gimp
an image manipulation and paint program.
Synopsis
gimp
[-h] [--help] [--help-all]
[--help-gtk] [-v] [--version]
[--license] [--verbose] [-n]
[--new-instance] [-a]
[--as-new] [-i]
[--no-interface] [-d]
[--no-data] [-f]
[--no-fonts] [-s]
[--no-splash] [--no-shm]
[--no-cpu-accel]
[--display display]
[--session <name>] [-g]
[--gimprc <gimprc>]
[--system-gimprc <gimprc>]
[--dump-gimprc]
[--console-messages]
[--debug-handlers]
[--stack-trace-mode <mode>]
[--pdb-compat-mode <mode>]
[--batch-interpreter <procedure>]
[-b] [--batch <command>] [filename]
...
add an example, a script, a trick and tips
examples
source
gimp -i -b '(call_py_flipscale
"pics/*.jpg" 120 150)' -b '(gimp-quit 0)'
source
then /usr/bin/gimp $@
else
open -a Gimp
fi;
source
gimp -i -b '(simple-sinus-filter
"foo.png" "foosin.png")' -b '(gimp-quit 0)'
source
GIMP for Photoshoppers
Link: Official GIMP Doc.
Link: Handy Tweaks To Make GIMP Replace Photoshop
covers a couple features Photoshop has by default, but need to be
manually enabled on GIMP.
Tutorials: Gimp-tutorials.net
Tutorials: Gimpology.com
Tutorial: How to make GIMP have Photoshop's Layout
Tip: Click Edit -> Keyboard Shortcuts, and
read down the list. It's a great summary each all GIMP's
functions, what keyboard shortcut invokes them, and where they're
located in the menus.
Tip: Don't expect any of the keyboard shortcuts
to be the same! CTRL+D is now Duplicate, not Deselect. Transform
Selection is now SHIFT+T, not CTRL+T, M is now Move, not V...
Tip: The default layer has no "Alpha Chanel", so
deleting content (via the eraser, or DEL) erases it to the
background colour, not transparent.
Tip: The default transformation interpolation in
GIMP is "Cubic", whereas in Photoshop it is "None". You might
notice when scaling solid colours and wondering why it fades
out...
Tip: Space Bar MOVES now, instead of PAN. So
you're no longer moving your view around the image, you're now
moving the image around under your view... (At this point I'm
considering VM'ing windows...)
Tip: When drawing a line with the pencil tool,
if you want it to go straight (horz/vert/diag) in Photoshop you
would hold SHIFT before beginning to draw. In GIMP, click once
where you want to begin, then hold shift + ctrl, then click where
you want to end.
source
I want to change DPI with Imagemagick without changing the actual byte-size of the image data
Note that you can use exiftool to read out resolutions. For
example, exiftool '-*resolution*' c.jpg might show
Resolution Unit : inches
X Resolution : 300
Y Resolution : 300
exiftool also is able to set parameters, but as noted in man page
Image::ExifTool::TagNames, the Extra Tags
XResolution and YResolution are not writable by exiftool.
I don't know whether ImageMagick has resolution-changing options,
but would be surprised if it doesn't. Also, it is straightforward
to write gimp scripts to automate tasks like this, and also it is
possible to change resolutions with small programs. For example,
following is a C program (compilable via gcc setRes.c -O3
-Wall -o setRes) that reads the first few bytes of a jpeg
file, changes resolutions to 300, and rewrites them. The program
as shown uses constants for little-endian machines, like x86. If
run on a big-endian machine it should terminate with a message
like Error: xyz may be not a .jpg file, even if xyz
is a jpeg file. Note, I haven't tested the resulting
pictures via pdflatex; you probably would find it
worthwhile to post a question in the tex SE.
