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TIFF2BW(1) LibTIFF TIFF2BW(1) NAME tiff2bw - convert a color TIFF image to greyscale SYNOPSIS tiff2bw [ options ] input.tif output.tif DESCRIPTION tiff2bw converts an RGB or Palette color TIFF image to a greyscale image by combining percentages of the red, green, and blue channels. By default, output samples are created by taking 28% of the red channel, 59% of the green channel, and 11% of the blue channel. To alter these percentages, the -R, -G, and -B options may be used. OPTIONS -c compress Specify a compression scheme to use when writing image data: -c none for no compression, -c packbits for the PackBits compression algo- rithm, -c zip for the Deflate compression algorithm, -c g3 for the CCITT Group 3 compression algorithm, -c g4 for the CCITT Group 4 compression algorithm, -c lzw for Lempel-Ziv & Welch (the default). -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. -R redperc Specify the percentage of the red channel to use (default 28). -G greenperc Specify the percentage of the green channel to use (default 59). -B blueperc Specify the percentage of the blue channel to use (default 11). SEE ALSO pal2rgb (1), tiffinfo (1), tiffcp (1), tiffmedian (1), libtiff (3tiff), AUTHOR LibTIFF contributors COPYRIGHT 1988-2025, LibTIFF contributors 4.7 Sep 11, 2025 TIFF2BW(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | COPYRIGHT
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