Free visual arts software for linux

Visual F-Prot is an F-Prot Antivirus for Linux Workstations graphical interface.

Visual F-Prot is graphical interface for F-Prot Antivirus(TM) for Linux Workstations for home use (available for free download) copyrighted by Frisk Software International (www.firsk.is). Before you install this program, you must install F-Prot Antivirus, because it wont work without it.

It works with F-Prot antivirus version 4.5.3 and above - its not tested with earlier versions,but it should also work with them.

Also, youll need "xterm" terminal emulator, provided by most, if not all linux distributions.

This program is built with GTKMM 2.4 C++ libraries, so youll also need those for it to work.

Visual REGEXP project can easily design and debug regular expressions by providing a graphical visualization of the expression and its matches on a sample of your choice.
Version restrictions:
- some regexp can consume a lot of CPU time. This seems to be caused by the use of -all, -inline and -indices flags together.
- when a subexpression is not matched (empty match), the last character of the previous match are coloured. This is due to a problem in Tcl (bug submitted to Scriptics).
Enhancements:
- new version done by Martin Lemburg. Many thanks, Martin.
- it is now a tcl 8.5a4 starpack
- GUI layout changed to be based on a paned window
- GUI code looks different, to be more ergonomic
- the informational labels (replacements & matches) are now sunken
- there are now additional the "first" and "last" navigation buttons
- there is a new option to navigate through matches or matches and submatches
- the displayed count of matches is changed to display the current and the count of matches used for navigation (probably changes, if the new navigation option is changed)
- the replace widget is disabled on startup
- the tcl console is added to the help menu
- the key bindings inside the regexp text widget changed a bit to allow for expanded regexp (-expanded or (?x)) to contain tabs and newlines. Tabs are created with Control-Tab and newlines with Control-Return. Additional with Control-C|V|X (not c|v|x) it is possible to use the clipboard like with Control|Shift-Insert, Shift-Delete.

Visual Automata Simulator is a tool for simulating, visualizing and transforming finite state automata and Turing Machines.
Visual Automata Simulator is a DFA, NFA and TM simulator.
Main features:
- Creates, simulates and transforms DFA and NFA machines
- Creates and simulates TM
- Batch tests for TM: useful features to test a bunch of files quickly!
- Easy-to-use GUI interface (multi-documents)
- Smart links between objects
- Machines can be drawn using the mouse - and resized at any time
- Multiple machines can be created in a single document
- Multiple documents can be opened at the same time
- Documents can be saved and reloaded from disk
- Debug mode to see exactly how the machine is working (each step has a different color)
- MacOS X GUI compliant.
Enhancements:
- FA and TM machine can be exported to EPS file
- integrated update manager
- preferences: can specify the character used to define an epsilon transition
- fixed a bug where epsilon transition were not considered when starting directly from a state instead of following a non-epsilon transition.

Kickarts is a simple Kicker (KDE Panel) applet to control the aRts sound server.
It has basically the same features as the commandline program artshell.
It is useful for quickly suspending or terminating the sound server before using an app without an arts output.
Enhancements:
- Fixed a few bugs
- New option to "notify when an error occurs"
- The update delay for the status check loop can now be specified
- Status icons (stopped, suspended and started) are now pngs
- French translation

Text::VisualWidth is a Perl module that provides functions to treat half-width and full-width characters and display correct size of text in one line on terminals and mobile phones. You can know the visual width of any text and truncate text by the visual width.

Now this module support EUC-JP and UTF-8 and tested only with Japanese.

Visual difference metrics can predict whether differences between two images are visible to the human observer or not. Such metrics are used for testing either visibility of information (whether we can see important visual information) or visibility of noise (to make sure we do not see any distortions in images, e.g. due to lossy compression).

The image below shows how two input images, a reference image (upper left) and a distorted image (lower left), are processed with the VDP to produce a probability of detection map (right). Such probability of detection map tells how likely we will notice a difference between two images for each part of an image.

Red color denotes high probability, green - low probability. Red color is mostly present in the areas where there is a snow covered path. Because of smooth texture of the snow, there is not much visual masking and distortions are easily visible.

Although there are dozens of visible difference metrics that serve a similar purpose, our Visual Difference Predictor for HDR images (HDR-VDP) has two unique advantages: firstly, our metric works with a full range of luminance values that can be meet in a real word (HDR images), and secondly, we offer a complete source code for free.

High Dynamic Range Visible Difference Predictor (HDR-VDP) can work within the complete range of luminance the human eye can see. An input to our metric is a high dynamic range (HDR) image, or an ordinary 8-bits-per-color image, converted to the actual luminance values. The proposed metric takes into account the aspects of high contrast vision, like scattering of the light in the optics (OTF), nonlinear response to light for the full range of luminance, and local adaptation.

MDKS Vertical Meters is a Super Karamba theme taken from http://www.kde-look.org/content/show.php?content=40009 by kilrae, added 2 more bars and makes some visual changes! MDKS Vertical Meters is a system monitor.

Tnx kilrae for this good idea, I like it!