NAME¶
pnmtov - convert portable anymap (PNM) image to Vista data file
SYNOPSIS¶
pnmtov [
-option ...] [
infile] [
outfile]
DESCRIPTION¶
pnmtov converts an image from a portable anymap (PNM) file to a Vista
data file. The following types of portable anymap may be converted:
- •
- Portable bitmap (PBM) and its ``rawbits'' variant. A PBM
image is converted to a single-band Vista image with bit pixels.
Pixel values 0 and 1 are swapped since, for PBM images, 0 denotes white
and 1 denotes black.
- •
- Portable graymap (PGM) and its ``rawbits'' variant. A PGM
image is converted to a single-band Vista image with ubyte pixels.
The full range of PGM pixel values is mapped to [0,255] in the returned
image.
- •
- Portable pixmap (PPM) and its ``rawbits'' variant. A PPM
image is converted to an RGB color image (nbands: 3,
ncolors: 3, color_interp: rgb) with ubyte
pixels. The full range of PPM pixel values is mapped to [0,255] in the
returned image.
A wide range of filters are available for converting other image formats to PNM.
COMMAND LINE OPTIONS¶
pnmtov accepts the following options:
- -help
- Prints a message describing options.
- -in infile
- Specifies the input file, which is a PBM, PGM, or PPM
file.
- -out outfile
- Specifies the output file, which will be a Vista data
file.
- -name name
- Specifies the name to be given the converted image.
Default: ``image''.
Input and output files can be specified on the command line or allowed to
default to the standard input and output streams.
SEE ALSO¶
VImage(3Vi),
Vfile(5Vi),
Vista(7Vi),
pnm(5),
pbm(5),
pgm(5),
ppm(5)
AUTHOR¶
Daniel Ko <ko@cs.ubc.ca>