Colours and Faces Tzu-Pei Grace Chen Sidney Fels Human Communication Technologies Lab

Presentation outline Colours and face relations offer a good starting point to tackle face metric problem Results from second pilot tests Discussion

Role of the human face Identity Communication Attractiveness

Challenge in face recognition Is there a face metric system that can adequately quantify all existing faces?

Why is it difficult in quantifying faces? Faces are transient We have sharp face recognition skills Infinite dimensions and acute recognition makes it hard

Previous work Face similarity metric –Eigenface [Turk and Pentland] –Shape free face [Craw et al and Bruce et al] Face attractiveness metric –Beauty mask [Marquardt]

Why is colour metaphor a good starting point? Multi-dimensional Well-researched (many systems) Has less dimension than faces Good to model from a smaller example

Colour and face relations Colour-blindness vs. face-blindness Verbal over-shadowing effect Colour, emotion and facial expression. Colour vs. face opponent mechanism Primary colours and existence of primary faces

Colour blindness and face blindness NormalBlind Colour Face

Opponent mechanism

Verbal foreshadowing Memory of both face and colours can be impaired if verbalized after studied For faces, this is due to a lack of words to describe the holistic properties Verbal descriptions limited to face features Perceptual ability surpass verbal ability Same for colours

Plutchik’s model of emotions

Primary faces? DNA evidence Localization of mating habit

Second experiment Investigating two types of axes and two kinds of interface. interface axes wheel dynamic slider T-S uncorrelatedT-S correlated

Findings from second pilot test Subjects refine their match around the range of distance [1,2] from the target The hump occurs most frequently with correlated sliders

Conclusion from pilot test For a small face space… interface axes wheel dynamic slider T-S uncorrelatedT-S correlated 

Summary Colour metaphor seems like a good starting point to tackle face metric problem Second pilot test- work in progress –investigates additive and subtractive face system

The End