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Pamtopnm User Manual(0)                                Pamtopnm User Manual(0)

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




       Minimum  unique  abbreviation  of option is acceptable.  You may use double hyphens instead of single hyphen to
       denote options.  You may use white space in place of the equals sign to separate an option name from its value.

       This program is part of Netpbm(1).

       pamtopnm  reads a PAM image as input and 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 pro-
       gram that doesn't know whether its input is PAM or PNM but needs to feed it to a program that  only  recognizes

              When  you specify -assume, you tell pamtopnm that you personally vouch for the fact that the tuples con-
              tain 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.

       pbmtopgm(1), pamditherbw(1), pgmtoppm(1), ppmtopgm(1), pam(1), pnm(1), pbm(1), pgm(1), ppm(1)

       pamtopnm was new, along with the PAM format, in Netpbm 9.7 (August 2000).

netpbm documentation            03 August 2000         Pamtopnm User Manual(0)