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RedHat 9 (Linux i386) - man page for ppm2tiff (redhat section 1)

PPM2TIFF(1)						      General Commands Manual						       PPM2TIFF(1)

ppm2tiff - create a TIFF file from a PPM image file
ppm2tiff [ options ] [ input.ppm ] output.tif
ppm2tiff converts a file in the PPM image format to TIFF. By default, the TIFF image is created with data samples packed (PlanarConfigura- tion=1), compressed with the Lempel-Ziv & Welch algorithm (Compression=5), and with each strip no more than 8 kilobytes. These character- istics can be overriden, or explicitly specified with the options described below If the PPM file contains greyscale data, then the PhotometricInterpretation tag is set to 1 (min-is-black), otherwise it is set to 2 (RGB). If no PPM file is specified on the command line, ppm2tiff will read from the standard input.
-c Specify a compression scheme to use when writing image data: -c none for no compression, -c packbits for the PackBits compression algorithm, -c jpeg for the baseline JPEG compression algorithm, -c zip for the Deflate compression algorithm, and -c lzw for Lempel- Ziv & Welch compression (the default). -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 approxi- mately 8 kilobytes. -R Mark the resultant image to have the specified X and Y resolution (in dots/inch).
tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3) October 15, 1995 PPM2TIFF(1)