Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Mask-bot: A robot with a human face

07.11.2011
Robotics researchers in Munich have joined forces with Australian and Japanese scientists to develop an ingenious technical solution that gives robots a human face.

By using a projector to beam the 3D image of a face onto the back of a plastic mask, and a computer to control voice and facial expressions, the researchers have succeeded in creating Mask-bot, a startlingly human-like plastic head. Yet even before this technology is used to give robots of the future a human face, it may well soon be used to create avatars for participants in video conferences. The project is part of research being carried out at CoTeSys, Munich’s robotics Cluster of Excellence.


Mask-bot: A robot with a human face
Uli Benz / Technical University of Munich

Mask-bot can already reproduce simple dialog. When Dr. Takaaki Kuratate says “rainbow”, for example, Mask-bot flutters its eyelids and responds with an astoundingly elaborate sentence on the subject: “When the sunlight strikes raindrops in the air, they act like a prism and form a rainbow”. And when it talks, Mask-bot also moves its head a little and raises its eyebrows to create a knowledgeable impression.

What at first looks deceptively like a real talking person is actually the prototype of a new robot face that a team at the Institute for Cognitive Systems (ICS) at TU München has developed in collaboration with a group in Japan. “Mask-bot will influence the way in which we humans communicate with robots in the future,” predicts Prof. Gordon Cheng, head of the ICS team. The researchers developed several innovations in the course of creating Mask-bot.

The projection of any number of realistic 3D faces is one of these. Although other groups have also developed three-dimensional heads, these display a more cartoon-like style. Mask-bot, however, can display realistic three-dimensional heads on a transparent plastic mask, and can change the face on-demand. A projector positioned behind the mask accurately beams a human face onto the back of the mask, creating very realistic features that can be seen from various angles, including the side.

Many comparable systems project faces onto the front of a mask – following the same concept as cinema projection. “Walt Disney was a pioneer in this field back in the 1960s,” explains Kuratate. “He made the installations in his Haunted Mansion by projecting the faces of grimacing actors onto busts.” Whereas Walt Disney projected images from the front, the makers of Mask-bot use on-board rear projection to ensure a seamless face-to-face interaction.

This means that there is only a twelve centimeter gap between the high-compression, x0.25 fish-eye lens with a macro adapter and the face mask. The CoTeSys team therefore had to ensure that an entire face could actually be beamed onto the mask at this short distance. Mask-bot is also bright enough to function in daylight thanks to a particularly strong and small projector and a coating of luminous paint sprayed on the inside of the plastic mask. “You don’t have to keep Mask-bot behind closed curtains,” laughs Kuratate.

This part of the new system could soon be deployed in video conferences. “Usually, participants are shown on screen. With Mask-bot, however, you can create a realistic replica of a person that actually sits and speaks with you at the conference table. You can use a generic mask for male and female, or you can provide a custom-made mask for each person,” explains Takaaki Kuratate.

In order to be used as a robot face, Mask-bot must be able to function without requiring a video image of the person speaking. A new program already enables the system to convert a normal two-dimensional photograph into a correctly proportioned projection for a three-dimensional mask. Further algorithms provide the facial expressions and voice.

To replicate facial expressions, Takaaki Kuratate developed a talking head animation engine – a system in which a computer filters an extensive series of face motion data from people collected by a motion capture system and selects the facial expressions that best match a specific sound, called a phoneme, when it is being spoken. The computer extracts a set of facial coordinates from each of these expressions, which it can then assign to any new face, thus bringing it to life. Emotion synthesis software delivers the visible emotional nuances that indicate, for example, when someone is happy, sad or angry.

Mask-bot can realistically reproduce content typed via a keyboard – in English, Japanese and soon German. A powerful text-to-speech system converts text to audio signals, producing a female or male voice, which can then set to quiet or loud, happy or sad, all at the touch of a button.

But Mask-bot is not yet able to understand much of the spoken word. It can currently only listen and make appropriate responses as part of a fixed programming sequence. However, this is not something that is restricted to Mask-bot alone. A huge amount of research worldwide is still being channeled into the development of programs that enable robots to listen and understand humans in real time and make appropriate responses. “Our established international collaboration is therefore more important than ever,” explains Kuratate.

The CoTeSys group has chosen a different route to researchers who use dozens of small motors to manipulate individual facial parts and reproduce facial expressions. Mask-bot will be able to combine expression and voice much faster than slower mechanical faces. The Munich researchers are already working on the next generation. Mask-bot 2 will see the mask, projector and computer control system all contained inside a mobile robot. Whereas the first prototype cost just under EUR 3,000, costs for the successor model should come in at around EUR 400. Besides video conferencing, “These systems could soon be used as companions for older people who spend a lot of time on their own,” continues Kuratate.

Mask-bot is the result of collaboration with AIST, the National Institute of Advanced Industrial Science and Technology in Japan.

Contact:
Dr. Takaaki Kuratate
Institute for Cognitive Systems (Chair: Prof. Gordon Cheng)
Technische Universitaet Muenchen and
CoTeSys Cluster of Excellence (Cognition for Technical Systems)
Phone: +49 89 289 25765 (PR Officer Wibke Borngesser, M.A.)
E-Mail: kuratate@tum.de, borngesser@tum.de

Dr. Ulrich Marsch | idw
Further information:
http://www.ics.ei.tum.de

More articles from Power and Electrical Engineering:

nachricht Laser sensor LAH-G1 - optical distance sensors with measurement value display
15.08.2017 | WayCon Positionsmesstechnik GmbH

nachricht Engineers find better way to detect nanoparticles
14.08.2017 | Washington University in St. Louis

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

Im Focus: Scientists improve forecast of increasing hazard on Ecuadorian volcano

Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).

The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

New thruster design increases efficiency for future spaceflight

16.08.2017 | Physics and Astronomy

Transporting spin: A graphene and boron nitride heterostructure creates large spin signals

16.08.2017 | Materials Sciences

A new method for the 3-D printing of living tissues

16.08.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>