[redox99]

> which is readily reversible by even primitive algorithms.

Not true unless you know beforehand the exact kernel. Besides, there's 0 reason why a camera software be programmed to, or attempt to revert Gaussian blur.

And finally, he downsampled the image, and you can't recover from that.

[geoduck14]

Isn't a gaussian blur a pretty standard blur done by a poorly focused camera? Perhaps Samsung went to great lengths to reverse a Gaussian blur because it happens all the time?

[jrockway]

Gaussian blur and the blur from out-of-focus lenses are a different kind of blur: https://en.wikipedia.org/wiki/Defocus_aberration https://en.wikipedia.org/wiki/Gaussian_blur

[Jasper_]

No, a real camera would give you a box blur, because the out-of-focus light rays are distributed uniformly across the sensor.

[toxik]

Gaussian blur is indeed super common in nature, any sum of noise will be Gaussian in the limit.