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NIP2(1)			    General Commands Manual		       NIP2(1)

NAME
       nip2 - image processing with the	VIPS library

SYNOPSIS
       nip2 [filename1 ...]
       nip2 -s filename	[arg1 ...]
       nip2 -e expression [arg1	...]

DESCRIPTION
       nip2 (for New Image Processing) is a tool for manipulating images using
       the VIPS	image processing library.

       There are three principal modes:

       nip2 [filename1 ...]
	 start in GUI mode, loading the	named files

       nip2 -e expression [arg1	...]
       nip2 --expression=EXPRESSION [arg1 ...]
	 start in no-GUI mode; set main	= expression, set list argv to
	 ["filename", "arg1", "arg2", ...], set	argc to	length of list;	print
	 the value of symbol "main" to stdout; exit

       nip2 -s filename	[arg1 ...]
       nip2 --script=FILENAME [arg1 ...]
	 start in no-GUI mode; read in filename	as a set of definitions,
	 set list argv to ["filename", "arg1", "arg2", ...], set argc to
	 length	of list; print the value of symbol "main" to stdout; exit;
	 useful	for running nip2 as an interpreter on unix

       You can use -o to direct	output to a file rather	than stdout.

       -o filename
       --output=FILENAME
	 the value of main is written to the named file. If main is a
	 list, the filename is incremented between objects. You	can use
	 the suffix to specify the format and options to write in

       Other  options  provide finer control over startup and shutdown.	If you
       need to do something strange, don't use -e/-s, use  these  in  combina-
       tion.

       -b
       --batch
	 batch (ie. non-GUI) mode

       -m
       --no-load-menus
	 don't load menus, for faster startup

       -a
       --no-load-args
	 don't load extra command-line arguments

       -w
       --stdin-ws
	 load stdin as a workspace

       -d
       --stdin-def
	 load stdin as a set of	definitions

       -p
       --print-main
	 print the value of main on exit. nip2 will check for a	top-level
	 symbol	called main, and also check each workspace for a main

       Finally	some  other  options  are useful for debugging,	timing and for
       generating strings for internationalisation.

       -V
       --verbose
	 produce verbose error messages: handy for debugging in	batch mode

       -i
       --i18n
	 output	strings	from .def files	for internationalisation

       -v
       --version
	 print version information

       -c
       --benchmark
	 benchmark: no GUI, just start up and shut down

       -t
       --time-save
	 time saves: after every image save a popup tells you the time the
	 save took in seconds

       -T
       --test
	 test: start up	(including any arg processing),	test for any errors,
	 and exit with an error	code if	any occured. Useful for	running
	 automated tests.

       -x PREFIX
       --prefix=PREFIX
	 set install prefix: start up as if nip2 had been installed to PREFIX.
	 Useful	for running automated tests without installing the thing.

EXAMPLES
	 nip2 fred.jpg

       Start nip2, loading fred.jpg.

	 nip2 -e "2 + 2"

       Prints 4	to stdout.

	 nip2 -e "99 + Image_file argv?1" -o result.png	fred.jpg

       Load argv1 (fred.jpg), add 99, output to	result.png.

	 nip2 -e "Matrix [[1,2],[4,5]] ** -1" -o poop.mat

       Invert the 2x2 matrix and write the result to poop.mat.

COPYRIGHT
       2008 (c)	Imperial College, London

				  Oct 4	2004			       NIP2(1)

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