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+.\" $Id: tiff2rgba.1,v 1.4 2006/04/20 12:17:19 dron Exp $
+.\"
+.\" Copyright (c) 1988-1997 Sam Leffler
+.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
+.\"
+.\" Permission to use, copy, modify, distribute, and sell this software and 
+.\" its documentation for any purpose is hereby granted without fee, provided
+.\" that (i) the above copyright notices and this permission notice appear in
+.\" all copies of the software and related documentation, and (ii) the names of
+.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
+.\" publicity relating to the software without the specific, prior written
+.\" permission of Sam Leffler and Silicon Graphics.
+.\" 
+.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
+.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
+.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
+.\" 
+.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
+.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
+.\" OF THIS SOFTWARE.
+.\"
+.if n .po 0
+.TH TIFF2RGBA 1 "November 2, 2005" "libtiff"
+.SH NAME
+tiff2rgba \- convert a 
+.SM TIFF
+image to RGBA color space
+.SH SYNOPSIS
+.B tiff2rgba
+[
+.I options
+]
+.I input.tif
+.I output.tif
+.SH DESCRIPTION
+.I Tiff2rgba
+converts a wide variety of TIFF images into an RGBA TIFF image.  This 
+includes the ability to translate different color spaces and photometric
+interpretation into RGBA, support for alpha blending, and translation
+of many different bit depths into a 32bit RGBA image.
+.P
+Internally this program is implemented using the
+.I TIFFReadRGBAImage()
+function, and it suffers any limitations of that image.  This includes
+limited support for > 8 BitsPerSample images, and flaws with some
+esoteric combinations of BitsPerSample, photometric interpretation, 
+block organization and planar configuration.  
+.P
+The generated images are stripped images with four samples per pixel 
+(red, green, blue and alpha) or if the
+.B \-n
+flag is used, three samples
+per pixel (red, green, and blue).  The resulting images are always planar
+configuration contiguous.  For this reason, this program is a useful utility
+for transform exotic TIFF files into a form ingestible by almost any TIFF
+supporting software. 
+.SH OPTIONS
+.TP
+.B \-c
+Specify a compression scheme to use when writing image data:
+.B "\-c none"
+for no compression (the default),
+.B "\-c packbits"
+for the PackBits compression algorithm,
+.B "\-c zip"
+for the Deflate compression algorithm,
+.B "\-c jpeg"
+for the JPEG compression algorithm,
+and
+.B "\-c lzw"
+for Lempel-Ziv & Welch.
+.TP
+.B \-r
+Write data with a specified number of rows per strip;
+by default the number of rows/strip is selected so that each strip
+is approximately 8 kilobytes.
+.TP
+.B \-b
+Process the image one block (strip/tile) at a time instead of by reading
+the whole image into memory at once.  This may be necessary for very large
+images on systems with limited RAM.
+.TP
+.B \-n
+Drop the alpha component from the output file, producing a pure RGB file.
+Currently this does not work if the
+.B \-b
+flag is also in effect.
+.SH "SEE ALSO"
+.BR tiff2bw (1),
+.BR TIFFReadRGBAImage (3t),
+.BR libtiff (3)
+.PP
+Libtiff library home page:
+.BR http://www.remotesensing.org/libtiff/