mirror of https://github.com/GNOME/gimp.git
b00037b850
Previous algorithm was relying on strokes of small radius to detect points of interest. In order to work with various sizes of strokes, we were computing an approximate median stroke thickness, then using this median value to erode the binary line art. Unfortunately this was not working that well for very fat strokes, and also it was potentially opening holes in the line art. These holes were usually filled back later during the spline and segment creations. Yet it could not be totally assured, and we had some experience where color filling would leak out of line art zones without any holes from the start (which is the opposite of where this new feature is supposed to go)! This updated code computes instead some radius estimate for every border point of strokes, and the detection of end points uses this information of local thickness. Using local approximation is obviously much more accurate than a single thickness approximation for the whole drawing, while not making the processing slower (in particular since we got rid of the quite expensive erosion step). This fixes the aforementionned issues (i.e. work better with fat strokes and do not create invisible holes in closed lines), and also is not subject to the problem of mistakenly increasing median radius when you color fill in sample merge mode (i.e. using also the color data in the input)! Also it is algorithmically less intensive, which is obviously very good. This new version of the algorithm is a reimplementation in GIMP of new code by Sébastien Fourey and David Tschumperlé, as a result of our many discussions and tests with the previous algorithm. Note that we had various tests, experiments and propositions to try and improve these issues. Skeletonization was evoked, but would have been most likely much slower. Simpler erosion based solely on local radius was also a possibility but it may have created too much noise (skeleton barbs), with high curvature, hence may have created too many new artificial endpoints. This new version also creates more endpoints though (and does not seem to lose any previously detected endpoints), which may be a bit annoying yet acceptable with the new bucket fill stroking interaction. In any case, on simple examples, it seems to do the job quite well. |
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| devel-docs | ||
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| etc | ||
| icons | ||
| libgimp | ||
| libgimpbase | ||
| libgimpcolor | ||
| libgimpconfig | ||
| libgimpmath | ||
| libgimpmodule | ||
| libgimpthumb | ||
| libgimpwidgets | ||
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| menus | ||
| modules | ||
| pdb | ||
| plug-ins | ||
| po | ||
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| po-python | ||
| po-script-fu | ||
| po-tags | ||
| po-tips | ||
| po-windows-installer | ||
| themes | ||
| tools | ||
| .dir-locals.el | ||
| .gitignore | ||
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| AUTHORS | ||
| COPYING | ||
| ChangeLog.pre-1-0 | ||
| ChangeLog.pre-1-2 | ||
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| ChangeLog.pre-2-2 | ||
| ChangeLog.pre-2-4 | ||
| ChangeLog.pre-2-6 | ||
| ChangeLog.pre-git | ||
| HACKING | ||
| INSTALL.in | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile.am | ||
| NEWS | ||
| NEWS.pre-2-0 | ||
| NEWS.pre-2-2 | ||
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| README | ||
| README.i18n | ||
| acinclude.m4 | ||
| authors.dtd | ||
| authors.xml | ||
| authors.xsl | ||
| authors4gimp-web.xsl | ||
| autogen.sh | ||
| config.h.win32 | ||
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README
------------------------------
GNU Image Manipulation Program
2.99 Development Branch
------------------------------
This is an unstable development release, an intermediate state on the
way to the next stable release: GIMP 3. GIMP 2.99 may or may not do what
you expect. Save your work early and often. If you want a stable
version, please use GIMP 2.10 instead.
If you think you found a bug in this version, please make sure that it
hasn't been reported earlier and that it is not just new stuff that is
still being worked on and obviously not quite finished yet.
If you want to hack on GIMP, please read the file HACKING. For
detailed installation instructions, see the file INSTALL.
1. Web Resources
================
GIMP's home page is at:
https://www.gimp.org/
Please be sure to visit this site for information, documentation,
tutorials, news, etc. All things GIMP-ish are available from there.
The automated plug-in registry is located at:
https://registry.gimp.org/
There you can get the latest versions of plug-ins, using a convenient
forms-based interface.
The latest version of GIMP can be found at:
https://www.gimp.org/downloads/
2. Mailing Lists
================
We have several mailing lists dedicated to GIMP user and development
discussion. There is more info at
https://www.gimp.org/mail_lists.html
Links to several archives of the mailing lists are included in that page.
Gimp-user-list is a mailing list dedicated to user problems, hints and
tips, discussion of cool effects, etc. Gimp-developer-list is oriented
to GIMP core and plug-in developers. Gimp-gui-list is for discussing
about GIMP interface to improve user experience. Most people will only
want to be subscribed to gimp-user-list. If you want to help develop
GIMP, the gimp-developer mailing list is a good starting point; if you
want to help with GUI design, the gimp-gui list is where you want to
subscribe.
3. IRC
======
And finally, for the real junkies, there is an IRC channel devoted to
GIMP. On GIMPNet (a private free software oriented network) there is
#gimp. Many of the developers hang out there. Some of the GIMPNet
servers are:
irc.gimp.org:6667
irc.us.gimp.org:6667
irc.eu.gimp.org:6667
4. Customizing
==============
The look of GIMP's interface can be customized like any other GTK+ app
by editing files in `${XDG_CONFIG_HOME}/gtk-3.0/` (settings.ini and
gtk.css in particular) or by using "themes" (ready-made customizations).
Additionally, GIMP reads `${XDG_CONFIG_HOME}/GIMP/2.99/gimp.css` so you
can have settings that only apply to GIMP.
Included is a set of keybindings similar to those in Adobe Photoshop.
You can find them in the ps-menurc file. To use them, copy this file
to `${XDG_CONFIG_HOME}/GIMP/2.99/menurc`. You can also manually change
the keybindings to any of your choice by editing:
`${XDG_CONFIG_HOME}/GIMP/2.99/menurc`.
Have fun,
Spencer Kimball
Peter Mattis
Federico Mena
Manish Singh
Sven Neumann
Michael Natterer
Dave Neary
Martin Nordholts