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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 trans-
       late different color spaces and photometric interpretation into RGBA, support for alpha blending, and  transla-
       tion 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 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  configu-
       ration  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)