The premise of the movie Blow Up finally becomes reality.
Don
On 12/29/13 1:13 PM, John Palcewski wrote:
Identifiable Images of Bystanders Extracted from Corneal Reflections
[In other words, when your number comes up, we'll find YOU!!!]
Abstract:
Criminal investigations often use photographic evidence to identify
suspects. Here we combined robust face perception and high-resolution
photography to mine face photographs for hidden information. By
zooming in on high-resolution face photographs, we were able to
recover images of unseen bystanders from reflections in the subjects'
eyes.
To establish whether these bystanders could be identified from the
reflection images, we presented them as stimuli in a face matching
task (Experiment 1). Accuracy in the face matching task was well above
chance (50%), despite the unpromising source of the stimuli.
Participants who were unfamiliar with the bystanders' faces (n = 16)
performed at 71% accuracy [t(15) = 7.64, p<.0001, d = 1.91], and
participants who were familiar with the faces (n = 16) performed at
84% accuracy [t(15) = 11.15, p<.0001, d = 2.79]. In a test of
spontaneous recognition (Experiment 2), observers could reliably name
a familiar face from an eye reflection image.
For crimes in which the victims are photographed (e.g., hostage
taking, child sex abuse), reflections in the eyes of the photographic
subject could help to identify perpetrators.
Full study here:
http://bit.ly/1ejXIkL
