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rawtopgm — Convert a raw greyscale image to a PGM image. More information: <https://netpbm.sourceforge.net/doc/

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commandrawtopgmgreyscaleconvertcliimagepgmraw

Problem

How to use the rawtopgm command: Convert a raw greyscale image to a PGM image. More information: <https://netpbm.sourceforge.net/doc/rawtopgm.html>.

Solution

rawtopgm — Convert a raw greyscale image to a PGM image. More information: <https://netpbm.sourceforge.net/doc/rawtopgm.html>.

Convert a raw greyscale image to a PGM image:
rawtopgm {{width}} {{height}} {{path/to/image.raw}} > {{path/to/output.pgm}}


Convert a raw greyscale image to a PGM image, assume the image to be a square:
rawtopgm {{path/to/image.raw}} > {{path/to/output.pgm}}


Convert a raw greyscale image in which the pixels come bottom-first instead of top-first to a PGM image:
rawtopgm {{width}} {{height}} {{[-bt|-bottomfirst]}} {{path/to/image.raw}} > {{path/to/output.pgm}}


Ignore the first n bytes of the specified file:
rawtopgm {{width}} {{height}} {{[-h|-headerskip]}} {{n}} {{path/to/image.raw}} > {{path/to/output.pgm}}


Ignore the last m bytes of each row in the specified file:
rawtopgm {{width}} {{height}} {{[-r|-rowskip]}} {{m}} {{path/to/image.raw}} > {{path/to/output.pgm}}


Specify the maxval for the grey values in the input to be equal to n:
rawtopgm {{width}} {{height}} {{[-m|-maxval]}} {{n}} {{path/to/image.raw}} > {{path/to/output.pgm}}


Specify the number of bytes that represent each sample in the input and that the byte-sequence is to be interpreted as little-endian:
rawtopgm {{width}} {{height}} -bpp {{1|2}} {{[-l|-littleendian]}} {{path/to/image.raw}} > {{path/to/output.pgm}}

Code Snippets

Convert a raw greyscale image to a PGM image

rawtopgm {{width}} {{height}} {{path/to/image.raw}} > {{path/to/output.pgm}}

Convert a raw greyscale image to a PGM image, assume the image to be a square

rawtopgm {{path/to/image.raw}} > {{path/to/output.pgm}}

Convert a raw greyscale image in which the pixels come bottom-first instead of top-first to a PGM image

rawtopgm {{width}} {{height}} {{[-bt|-bottomfirst]}} {{path/to/image.raw}} > {{path/to/output.pgm}}

Ignore the first `n` bytes of the specified file

rawtopgm {{width}} {{height}} {{[-h|-headerskip]}} {{n}} {{path/to/image.raw}} > {{path/to/output.pgm}}

Ignore the last m bytes of each row in the specified file

rawtopgm {{width}} {{height}} {{[-r|-rowskip]}} {{m}} {{path/to/image.raw}} > {{path/to/output.pgm}}

Context

tldr-pages: common/rawtopgm

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