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.
Ruth Collier | alfa
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