tiff2rgba
convert a TIFF image to RGBA color space
see also :
tiff2bw
Synopsis
tiff2rgba
[ options ] input.tif output.tif
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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 ,
TIFFReadRGBAImage(3t), libtiff
Libtiff library
home page: http://www.remotesensing.org/libtiff/