Convert a PAM image to a TIFF file. More information: https://netpbm.sourceforge.net/doc/pamtotiff.html.
pamtotiff path/to/input_file.pam > path/to/output_file.tiff
pamtotiff -none|packbits|lzw|g3|g4|flate|adobeflate path/to/input_file.pam > path/to/output_file.tiff
pamtotiff -color path/to/input_file.pam > path/to/output_file.tiff