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 designate an option.  You may use
       either  white  space  or  an equals sign between an option name and its


       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

       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 guarantee 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)

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