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)