Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Virtual reality helps scientists to see how we see

04.06.2003


Oxford scientists are using the latest virtual reality technology to study how we perceive the world in 3D. The “immersive virtual reality” used by the Virtual Reality Research Group at Oxford University allows subjects to walk around or look up and down while what they see through a headset changes accordingly – they can explore the virtual environment by literally walking around. Meanwhile, the scientists monitor how they are perceiving the dimensions of their ‘Matrix’-style world.



The researchers want to investigate how our visual system converts a 2D image on the retina into a 3D representation of the world – especially when we move around. Dr Andrew Glennerster, who heads the research group, explains: “Normally, as we move around, our eyes jump from object to object about three times a second, yet we are quite unaware of any change. We are also unaware of the swirling patterns of motion that are generated on the retina as we move in a static environment. How does the brain make sense of all this rapidly changing visual information?” By controlling that changing visual information using immersive virtual reality, the researchers can see how the brain reacts to specific visual cues.

In the experiments, visual environments are experienced in real time as the subject, wearing a headset projecting images to each eye, moves around. “The equipment tracks the observer’s head, arm and eye movements and changes the images the eyes see through the headset so as to mimic the changes that would occur if they were exploring a real environment,” explains Dr Glennerster. Previous research into 3D vision has usually been done with the observer’s head clamped in one position.


The virtual reality system can also play tricks on the observer, to study how the brain reacts to controlled variations. In one experiment, the scene gradually expands as the observer walks through it. The researchers have found the observer’s assumption that the room has stayed the same size is so strong that it seems to overcome evidence from motion parallax and binocular disparity (the normal visual cues for shape and size): people can be fooled into thinking two objects are the same size even when one is four times larger than the other.

The project draws together various disciplines, with psychologists and physiologists working in collaboration with engineers in the robotics group at Oxford. The research is in relatively early stages, but it could yield exciting results. “Very few experiments have ever been carried out that test how the brain represents 3D while a person is moving,” says Dr Glennerster. “This forms part of a bigger question troubling neuroscience – how is information from different times and places linked together in the brain in a coherent way?”

Ruth Collier | alfa
Further information:
http://www.physiol.ox.ac.uk

More articles from Interdisciplinary Research:

nachricht Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs
07.11.2017 | Technische Universität München

nachricht NRL clarifies valley polarization for electronic and optoelectronic technologies
20.10.2017 | Naval Research Laboratory

All articles from Interdisciplinary Research >>>

The most recent press releases about innovation >>>

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

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Previous evidence of water on mars now identified as grainflows

21.11.2017 | Physics and Astronomy

NASA's James Webb Space Telescope completes final cryogenic testing

21.11.2017 | Physics and Astronomy

New catalyst controls activation of a carbon-hydrogen bond

21.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>