# man > pamstack(1)

> **TLDR:** Stack the planes of multiple PAM images into one PAM image.
>
- Stack the planes of the specified PAM images in the specified order:
  `pamstack {{path/to/image1.pam path/to/image2.pam ...}} > {{path/to/output.pam}}`
- Specify the tuple type name of the output PAM file (maximum of 255 characters):
  `pamstack {{-t|-tupletype}} {{tuple_type}} {{path/to/image1.pam path/to/image2.pam ...}} > {{path/to/output.pam}}`

*Source: tldr-pages*

---

[pamstack(1)](https://www.chedong.com/phpMan.php/man/pamstack/1/markdown)                            General Commands Manual                           [pamstack(1)](https://www.chedong.com/phpMan.php/man/pamstack/1/markdown)



## NAME
       pamstack - stack planes of multiple PAM images into one PAM image

## SYNOPSIS
       **pamstack** [**-tupletype** _tupletype_] [_inputfilespec_]

       All options may be abbreviated to the shortest unique prefix.


## DESCRIPTION
       Reads  multiple PAM or PNM images as input. Produces a PAM image as output, consisting of all
       the planes (channels) of the inputs, stacked in the order specified.

       The output is the same dimensions as the inputs, except that the depth  is  the  sum  of  the
       depths  of  the inputs. It has the same maxval.  **pamstack** fails if the inputs are not all the
       same width, height, and maxval. The tuple type is a null string unless you specify  the  **-tu**‐‐
       **pletype** option.

       **pamchannel** does the opposite of **pamstack:** It extracts individual planes from a single PAM.

       Use **pamtopnm** to convert a suitable PAM image to a more traditional PNM (PBM, PGM, or PPM) im‐
       age.

       One example of using **pamstack** is that some Netpbm programs accept as input a PAM that  repre‐
       sents  graphic  image with transparency information -- tuple type "RGBA". In Netpbm, such im‐
       ages were traditionally represented as two images - a PPM for the color and  a  PGM  for  the
       transparency.  To convert a PPM/PGM pair into PAM(RGBA) input that newer programs require, do
       something like this:

       pamstack -tupletype=RGBA myimage.ppm myalpha.pgm | pamtouil >myimage.uil


## OPTIONS
### -tupletype
              This specified the tuple type name to be recorded in  the  output.  You  may  use  any
              string  up to 255 characters. Some programs recognize some names. If you omit this op‐
              tion, the default tuple type name is null.


## SEE ALSO
       [**pam**(5)](https://www.chedong.com/phpMan.php/man/pam/5/markdown)


## AUTHOR
       Copyright (C) by Bryan Henderson, San Jose CA 2000.08.05



                                             01 May 2002                                 [pamstack(1)](https://www.chedong.com/phpMan.php/man/pamstack/1/markdown)