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.
SEE ALSO
tiff2bw(1),
(3t),
(3)
Libtiff library home page: