Frei0r plugins in Akirad Ubuntu repository
The unofficial Ubuntu repository Akirad now hosts packages for easy install of Frei0r plugins. Akirad also hosts things like Cinelerra and Open Movie Editor which is not in the official Ubuntu repositories.
Check it out here: http://akiradproject.net/repository
Here's how to install Frei0r on your Ubuntu Hardy box:
sudo wget http://akirad.cinelerra.org/dists/hardy.list -O /etc/apt/sources.list.d/akirad.list
wget -q http://akirad.cinelerra.org/dists/akirad.key -O- | sudo apt-key add - && sudo apt-get update
sudo apt-get install frei0r-plugins
New release: GridFlow 0.9.4
GridFlow 0.9.4
http://gridflow.ca/download/gridflow-0.9.4.tar.gz
Gridflow is a multidimensional dataflow processing library for PureData, designed for interactive multimedia.
Continue reading " New release: GridFlow 0.9.4
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GEGL-0.0.18 released
GEGL 0.0.18
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GEGL (Generic Graphics Library) is a graph based image processing framework.
GEGL provides infrastructure to do demand based cached non destructive image
editing on larger than RAM buffers. Through babl it provides support for a
wide range of color models and pixel storage formats for input and output.
This development release will include optimizations for the cpu capabilities
of the host system. Pass --disable-mmx and --disable-sse to configure to
disable these when building packages that should work on a wider range of
hardware. Making GEGL adapt at runtime is a blocker for the next release.
There is no new API in this release thus bindings do not need to be updated.
Continue reading " GEGL-0.0.18 released
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New frei0r effects: edgeglow & k-means clustering
The edgeflow filter works as follows:
first a sobel filter is applied. The "lightness" of the resulting pixel is examined, where lightness is defined as (max+min)/2. Max and min are max(R,G,B) and min(R,G,B).
The lightness is then compared to a threshold value (set by the user from 0 - 255). If the lightness is > threshold, then the HSL (hue, saturation, lightness) values of the original pixel are computed. The two lightness values are added using a scaling factor for the sobel pixel. Finally the HSL values are converted back to RGB space to give the result.
Optionally, pixels where the sobel value is below the threshold can be darkened, to provide a heightened contrast effect.
The filter can be downloaded here:
http://www.xs4all.nl/~salsaman/edgeglow.tar.bz2
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The cluster plugin is an implementation of the popular and relatively simple k-means clustering algorithm, where regions of an image are identified by their proximity in color and space to cluster centers and assigned the average color of the region. The cluster centers are updated each frame with the average location of all the points in the region. If distance is given the most weight it looks like a voronoi diagram.
Demonstration video here made in gephex:
http://vimeo.com/1059913
Source and linux i386 .so here:
http://binarymillenium.googlecode.com/svn/trunk/frei0r/cluster/
