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+ tiff2rgba − convert a TIFF image to +RGBA color space + |
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+ tiff2rgba [ options ] input.tif +output.tif + |
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+ 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. + |
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+ −c + |
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+ 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. + |
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+ −r + |
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+ 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. + |
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+ −b + |
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+ 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. + |
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+ −n + |
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+ 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. + |
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+ tiff2bw(1), TIFFReadRGBAImage(3t), +libtiff(3) + +Libtiff library home page: +http://www.remotesensing.org/libtiff/ + |
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