pnmtoddif



Pnmtoddif User Manual(0)                              Pnmtoddif User Manual(0)




NAME

       pnmtoddif - Convert a PNM image to DDIF format



SYNOPSIS

       pnmtoddif [-resolution x y] [pnmfile [ddiffile]]



DESCRIPTION

       This program is part of Netpbm(1).

       pnmtoddif takes a PNM image and converts it into a DDIF image file.

       pnmtoddif  writes  PBM format (bitmap) data as a 1 bit DDIF, PGM format
       data (grayscale) as an 8 bit grayscale DDIF,  and  PPM  format  (color)
       data  as an 8,8,8 bit color DDIF.  pnmtoddif writes any DDIF image file
       uncompressed.  The data plane organization is interleaved by pixel.

       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.  Netpbm images
       do  not carry this information, hence you have to supply it externally.
       The default of 78 dpi has the beneficial  property  of  not  causing  a
       resize on most Digital Equipment Corporation color monitors.



OPTIONS

       resolution x y
              The  horizontal  and  vertical resolution of the output image in
              dots per inch.  Default is 78 dpi.





ARGUMENTS

       pnmfile
              The filename for the image file in pnm format.   Default  is  to
              read from Standard Input.


       ddiffile
              The  filename  for  the image file to be created in DDIF format.
              By default, pnmtoddif writes to Standard Output.





AUTHOR

       Burkhard Neidecker-Lutz, Digital Equipment Corporation,  CEC  Karlsruhe
       neideck@nestvx.enet.dec.com



netpbm documentation                 2003             Pnmtoddif User Manual(0)

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