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tiff2rgba(1)                         LibTIFF                        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 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 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 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.

       -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.

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


SEE ALSO

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


AUTHOR

       LibTIFF contributors


COPYRIGHT

       1988-2022, LibTIFF contributors



4.5                             December 23, 2022                   tiff2rgba(1)

tiff 4.5.0 - Generated Sat Dec 24 11:42:39 CST 2022
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