You are here: Home has a collection of informative and interactive Java applets explaining basic digital image processing concepts.

Each applet is accompanied by a short tutorial explaining the underlying theory. Furthermore, comments are welcome and are displayed at the bottom of the page for each topic.

Our currently available tutorials/applets:

March 13, 2013: Unfortunately, the scaling of the spectrum in the convolution-based filters applet was a bit confusing -- now much improved!

March 11, 2013: Otsu's key in our new applet on threshold-based segmentation. Tutorial text to follow!

October 26, 2012: We're now using Disqus for handling our commenting.

October 13, 2012: This image of a woman's face that is used throughout the site; what's the story? The Lena/Lenna image on

August 10, 2012: A first draft of the tutorial text accompanying the color lookup tables applet is out.

April 29, 2012: Sticking to brightening up; an applet on color lookup tables is here! A tutorial text is, eh, to follow.

Feb 25, 2012: Color me gray! The accompanying tutorial text for the RGB-to-grayscale applet is out.

Nov 3, 2011: A new, colorful applet on RGB-to-grayscale conversion is now available! A tutorial text is soon to follow.

July 17, 2011: Finally, the accompanying tutorial text for the new convolution-based filters applet is here!

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