No matter what one makes of the Lytro cameras – the “shoot now, focus later” feature is no doubt interesting, but the cameras weren’t a success due to unusual bodies and control concepts, low resolution and steep prices – there is no denying that the concept behind light-field cameras, which made the jump into consumer territory with the Lytros, is a fascinating one.
However, not everyone has the time to read scientific dissertations on the topic, in order to grasp the functional principle behind these cameras. For such “dummies” – and I count myself among them – the YouTube channel Computerphile has created a 12-minutes long video. Therein Mike Pound, an image analyst at the University of Nottingham, explains in simple terms how a light-filed camera actually works.
This is by no means the only video on the said YouTube channel worth watching. I also found Secrets Hidden in Images (Steganography) very interesting. It’s hard to believe, that Shakespeare’s entire body of work can be hidden in a single JPEG file, without anyone being able to tell the difference with the naked eye between the manipulated and the authentic image file.