TIFF2RGBA(1) User Commands TIFF2RGBA(1)

NAME

tiff2rgba - convert a TIFF image to RGBA color space

SYNOPSIS

tiff2rgba [ options ] input.tif output.tif

DESCRIPTION

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.

Internally this program is implemented using the 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.

The generated images are stripped images with four samples per pixel
(red, green, blue and alpha) or if the -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.

OPTIONS

-c Specify a compression scheme to use when writing image data:
-c none for no compression (the default), -c packbits for the
PackBits compression algorithm, -c zip for the Deflate
compression algorithm, -c jpeg for the JPEG compression
algorithm, and -c lzw for Lempel-Ziv & Welch.

-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.

-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.

-n Drop the alpha component from the output file, producing a
pure RGB file. Currently this does not work if the -b flag is
also in effect.

-M size
Set maximum memory allocation size (in MiB). The default is
256MiB. Set to 0 to disable the limit.

SEE ALSO

tiff2bw(1), TIFFReadRGBAImage(3t), libtiff(3)

Libtiff library home page: http://www.simplesystems.org/libtiff/

libtiff November 2, 2005 TIFF2RGBA(1)