Re:Game of Thrones leak and watermark: a stupid tracking system
by peeters on Monday April 13, 2015 @10:48AM
(#9367931)
It's a deterministic process, but it still has inputs. You'd have to know those inputs or test for every possible set of inputs to whatever blurring method was used.
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Re:Game of Thrones leak and watermark: a stupid tracking system
by darkmighty on Monday April 13, 2015 @06:41PM
(#9371001)
It depends on the blurring method. If you do a gaussian blur, for example, you might be able to do a pretty good inverse blur by finding black frames and performing blind deconvolution. If I were at risk I'd use a nonlinear injective filter instead, to make sure information is lost (linear filtering is not only deterministic but perfectly without noise and no frequency response nulls).