Magazine article The Times Higher Education Supplement : THE

Unheimlich Manoeuvres in the Race to Make CGI Real

Magazine article The Times Higher Education Supplement : THE

Unheimlich Manoeuvres in the Race to Make CGI Real

Article excerpt

Why are almost-lifelike animated characters creepy? Chris Parr talks to a researcher exploring the 'uncanny valley'.

Will computer-created human beings in film or video games ever achieve complete believability, or will a discerning public always be too unnerved by the results?

This is the focus of work by researcher Angela Tinwell, who is looking at the concept of the "uncanny valley" - a phrase that describes the negative reaction people experience when computer-generated imagery of humans is "too realistic".

In short, you can make a hedgehog run around on its hind legs fighting evil, and people will find it adorable. But if you animate a life-like human, the brain starts to single out the inaccuracies and focus on them. And it causes unease.

"I'm fascinated by the increase in realism that is creeping into video games," said Dr Tinwell, a senior researcher in games and creative technology at the University of Bolton.

"You find there's a feeling of being uncomfortable when computer-generated characters are too real. With non-human characters with human-like traits, such as Sonic (the Hedgehog), it's different. But people are less accepting of characters as their human likeness increases."

Despite lots of people giving their views on the uncanny valley, little had been done to substantiate them. "There is no real empirical evidence to show designers why there is this negative response," Dr Tinwell says, explaining the reasons behind her research.

The phenomenon was originally described by Japanese roboticist Masahiro Mori. The "uncanny" refers to our emotional response to a robot or character, while the "valley" comes from a graph Mori created to demonstrate the phenomenon. It plots the dip in the positivity of human reaction to the realism of a character, and this dip is the valley.

Although people generally tend to warm to anthropomorphic creatures, when an animated character becomes too humanoid our perceptions can change very quickly.

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"Take the characters in (the film) Avatar," Dr Tinwell observed. "They are not strictly human because they have blue skin. I think (director James) Cameron introduced this feature as it reduces expectations. Because of the blue skin, we were more forgiving, since the film is not trying to convince us that they are human. However, when Steven Spielberg presented Tintin he was ripped apart, and criticised for creating an uncanny character. …

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