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 image.
Internally this program is implemented using the
function, and it suffers any limitations of that function. 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
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 striprows¶
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.
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.
Drop the alpha component from the output file, producing a pure RGB file. Currently this does not work if the
-bflag is also in effect.
- -M size¶
Set maximum memory allocation size (in MiB). The default is 256MiB. Set to 0 to disable the limit.