# man > ilbmtoppm(1)

> **TLDR:** Convert an ILBM file to a PPM image.
>
- Convert an ILBM file to a PPM image:
  `ilbmtoppm {{path/to/file.ilbm}} > {{path/to/file.ppm}}`
- Use the specified color to "show through" where the image is transparent:
  `ilbmtoppm {{-t|-transparent}} {{color}} {{path/to/file.ilbm}} > {{path/to/file.ppm}}`
- Ignore the chunk with the specified chunk ID:
  `ilbmtoppm {{-ig|-ignore}} {{chunk_id}} {{path/to/file.ilbm}} > {{path/to/file.ppm}}`
- Store the input's transparency information to the specified PBM file:
  `ilbmtoppm {{-m|-maskfile}} {{path/to/maskfile.pbm}} {{path/to/file.ilbm}} > {{path/to/file.ppm}}`

*Source: tldr-pages*

---

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

## NAME
       ilbmtoppm - convert an ILBM file into a PPM image


## SYNOPSIS
       **ilbmtoppm **[**-ignore**<chunkID>**] **[ **-isham **| **-isnotham **| **-isehb **| **-isnotehb **| **-isdeep **| **-isnotdeep**
       ] [**-cmaponly**] [**-adjustcolors**] [**-transparent _**color_] [**-maskfile _**filename_ [**-verbose**] [_ILBMfile_]



## DESCRIPTION
       This program is part of [**Netpbm**(1)](https://www.chedong.com/phpMan.php/man/Netpbm/1/markdown).

       **ilbmtoppm  **reads an IFF ILBM file as input and produces a PPM image as output.  **ilbmtoppm **can
       handle the following ILBM types:



       •      Normal ILBMs with 1-16 planes.

       •      Amiga Extra_Halfbrite (EHB)

       •      Amiga HAM with 3-16 planes.

       •      24 bit.

       •      Multiplatte (normal or HAM) pictures.

       •      Color map (BMHD + CMAP chunk only, nPlanes = 0).

       •      Unofficial direct color.  1-16 planes for each color component.


       **ilbmtoppm **uses these ILBM chunks: BMHD, CMAP, CAMG (only HAM & EHB flags  used),  PCHG,  BODY
       unofficial  DCOL  chunk  to identify direct color ILBM.  It ignores these chunks: GRAB, DEST,
       SPRT, CRNG, CCRT, CLUT, DPPV, DRNG, EPSF.  It ignores, but displays in verbose  mode,  these:
       NAME, AUTH, (c), ANNO, DPI.  It skips chunks whose type it doesn't recognize.


## OPTIONS
       In  addition  to  the options common to all programs based on libnetpbm (most notably **-quiet**,
       see ]8;;index.html#commonoptions\ Common Options]8;;\ ), **ilbmtoppm **recognizes the following command line options:




### -transparent _
              This is the color that should "show through" in places where the image is transparent.

              _color_ is like the ]8;;libnetpbm_image.html#colorname\argument of the **pnm_parsecolor() **library routine]8;;\ .


### -verbose
              Give some information about the ILBM file.


### -ignore _
              Skip a chunk.  _chunkID_ is the 4-letter  IFF  chunk  identifier  of  the  chunk  to  be
              skipped.


### -isham  -isehb
              Treat  the input file as a HAM or Extra_Halfbrite picture, even if these flags are not
              set in the CAMG chunk (or if there is no CAMG chunk).


### -maskfile _
              This names a file for **ilbmtoppm **to create with the  image's  transparency  mask.   The
              mask  file is a PBM image which maps to the input image with white pixels representing
              transparent pixels in the image and black pixels representing opaque pixels.

              If you don't specify this, or the image does  not  contain  transparency  information,
              **ilbmtoppm **does not create a mask file.


### -cmaponly
              With this option, **ilbmtoppm **generates a PPM of the ILBM's _color_ _map_, not the image it‐
              self.

              **ilbmtoppm  **does  the same thing even without **-cmaponly **if the ILBM is a pure color map
              stream (it has a bitmap header with an _nplanes_ value of zero or has no BODY chunk.


### -adjustcolors
              If all colors in the CMAP have a value of less then 16, ilbmtoppm assumes a 4-bit col‐
              ormap and gives a warning.  With this option the colormap is scaled to 8 bits.





## LIMITATIONS
       The multipalette PCHG BigLineChanges and Huffman decompression code is untested.


## REFERENCES
       Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)  Addison Wesley, ISBN 0-201-56775-X


## SEE ALSO
       [**ppmtoilbm**(1)](https://www.chedong.com/phpMan.php/man/ppmtoilbm/1/markdown), [**ppm**(1)](https://www.chedong.com/phpMan.php/man/ppm/1/markdown)


## AUTHORS
       Copyright (C) 1989 by Jef Poskanzer.

       Modified October 1993 by Ingo Wilken (<_Ingo.Wilken@informatik.uni-oldenburg.de_>)

## DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from  HTML  source.   The  master
       documentation is at

              **<http://netpbm.sourceforge.net/doc/ilbmtoppm.html>**

netpbm documentation                      12 November 2014                  _Ilbmtoppm_ _User_ [_Manual_(1)](https://www.chedong.com/phpMan.php/man/Manual/1/markdown)