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- rawtopgm(1) AMIGA (15 June 1993) rawtopgm(1)
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- NAME
- rawtopgm - convert raw grayscale bytes into a portable
- graymap
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- SYNOPSIS
- rawtopgm [-headerskip N] [-rowskip N] [-tb|-topbottom]
- [width height] [imagedata]
-
- DESCRIPTION
- Reads raw grayscale bytes as input. Produces a portable
- graymap as output. The input file is just grayscale bytes.
- If you don't specify the width and height on the command
- line, the program will check the size of the image and try
- to make a quadratic image of it. It is an error to supply a
- non quadratic image without specifying width and height.
- The maxval is assumed to be 255.
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- OPTIONS
- -headerskip
- If the file has a header, you can use this flag to skip
- over it.
-
- -rowskip
- If there is padding at the ends of the rows, you can
- skip it with this flag. Note that rowskip can be a
- real number. Amazingly, I once had an image with 0.376
- bytes of padding per row. This turned out to be due to
- a file-transfer problem, but I was still able to read
- the image.
-
- -tb -topbottom
- Flips the image upside down. The first pixel in a pgm
- file is in the lower left corner of the image. For
- conversion from images with the first pixel in the
- upper left corner (e.g. the Molecular Dynamics and
- Leica confocal formats) this flips the image right.
- This is equivalent to rawtopgm [file] | pnmflip -tb .
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- BUGS
- If you don't specify the image width and height, the program
- will try to read the entire image to a memory buffer. If you
- get a message that states that you are out of memory, try to
- specify the width and height on the command line. Also, the
- -tb option consumes much memory.
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- SEE ALSO
- pgm(5), rawtoppm(1), pnmflip(1)
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- AUTHORS
- Copyright (C) 1989 by Jef Poskanzer.
- Modified June 1993 by Oliver Trepte, oliver@fysik4.kth.se
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- Page 1 (printed 12/9/93)
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