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- .\"
- .\" 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.
- .TP
- .BI \-M " size"
- Set maximum memory allocation size (in MiB). The default is 256MiB.
- Set to 0 to disable the limit.
- .SH "SEE ALSO"
- .BR tiff2bw (1),
- .BR TIFFReadRGBAImage (3t),
- .BR libtiff (3)
- .PP
- Libtiff library home page:
- .BR http://www.simplesystems.org/libtiff/
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