TIFF2RGBA(1)                                                      TIFF2RGBA(1)



NAME
       tiff2rgba - convert a TIFF image to RGBA color space

SYNOPSIS
       tiff2rgba [ 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 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(1), TIFFReadRGBAImage(3t), libtiff(3)

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



libtiff                        November 2, 2005                   TIFF2RGBA(1)