/* jiw -- 24 Sep 2012 -- Re: set resolution in a jpg -- Offered without
warranty under GPL v3 terms as at http://www.gnu.org/licenses/gpl.html
*/
#include <stdlib.h>
#include <stdio.h>
void errorExit(char *msg, char *par, int fe) {
fprintf (stderr, "\n%3d Error: %s %s\n", fe, msg, par);
exit (1);
}
// Note, hex constants are byte-reversed on little vs big endian machines
enum { JF=0x464a, IF=0x4649, L300=0x2c01, B300=0x012c, NEWRES=L300};
int main(int argc, char *argv[]) {
FILE *fi;
short int buf[9];
int r, L=sizeof buf;
if (argc<2) errorExit(argv[0], "requires a .jpg file name", 0);
fi = fopen(argv[1], "r+b");
if(!fi) errorExit("open failed for", argv[1], ferror(fi));
r = fread(buf, 1, L, fi);
if (r != L) errorExit("read failed for", argv[1], ferror(fi));
if (buf[3] != JF || buf[4] != IF) // Check JFIF signature
errorExit(argv[1], "may be not a .jpg file", 0);
buf[7] = buf[8] = NEWRES;
fseek(fi, 0, SEEK_SET);
r = fwrite(buf, 1, L, fi);
if (r != L) errorExit("write failed for", argv[1], ferror(fi));
return 0;
}
source
PDFs open in GIMP on Linux system
A bit of further research found that the offending file was
~/.local/share/applications/mimeapps.lst
source
Any web designers here made a transition from Photoshop to Gimp?
For a while, I used Gimp and it does work (and save you a small
fortune) but I have to say that I just did not like it as much. I
had no problems with compatibility but I just could not get on
with it.
Gimp slicing works well - my problems were mainly with actual
photo effects and editing.
Also, In my experience, Photoshop runs terrible in a VM,
especially the newest which uses GPU acceleration.
source
How do I slice a large image using GIMP?
I am all about using GIMP for everything and love it. However let
me suggest ImageMagick for this task. I have a file
called kids.png that is 2149x1433. I use the following command
found at http://www.imagemagick.org/Usage/crop/#crop_tile
and end up with 6 images that are identified as follows
Command
convert kids.png +gravity -crop 1000x1000 tiles_%d.png
Results
tiles_0.png PNG 1000x1000 2149x1433+0+0
tiles_1.png PNG 1000x1000 2149x1433+1000+0
tiles_2.png PNG 149x1000 2149x1433+2000+0
tiles_3.png PNG 1000x433 2149x1433+0+1000
tiles_4.png PNG 1000x433 2149x1433+1000+1000
tiles_5.png PNG 149x433 2149x1433+2000+1000
Then I put them back together with
convert tiles_[0-5].png -mosaic new.png
source
Free tool to extract objects from photos
Computer vision is a research area and a Hard
Problem. I don't think you should expect to find free
software that will do a good job of it.
source
Move all 3 GIMP's windows at the same time?
you can try moving multiple windows at the same time with a
script that use "wmctrl"
However Gimp (next versions) will soon consist of a single
window, as I heard from the blogs.
source
How to edit .pub format files on fedora?
The short answer is "no."
The longer answer is that you can probably set up Publisher with
CodeWeaver's Crossover Linux with some degree of success.
Probably using that and slowly/rapidly transitioning existing
files to Scribus or LibreOffice's Draw would be the best way to
go.
source
How do I create blurry effects with GIMP
The effect you are trying to archive is called "bokeh", and its
archived by dslr mirror cameras for parts of the scene that lie
outside the depth of field.
I've only ever used photoshop so I cannot tell you the specifics
for gimps but, the first thing you should do is select what you
don't want blurred and place it on a different layer, then apply
some sort of filder to blur out the background. I do not think
gimp has a depth of field blur filter, so using a gaussian blurr
will not give you a 'real' bokeh effect, but it'll be close
enough.
This tutorial will show you step by step how to do
it. Also btw, this question should probably be moved to graphical design.
source
Troubleshooting X sudden restart/crash using XFCE 4.8 with stylus pen
I was having this problem as a result of the 'x' media key (f4)
on my lenovo p500. The f4 key is by default an '[x] close' key.
Unless I hit fn first.
