Bmptopnm User Manual(1) General Commands Manual Bmptopnm User Manual(1)
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 pro-
duces 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 for-
mat, 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 be-
cause 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
netpbm documentation 05 December 2018 Bmptopnm User Manual(1)
Generated by dwww version 1.15 on Sat Jun 29 02:35:31 CEST 2024.