tiff2rgba - convert a TIFF image to RGBA color space
tiff2rgba [ options ] input.tif output.tif
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
Internally this program is implemented using the TIFFReadRGBAImage() function, and it suf-
fers any limitations of that image. This includes limited support for > 8 BitsPerSample
images, and flaws with some esoteric combinations of BitsPerSample, photometric interpre-
tation, 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 pro-
gram is a useful utility for transform exotic TIFF files into a form ingestible by almost
any TIFF supporting software.
-c Specify a compression scheme to use when writing image data: -c none for no com-
pression (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. Cur-
rently this does not work if the -b flag is also in effect.
tiff2bw(1), TIFFReadRGBAImage(3t), libtiff(3)
Libtiff library home page: http://www.remotesensing.org/libtiff/
libtiff November 2, 2005 TIFF2RGBA(1)