> A Gaussian blur is not reversable This might be narrowly true (it’s hard to recover precisely the original image), but is not really an accurate summary in t

> A Gaussian blur is not reversable This might be narrowly true (it’s hard to recover precisely the original image), but is not really an accurate summary in this context, if the only goal of reversal here is to recognize the face. Deconvolution will quite effectively undo gaussian blur. https://en.wikipedia.org/wiki/Deconvolution https://en.wikipedia.org/wiki/Deconvolution https://en.wikipedia.org/wiki/Richardson–Lucy_deconvolution https://en.wikipedia.org/wiki/Richardson–Lucy_deconvolution https://en.wikipedia.org/wiki/Blind_deconvolution https://en.wikipedia.org/wiki/Blind_deconvolution In Photoshop, the deconvolution tool is called “Smart Sharpen”, and has a preset for a gaussian PSF.