Options that affect the interpretation of input data are:
-C This option overrides the default behavior of pal2rgb in determining whether or not colormap
entries contain 16-bit or 8-bit values. By default the colormap is inspected and if no colormap
entry greater than 255 is found, the colormap is assumed to have only 8-bit values; otherwise
16-bit values (as required by the TIFF specification) are assumed. The -C option can be used to
explicitly specify the number of bits for colormap entries: -C8 for 8-bit values, -C16 for
16-bit values.
Options that affect the output file format are:
-p Explicitly select the planar configuration used in organizing data samples in the output image: -pcontig for samples packed contiguously, and -pseparate for samples stored separately. By default
samples are packed.
-c Use the specific compression algorithm to encoded image data in the output file: -cpackbits for
Macintosh Packbits, -clzw for Lempel-Ziv & Welch, -czip for Deflate, -cnone for no compression.
If no compression-related option is specified, the input file's compression algorithm is used.
-r Explicitly specify the number of rows in each strip of the output file. If the -r option is not
specified, a number is selected such that each output strip has approximately 8 kilobytes of data
in it.