Anyway, pressing said key on the desktop kills xfce in one
keystroke. My current solution is to disable it with xmodmap:
- Use xev to read the keycode (focus the window and press the
media key)
- Use xmodmap -e 'keycode #=' to disable it, ie:
xmodmap
-e 'keycode 64='
source
GIMP command line, how to invert color of a list of picture and modify the color of them (by colorize, but in command line)
You're going to have an easier time doing this with something
like ImageMagick than GIMP on the command line.
With ImageMagick, you can use the negate command:
convert image.jpg -negate negated-image.jpg
And then colorize it:
convert negated-image.jpg -colorize 0,50,0 colorized-image.jpg
source
multilingual font in gimp (ubuntu linux)
The GIMP does not transliterate text; use a IME if you want to
input text in an alphabet your keyboard does not support.
source
How to use GIMP as an image viewer?
Your question is like asking how to use Photoshop as a simple
image viewer. As Sampo said, GIMP is simply not designed for it.
Using GIMP in this way is like using a car to go from the kitchen
to the bathroom. You can do it, but it isn't really worth the
trouble and it doesn't make the trip any easier.
Depending on what Linux distribution and Desktop Environment you
use, you almost certainly already have an image viewer installed.
Here are the defaults for some of the most popular Desktop
Environments.
Gnome: eog
Mate:eom
KDE: gwenview
XFCE: ristretto
One of these is sure to already be installed in your system.
description
GIMP is the
GNU Image Manipulation Program. It is used to edit
and manipulate images. It can load and save a variety of
image formats and can be used to convert between
formats.
GIMP can also
be used as a paint program. It features a set of drawing and
painting tools such as airbrush, clone, pencil, and paint
brush. Painting and drawing tools can be applied to an image
with a variety of paint modes. It also offers an extensive
array of selection tools like rectangle, ellipse, fuzzy
select, bezier select, intelligent scissors, and select by
color.
GIMP offers a
variety of plug-ins that perform a variety of image
manipulations. Examples include bumpmap, edge detect,
gaussian blur, and many others. In addition, GIMP has
several scripting extension which allow for advanced
non-interactive processing and creation of images.
GIMP ships with
a second binary called gimp-console. This binary is a
console-only version and behaves as if gimp was
called with the --no-interface
command-line option.
On platforms
with the D-Bus message bus system, GIMP will by default
check if an instance is already running in this user
session. If it detects that, it will pass all filenames
given on the command-line to the already running GIMP
instance and quit.
options
GIMP accepts
the following options:
-h, --help
Show GIMP command-line
options.
--help-all
Show all command-line
options.
--help-gtk
Show GTK+ command-line
options.
--help-gegl
Show GEGL command-line
options.
-v,
--version
Output version information and
exit. When combined with the --verbose option,
version information about libraries used by GIMP is shown as
well.
--license
Output license information and
exit.
--verbose
Be verbose and create
information on standard output.
-n,
--new-instance
Do not attempt to reuse an
already running GIMP instance. Always start a new one.
-a,
--as-new
Open filenames passed on the
command-line as new images, don’t set the filename on
them.
-i,
--no-interface
Run without a user
interface.
-d,
--no-data
Do not load patterns,
gradients, palettes, or brushes. Often useful in
non-interactive situations where startup time is to be
minimized.
-f,
--no-fonts
Do not load any fonts. No text
functionality will be available if this option is used.
--display
display
Use the designated X
display.
-s,
--no-splash
Do not show the splash
screen.
--no-shm
Do not use shared memory
between GIMP and its plug-ins. Instead of using shared
memory, GIMP will send the data via pipe. This will result
in slower performance than using shared memory.
--no-cpu-accel
Do not use CPU accelerations
such as MMX or SSE even if GIMP detects that your CPU
provides this functionality.
--session
<name>
Use a different sessionrc for
this GIMP session. The given session name is appended to the
default sessionrc filename.
-g,
--gimprc <gimprc>
Use an alternative gimprc
instead of the default one. Useful in cases where plug-in
paths or machine specs may be different.
