redhat man page for pamtopnm

pamtopnm(1)						      General Commands Manual						       pamtopnm(1)

NAME
       pamtopnm - convert PAM image to PBM, PGM, or PPM

SYNOPSIS
       pamtopnm [-assume] [pnmfile]

       All options may be abbreviated to the shortest unique prefix.

DESCRIPTION
       Reads a PAM image as input.  Produces an equivalent PBM, PGM, or PPM (i.e. PNM) image, whichever is most appropriate, as output.

       pamtopnm  assumes  the  PAM  image  represents  the information required for a PBM, PGM, or PPM image if its tuple type is "BLACKANDWHITE",
       "GRAYSCALE", or "RGB" and its depth and maxval are appropriate.	If this is not the case, pamtopnm fails.

       However, you can override the tuple type requirement with the -assume option.

       As with any Netpbm program that reads PAM images, pamtopnm also reads PNM images as if they were PAM.  In that case,  pamtopnm's  functions
       reduces	to  simply copying the input to the output.  But this can be useful in a program that doesn't know whether its input is PAM or PNM
       but needs to feed it to a program that only recognizes PNM.

OPTIONS
       -assume
	      When you specify -assume, you tell pamtopnm that you personally vouch for the fact that the tuples contain the same data as  belongs
	      in  the  channels of a PBM, PGM, or PPM file.  The depth must still conform, though, so to truly force a conversion, you may have to
	      run the input through pamchannel first.  But be careful with -assume.  When you -assume, you make an -ass of u and me.

SEE ALSO
       pbmtopgm(1), pgmtopbm(1), pgmtoppm(1), ppmtopgm(1), pam(5), pnm(5), pbm(5), pgm(5), ppm(5)

								  03 August 2000						       pamtopnm(1)