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Updated: Wednesday, July 27, 2022

tiff2rgba (1)


tiff2rgba - convert a TIFF image to RGBA color space


tiff2rgba [ options ] input.tif output.tif


TIFF2RGBA(1)                General Commands Manual               TIFF2RGBA(1)

       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 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  eso-
       teric  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 pla-
       nar  configuration contiguous.  For this reason, this program is a use-
       ful 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 compression (the default), -c packbits for the Pack-
              Bits  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 neces-
              sary 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.

       -M size
              Set  maximum  memory  allocation  size  (in MiB). The default is
              256MiB.  Set to 0 to disable the limit.

       See attributes(7) for descriptions of the following attributes:

       |Availability   | image/library/libtiff |
       |Stability      | Volatile              |

       tiff2bw(1), TIFFReadRGBAImage(3t), libtiff(3)

       Libtiff library home page: http://www.simplesystems.org/libtiff/

       Source code for open source software components in Oracle  Solaris  can
       be found at https://www.oracle.com/downloads/opensource/solaris-source-

       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source        was         downloaded         from          http://down-

       Further information about this software can be found on the open source
       community website at http://www.simplesystems.org/libtiff/.

libtiff                        November 2, 2005                   TIFF2RGBA(1)