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Pamseq User Manual(0)                                    Pamseq User Manual(0)

       pamseq - generate PAM image of all possible tuple values, in sequence

       pamseq [-tupletype=tupletype] depth maxval

       All options can be abbreviated to their shortest unique prefix.  You may use two hyphens instead of one to des-
       ignate an option.  You may use either white space or an equals sign between an option name and its value.

       This program is part of Netpbm(1).

       pamseq generates a PAM image of a specified depth and specified maxval that consists of a single row.  The  row
       consists of one tuple of every possible value, in order.

       For  a  depth  of one, the order is simple: From 0 to maxval, going from left to right.  For higher depths, the
       highest numbered plane goes from 0 to maxval (going left to right) while all the other  planes  have  value  0.
       Then the sequence repeats except with the next highest plane set to a value of 1, then 2, etc.

              This  is  the  value of the "tuple_type" attribute of the created PAM image.  It can be any string up to
              255 characters.

       To create a simple ramp of the values 0..255, for input to various matrix calculations, try

         pamseq 1 255
       (Before pamseq existed, pgmramp was often pressed into service for this).

       To create a PPM color map of all the possible colors representable with a maxval of 5, do

         pamseq 3 5 -tupletype=RGB | pamtopnm

       Again, with a modern program based on the Netpbm library, you don't need the pamtopnm because a PAM  RGB  image
       is equivalent to a PPM image.

       You  can use such a color map with pnmremap(1)toquantizethecolorsinan image.  With the maxval of 5 given in the
       example, you get a color map of the set of "web safe" colors as defined by Netscape.  Most web browsers guaran-
       tee that they can produce at least these 216 colors (215 plus black).

       pnmremap(1), pamtopnm(1), pam(1)

       pamseq was added to Netpbm in June 2002.

netpbm documentation              8 May 2002             Pamseq User Manual(0)