1Bmptopnm User Manual(0) Bmptopnm User Manual(0)
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6 bmptopnm - convert a BMP file into a PBM, PGM, or PNM image
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10 bmptopnm
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12 [-verbose]
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14 [bmpfile]
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18 This program is part of Netpbm(1).
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20 bmptopnm reads a Microsoft Windows or OS/2 BMP file as input. and pro‐
21 duces a PBM, PGM, or PNM image as output. If the input is colormapped
22 and contains only black and white, the output is PBM. If the input is
23 colormapped and contains only black white and gray, the output is PGM.
24 Otherwise, the output is PPM.
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26 bmptopnm understands BMP files compressed with run length encoding
27 (RLE4/RLE8), but not if that encoding includes a "delta" (which is
28 rare). bmptopnm recognizes the delta and issues an error message.
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30 Before Netpbm 10.75 (June 2016), bmptopnm could not convert Version 4
31 or Version 5 Windows BMP images.
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33 bmptopnm cannot convert BMP files compressed with JPEG or PNG encoding.
34 It recognizes the compression and issues an error message. Before
35 Netpbm 10.32 (February 2006), bmptopnm couldn't convert RLE8 BMP files
36 either, and before Netpbm 10.85 (December 2018), it couldn't convert
37 RLE4 (between 10.32 and 10.85, it would act like it recognized the for‐
38 mat, but produce garbage output).
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40 Before Netpbm 10.18 (September 2003), this program could not convert
41 BMP images with the BI_BITFIELDS format ("compression type"). It would
42 recognize the format and issue an error message.
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44 bmptopnm cannot convert OS/2 BMP files with 16 bits per pixel (only
45 because the author did not have a complete specification for them). It
46 recognizes the format and issues an error message. Before Netpbm 10.16
47 (June 2003), it also could not convert Windows BMP files with 16 bits
48 per pixel.
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53 In addition to the options common to all programs based on libnetpbm
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55 Common Options ⟨index.html#commonoptions⟩ ), bmptopnm recognizes the
56 following command line option:
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61 -verbose
62 Report contents of the BMP header to the standard error.
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68 ppmtobmp(1), ppmtowinicon(1), ppm(1)
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72 Copyright (C) 1992 by David W. Sanderson.
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75 This manual page was generated by the Netpbm tool 'makeman' from HTML
76 source. The master documentation is at
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78 http://netpbm.sourceforge.net/doc/bmptopnm.html
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80netpbm documentation 05 December 2018 Bmptopnm User Manual(0)