I’ve known about this for decades and have taken precautions when doing portraits by standing behind the light, wearing shades, etc. and do everything short of wearing a bag over my head. It’s the kind of thing one learns when shooting silverware or jewelry.
On Dec 29, 2013, at 3:09 PM, Don Roberts wrote: 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
Art Faul
The Artist Formerly Known as Prints ------ Camera Works - The Washington Post
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