This week I started a free online course on Coursera from the University of London: the camera never lies:
https://www.coursera.org/course/lyingcamera
We're all used to seeing manipulated images such as the blatant photos on these links:
http://thecreatorsproject.vice.com/blog/photo-manipulations-transform-everyday-objects-into-surreal-devices
http://thecreatorsproject.vice.com/blog/entwined-roads-will-make-your-head-spin
But what about images we don't realise are manipulated? How do we detect these? The BBC reports on a lie detector test developed for just this:
http://www.bbc.co.uk/news/technology-23000438
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