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 ), 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

netpbm documentation                            05 December 2018                         Bmptopnm User Manual(1)