NAME

       bmptopnm - convert a BMP file into a PBM, PGM, or PNM image

SYNOPSIS

       bmptopnm

       [-verbose]

       [bmpfile]

DESCRIPTION

       This program is part of Netpbm(1).

       bmptopnm reads a Microsoft Windows or OS/2 BMP file as input.  and produces a PBM, PGM, or
       PNM image as output.  If the input is colormapped and contains only black and  white,  the
       output  is  PBM.   If the input is colormapped and contains only black white and gray, the
       output is PGM.  Otherwise, the output is PPM.

       bmptopnm understands BMP files compressed with run length encoding (RLE4/RLE8), but not if
       that  encoding  includes  a  "delta"  (which  is rare).  bmptopnm recognizes the delta and
       issues an error message.

       Before Netpbm 10.75 (June 2016), bmptopnm could not convert Version 4 or Version 5 Windows
       BMP images.

       bmptopnm cannot convert BMP files compressed with JPEG or PNG encoding.  It recognizes the
       compression and issues an error message.  Before Netpbm 10.32  (February  2006),  bmptopnm
       couldn't  convert  RLE8  BMP  files  either,  and  before Netpbm 10.85 (December 2018), it
       couldn't convert RLE4 (between 10.32 and 10.85,  it  would  act  like  it  recognized  the
       format, but produce garbage output).

       Before  Netpbm  10.18 (September 2003), this program could not convert BMP images with the
       BI_BITFIELDS format ("compression type").  It would recognize  the  format  and  issue  an
       error message.

       bmptopnm cannot convert OS/2 BMP files with 16 bits per pixel (only because the author did
       not have a complete specification for them).  It recognizes the format and issues an error
       message.   Before  Netpbm  10.16  (June 2003), it also could not convert Windows BMP files
       with 16 bits per pixel.

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably -quiet,
       see
        Common  Options  ⟨index.html#commonoptions⟩  ), bmptopnm recognizes the following command
       line option:

       -verbose
              Report contents of the BMP header to the standard error.

SEE ALSO

       ppmtobmp(1), ppmtowinicon(1), ppm(1)

AUTHOR

       Copyright (C) 1992 by David W. Sanderson.

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/bmptopnm.html