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- pnmtoddif(1) AMIGA pnmtoddif(1)
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- Name
- pnmtoddif - Convert a portable anymap to DDIF format
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- Syntax
- pnmtoddif pnmtoddif [-resolution x y] [pnmfile [ddiffile]]
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- OPTIONS
- resolution x y The horizontal and vertical resolution of the
- output image in dots per inch. Defaults to 78
- dpi.
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- pnmfile The filename for the image file in pnm
- format. If this argument is omitted, input
- is read from stdin.
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- ddiffile The filename for the image file to be created
- in DDIF format. If this argument is omitted,
- the ddiffile is written to standard output.
- It can only specified if a pnmfile is also
- specified.
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- DESCRIPTION
- pnmtoddif takes a portable anymap from standard input and
- converts it into a DDIF image file on standard output or the
- specified DDIF file.
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- pbm format (bitmap) data is written as 1 bit DDIF, pgm
- format data (greyscale) as 8 bit greyscale DDIF, and ppm
- format data is written as 8,8,8 bit color DDIF. All DDIF
- image files are written as uncompressed. The data plane
- organization is interleaved by pixel.
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- In addition to the number of pixels in the width and height
- dimension, DDIF images also carry information about the size
- that the image should have, that is, the physical space that
- a pixel occupies. PBMPLUS images do not carry this
- information, hence it has to be externally supplied. The
- default of 78 dpi has the beneficial property of not causing
- a resize on most Digital Equipment Corporation color
- monitors.
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- AUTHOR
- Burkhard Neidecker-Lutz
- Digital Equipment Corporation, CEC Karlsruhe
- neideck@nestvx.enet.dec.com
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- Page 1 (printed 3/1/94)
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