--system-gimprc
<gimprc>
Use an alternate system gimprc
file.
--dump-gimprc
Output a gimprc file with
default settings.
--debug-handlers
Enable debugging signal
handlers.
-c,
--console-messages
Do not popup dialog boxes on
errors or warnings. Print the messages on the console
instead.
--stack-trace-mode
{never|query|always}
If a stack-trace should be
generated in case of fatal signals.
--pdb-compat-mode
{off|on|warn}
If the PDB should provide
aliases for deprecated functions.
--batch-interpreter
<procedure>
Specifies the procedure to use
to process batch events. The default is to let Script-Fu
evaluate the commands.
-b,
--batch <command>
Execute <command>
non-interactively. This option may appear multiple times.
The <command> is passed to the batch
interpreter. When <command> is - the
commands are read from standard input.
environment
GIMP respects a number of environment variables.
DISPLAY
to get the default host and display number.
GIMP2_DIRECTORY
to get the name of the personal GIMP directory. If unset
.gimp-2.8 is used. If this is an absolute path, it is used as is.
If it is a relative path, it is taken to be a subdirectory of the
home directory.
GIMP2_DATADIR
to get the base location for data files such as brushes and
patterns. If unset ${datarootdir}/gimp/2.0 is used.
GIMP2_LOCALEDIR
to get the base location for translations. If unset
${datarootdir}/locale is used.
GIMP2_PLUGINDIR
to get the base location for plug-ins and modules. If unset
${exec_prefix}/lib/gimp/2.0 is used.
GIMP2_SYSCONFDIR
to get the location of configuration files. If unset
/etc/gimp/2.0 is used.
On Linux GIMP can be compiled with support for binary
relocatibility. This will cause data, plug-ins and configuration
files to be searched relative to the location of the gimp
executable file unless overridden by the environment variables
mentioned above.
files
GIMP’s data files are stored in ${datarootdir}/gimp/2.0, where
${datarootdir} is set on install, but is typically /usr/share.
GIMP’s system-wide configuration files are stored in
/etc/gimp/2.0, where ${prefix} is typically /usr.
Most GIMP configuration is read in from the user’s init file,
$HOME/.gimp-2.8/gimprc. The system wide equivalent is in
/etc/gimprc. The system wide file is parsed first and the user
gimprc can override the system settings. /etc/gimprc_user is the
default gimprc placed in users’ home directories the first time
GIMP is run.
$HOME/.gimp-2.8/devicerc - holds settings for input
devices together with the tool, colors, brush, pattern and
gradient associated to that device.
$HOME/.gimp-2.8/gtkrc - users set of GIMP-specific GTK+
config settings. Options such as widget color and fonts sizes can
be set here.
/etc/gimp/2.0/gtkrc - system wide default set of GIMP-specific
GTK+ config settings.
$HOME/.gimp-2.8/menurc - user’s set of keybindings.
$HOME/.gimp-2.8/parasiterc - Stores all persistent GIMP
parasites. This file will be rewritten every time you quit GIMP.
$HOME/.gimp-2.8/sessionrc - This file takes
session-specific info (that is info, you want to keep between two
GIMP sessions). You are not supposed to edit it manually, but of
course you can do. This file will be entirely rewritten every
time you quit GIMP. If this file isn’t found, defaults are used.
$HOME/.gimp-2.8/templaterc - Image templates are kept in
this file. New images can conveniently created from these
templates. If this file isn’t found, defaults are used.
/etc/gimp/2.0/unitrc - default user unit database. It contains
the unit definitions for centimeters, meters, feet, yards,
typographic points and typographic picas and is placed in users
home directories the first time GIMP is ran. If this file isn’t
found, defaults are used.
$HOME/.gimp-2.8/unitrc - This file contains your user unit
database. You can modify this list with the unit editor. You are
not supposed to edit it manually, but of course you can do. This
file will be entirely rewritten every time you quit GIMP.
