Edge Detector Dude is a sweet and sexy graphics utility that I've written in 2005 for the digital image segmentation course of the university and it looks like this:
It computes and renders the Sobel edge-detected and the gradient-directed versions of the input image. The pixels of the gradient-directed image are computed by denoting the angle of the gradients of the pixels and mapping their value to the relevant grayscale colors.
Edge Detector Dude is actually a PyGTK-based front end that uses the accompanying gradient utility that processes the input image. gradient is written in C using the Allegro game programming library.
It is pretty likely that I screwed the algorithm for the gradient-directed image because it doesn't resemble anything recognizable. Oh well...
To build gradient, you'll need the Allegro developer library which is contained by the liballegro-dev package on Debian. After having the dependencies installed you can easily build gradient by invoking make.
You don't have to build Edge Detector Dude, since it's a Python application however you'll need to have the PyGTK and the Python Glade packages installed which are named as python-gtk2 and python-glade2 in Debian.
Copy the package directory to any place you want. After that modify the program_dir variable in the beginning of the edge-detector-dude.py file to reflect the actual pathname of the application.
You can invoke Edge Detector Dude from any place from this moment on.
Enjoy!
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