Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Technique developed to capture human movement in 3D

13.08.2008
Researchers from the Polytechnic University of Catalonia (UPC) and the University of Lovaina (UCL), in Belgium, have presented a technique that, using two video cameras to capture human movement, makes it possible to recognize body movements and display them in three dimension on a computer, according to the journal Multimedia Tools & Applications. The method can be applied to the development of interactive video games in which gestures are made with the hands and feet.

Engineer Pedro Correa, from the UCL Telecommunications and Teledetection Laboratory, told SINC that, together with professor Ferran Marqués's unit at the UPC, they have developed algorithms that tackle the problem of gesture recognition “in the least invasive way possible, since it does not require wearing any special suit or receivers, using a simple video camera to film the body's movement”.

The images filmed identify the person's outline several dozens of times a second, and the data obtained are analyzed by the algorithm invented by the researchers to identify the “crucial points”: head, hands and feet. The “crucial points extraction algorithm” uses the mathematical concept of geodesic distance to calculate the person's extremities, “in other words”, clarifies Correa, “which points are furthest away from the center of gravity, following a path entirely within the outline”.

Once the extremities have been obtained, the outline is analyzed once again to create "morphological skeletons" that help assign a label to each extremity. The five possible labels are head, left hand, right hand, left foot and right foot. Once identified, they are represented with colored dots for tracking in 2 dimensions. This enables the user to analyze the results visually.

To obtain the same information in 3 dimensions, the same steps are taken with an additional camera. This way, the triangulation of the labels extracted in each of the two views makes it possible to obtain the points in a three dimensional space. The front view provides information on the vertical and horizontal positions of the extremities, and the side view provides information on their depth.

The low level of complexity in this system allows it to be applied in real time on any personal computer, with a margin of error of between 4% and 9% in real situations, depending on the context and the quality of the segmentation carried out.

Correa explained that the applications of this technique are “all those that require motion interaction with the computer; that is, from browsing through applications in an operating system (like moving windows and text with hand movements) to interactive aerobic video games, and much more”. The study was also participated in by a Belgian company specializing in real-size video games, which are used, for example, in amusement parks and museums.

SINC Team | alfa
Further information:
http://www.plataformasinc.es

Further reports about: Multimedia Tools gesture human movement operating system video cameras

More articles from Information Technology:

nachricht Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale
18.01.2017 | The Hebrew University of Jerusalem

nachricht Data analysis optimizes cyber-physical systems in telecommunications and building automation
18.01.2017 | Fraunhofer-Institut für Algorithmen und Wissenschaftliches Rechnen SCAI

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>