedian [options] input.tif output.tif

DESCRIPTION

       tiffmedian  applies  the median cut algorithm to an RGB image in input.tif, to generate a palette image that is written to output.tif.  The
       generated colormap has, by default, 256 entries. The image data is quantized by mapping each pixel to the closest color values in the  col-
       ormap.

OPTIONS

       The following options are supported:

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

		       -c lzw		       Lempel-Ziv and Welch algorithm.

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

		       -c zip		       Deflate compression algorithm.

		       If no compression-related option is specified, the input-file compression algorithm is used.

       -C	       Specify the number of entries to use in the generated colormap. By default, all 256 entries or colors are used.

       -f	       Apply Floyd-Steinberg dithering before selecting a colormap entry.

       -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.

EXTENDED DESCRIPTION

       LZW compression can be specified together with a predictor value. A predictor value of 2 causes	each  scanline	of  the  output  image	to
       undergo horizontal differencing before being encoded. A predictor value of 1 forces each scanline to be encoded without differencing.

       LZW-specific options are specified by appending a colon-separated list to the lzw option. For example, specify -c lzw:2 for LZW compression
       with horizontal differencing.

ATTRIBUTES

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

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

SEE ALSO

       Color Image Quantization for Frame Buffer Display, Paul Heckbert, SIGGRAPH proceedings, 1982, pp. 297-307.

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

NOTES

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

SunOS 5.10							    26 Mar 2004 						     tiffmedian(1)

Check Out this Related Man Page

pal2rgb(1)							   User Commands							pal2rgb(1)

NAME

       pal2rgb - convert a palette color TIFF image to a full color image

SYNOPSIS

       pal2rgb [options] input.tif output.tif

DESCRIPTION

       pal2rgb	converts a palette color TIFF image to a full color image by applying the colormap of the palette image to each sample to generate
       a full color RGB image.

OPTIONS

   Input Data Options
       The following input data options are supported:

       -C	       Override the default behavior of pal2rgb to determine whether or not colormap entries contain 16-bit or	8-bit  values.	By
		       default, the colormap is inspected and if no colormap entry greater than 255 is found, the colormap is assumed to have only
		       8-bit values. Otherwise, 16-bit values, as required by the TIFF specification, are assumed. The -C option can  be  used	to
		       explicitly specify the number of bits for colormap entries: -C 8 for 8-bit values, -C 16 for 16-bit values.

   Output File Options
       The following output file options are supported:

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

		       -c lzw		       Lempel-Ziv and Welch algorithm.

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

		       -c zip		       Deflate compression algorithm.

		       If no compression-related option is specified, the input-file compression algorithm is used.

       -p	       Explicitly select the planar configuration used to organize data samples in the output image:

		       -p contig	       Samples are packed contiguously. This is the default.

		       -p separate	       Samples are stored separately.

       -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

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

NOTES

       Only 8-bit images are supported.

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

SunOS 5.10							    26 Mar 2004 							pal2rgb(1)
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