mirror of https://github.com/CrimsonTome/tldr.git
33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
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# rawtopgm
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> Convert a raw greyscale image to a PGM image.
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> More information: <https://netpbm.sourceforge.net/doc/rawtopgm.html>.
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- Convert a raw greyscale image to a PGM image:
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`rawtopgm {{width}} {{height}} {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Convert a raw greyscale image to a PGM image, assume the image to be a square:
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`rawtopgm {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Convert a raw greyscale image in which the pixels come bottom-first instead of top-first to a PGM image:
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`rawtopgm {{width}} {{height}} -bottomfirst {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Ignore the first n bytes of the specified file:
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`rawtopgm {{width}} {{height}} -headerskip {{n}} {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Ignore the last m bytes of each row in the specified file:
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`rawtopgm {{width}} {{height}} -rowskip {{m}} {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Specify the maxval for the grey values in the input to be equal to N:
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`rawtopgm {{width}} {{height}} -maxval {{N}} {{path/to/image.raw}} > {{path/to/output.pgm}}`
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- Specify the number of bytes that represent each sample in the input and that the byte-sequence is to be interpreted as little-endian:
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`rawtopgm {{width}} {{height}} -bpp {{1|2}} -littleendian {{path/to/image.raw}} > {{path/to/output.pgm}}`
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