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