vtopgm(1) convert image from Vista data file to portable graymap


vtopgm [-option ...] [infile] [outfile]


vtopgm converts one band of an image to a portable graymap (PGM) file. A wide range of filters are available to convert PGM files to other formats.

This program only produces portable graymaps whose pixel values are in the range 0 to 255. Any type of Vista image is accepted, but the image is first converted to have ubyte pixels if necessary. This conversion is performed by VConvertImageRange(3Vi).


vtopgm accepts the following options:
Prints a message describing options.
-in infile
Specifies a Vista data file containing the image to be converted. If the file contains more than one image, only the first is used.
-out outfile
Specifies the file to contain the portable graymap.
-band band
Specifies the image band to be converted. Default: 0.

Input and output files can be specified on the command line or allowed to default to the standard input and output streams.


David Lowe <[email protected]>