TIFF2RGBA(1)TIFF2RGBA(1)NAMEtiff2rgba - convert a TIFF image to RGBA color space
SYNOPSIStiff2rgba [ 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 TIFFRead_
RGBAImage() function, and it suffers any limitations of
that image. This includes limited support for > 8
BitsPerSample images, and flaws with some esoteric combi
nations 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 con
tiguous. For this reason, this program is a useful util
ity for transform exotic TIFF files into a form ingestable
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 algo
rithm, -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, pro
ducing a pure RGB file. Currently this does not
work if the -b flag is also in effect.
SEE ALSOtiff2bw(1), TIFFReadRGBAImage(3t), libtiff(3)
June 13, 2001 TIFF2RGBA(1)