$HOME/.gimp-2.8/plug-ins - location of user installed
plug-ins.
$HOME/.gimp-2.8/pluginrc - plug-in initialization values
are stored here. This file is parsed on startup and regenerated
if need be.
$HOME/.gimp-2.8/modules - location of user installed
modules.
$HOME/.gimp-2.8/tmp - default location that GIMP uses as
temporary space.
${datarootdir}/gimp/2.0/brushes - system wide brush files.
$HOME/.gimp-2.8/brushes - user created and installed brush
files. These files are in the .gbr, .gih or .vbr file formats.
$HOME/.gimp-2.8/curves - Curve profiles and presets as
saved from the Curves tool.
$HOME/.gimp-2.8/gimpressionist - Presets and user created
brushes and papers are stored here.
$HOME/.gimp-2.8/levels - Level profiles and presets as
saved from the Levels tool.
${datarootdir}/gimp/2.0/palettes - the system wide palette files.
$HOME/.gimp-2.8/palettes - user created and modified
palette files. This files are in the .gpl format.
${datarootdir}/gimp/2.0/patterns - basic set of patterns for use
in GIMP.
$HOME/.gimp-2.8/patterns - user created and installed gimp
pattern files. This files are in the .pat format.
${datarootdir}/gimp/2.0/gradients - standard system wide set of
gradient files.
$HOME/.gimp-2.8/gradients - user created and installed
gradient files.
${datarootdir}/gimp/2.0/scripts - system wide directory of
scripts used in Script-Fu and other scripting extensions.
$HOME/.gimp-2.8/scripts - user created and installed
scripts.
${datarootdir}/gimp/2.0/gflares - system wide directory used by
the gflare plug-in.
$HOME/.gimp-2.8/gflares - user created and installed
gflare files.
${datarootdir}/gimp/2.0/gfig - system wide directory used by the
gfig plug-in.
$HOME/.gimp-2.8/gfig - user created and installed gfig
files.
${datarootdir}/gimp/2.0/images/gimp-splash.png - the default
image used for the GIMP splash screen.
${datarootdir}/gimp/2.0/images/gimp-logo.png - image used in the
GIMP about dialog.
${datarootdir}/gimp/2.0/tips/gimp-tips.xml - tips as displayed in
the "Tip of the Day" dialog box.
other info
The canonical place to find GIMP info is at http://www.gimp.org/.
Here you can find links to just about many other GIMP sites,
tutorials, data sets, mailing list archives, and more.
There is also a GIMP User Manual available at
http://docs.gimp.org/ that goes into much more detail about the
interactive use of GIMP.
The latest versions of GIMP and the GTK+ libs are always
available at ftp://ftp.gimp.org/.
splash images
GIMP comes with a default image for the splash screen but it
allows system administrators and users to customize the splash
screen by providing other images. The image to be used with the
splash screen is chosen as follows:
1.
GIMP tries to load a random splash screen from the directory
$HOME/.gimp-2.8/splashes.
2.
It then falls back to using
$HOME/.gimp-2.8/gimp-splash.png.
3.
If the user didn’t install any custom splash images, a random
image is picked from ${datarootdir}/gimp/2.0/splashes.
4.
As a last resort, GIMP uses the default splash image located at
${datarootdir}/gimp/2.0/images/gimp-splash.png.
suggestions and bug reports
Any bugs found should be reported to the online bug-tracking
system available on the web at http://bugzilla.gnome.org/. Before
reporting bugs, please check to see if the bug has already been
reported.
When reporting GIMP bugs, it is important to include a reliable
way to reproduce the bug, version number of GIMP (and probably
GTK+), OS name and version, and any relevant hardware specs. If a
bug is causing a crash, it is very useful if a stack trace can be
provided. And of course, patches to rectify the bug are even
better.
see also
gimprc,
gimptool,
authors
Spencer
Kimball, Peter Mattis and the GIMP Development Team.
With patches,
fixes, plug-ins, extensions, scripts, translations,
documentation and more from lots and lots of people all over
the world.