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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 photomet- ric 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() func- tion, and it suffers any limitations of that function. This includes lim- ited support for > 8 BitsPerSample images, and flaws with some esoteric combinations of BitsPerSample, photometric interpretation, block organiza- tion 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 configura- tion contiguous. For this reason, this program is a useful utility for transform exotic TIFF files into a form ingestible by almost any TIFF sup- porting 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 com- pression 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 ef- fect. -B Use this value as the background when doing alpha compositing (drop- ping the alpha component). -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 (3tiff), libtiff (3tiff), AUTHOR LibTIFF contributors COPYRIGHT 1988-2025, LibTIFF contributors 4.7 Sep 11, 2025 TIFF2RGBA(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | COPYRIGHT
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