Gesture Description Language

Official logo of GDL Technology

Gesture Description Language (GDL or GDL Technology) is a method of describing and automatic (computer) syntactic classification of gestures and movements created[1][2] by doctor Tomasz Hachaj[3] (PhD) and professor Marek R. Ogiela[4](PhD, DSc). GDL uses context-free formal grammar named GDLs (Gesture Description Language script). With GDLs it is possible to define rules that describe set of gestures. Those rules play similar role as rules in classic expert systems. With rules it is possible to define static body positions (so called key frames) and sequences of key frames that create together definitions of gestures or movements. The recognition is done by forward chaining inference engine. The latest GDL implementations[5] utilize Microsoft Kinect controller and enable real time classification. The license for GDL-based software allows using those programs for educational and scientific purposes for free.

## References

1. ↑ Hachaj, Tomasz; Ogiela, Marek R. (2014). "Rule-based approach to recognizing human body poses and gestures in real time". Multimedia Systems 20 (1): 81–99. doi:10.1007/s00530-013-0332-2.
2. ↑ Hachaj, Tomasz; Ogiela, Marek R. (2012). "Semantic Description and Recognition of Human Body Poses and Movement Sequences with Gesture Description Language". Computer Applications for Bio-technology, Multimedia, and Ubiquitous City. Communications in Computer and Information Science. 353. pp. 1–8. doi:10.1007/978-3-642-35521-9_1. ISBN 978-3-642-35520-2.
3. ↑ "Cryptography and Cognitive Informatics Research Group, Pedagogical University, Krakow, Poland". http://www.cci.up.krakow.pl/.
4. ↑ "Prof. Dr. Marek R. Ogiela - personal webpage". http://home.agh.edu.pl/~mogiela/.
5. ↑ "Gesture Description Language". http://www.cci.up.krakow.pl/gdl/.

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