this post was submitted on 14 Mar 2024
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[–] Hazmatastic@lemm.ee 68 points 8 months ago (3 children)

I've heard blur is not destructive. Please use a paintbrush on 100% opacity if you do this

When I post pictures with blurred information, I replace the info with something trollish and then blur it. Nobody appreciated that so far. :(

[–] holomorphic@lemmy.world 36 points 8 months ago (4 children)

Depends on the kind of blur. Some kinds can indeed be almost perfectly removed if you know the used blurring function, others are destructive. But, yes, don't take that chance. Always delete/paint over sensitive information.

Source: we had to do just that in a course I took a long time ago.

[–] Grass@sh.itjust.works 15 points 8 months ago (1 children)

I prefer sampling the surroundings, typing out a different number or text over it, then blurring with a non destructive effect.

[–] Hazmatastic@lemm.ee 13 points 8 months ago* (last edited 8 months ago) (1 children)

Name: Phil McCracken

SSN: EAT-MY-NUTS

Just for anyone who tries

[–] VicksVaporBBQrub@sh.itjust.works 2 points 7 months ago

Signature: ...

[–] iAvicenna@lemmy.world 8 points 8 months ago (1 children)

wouldn't you also need to know in what kind of pattern the blur was applied. I am sure if you do it multiple times starting from multiple non identical partitioning of the region, it will be impossible.

[–] Patches@sh.itjust.works 6 points 8 months ago

You're severely underestimating the power of weaponized autism.

[–] sunbeam60@lemmy.one 8 points 8 months ago* (last edited 7 months ago) (1 children)

Ah man, I remember when they caught some pedo creep who used a non-destructive blur on the CSAM materials he produced that included his face. So satisfying.

[–] saruwatarikooji@lemmy.world 2 points 7 months ago

He only spiral blurred his face... So they just did it in the opposite direction. It was beyond stupid

[–] MonkderZweite@feddit.ch 6 points 8 months ago

Always paint over sensitive information.

Not in PDF tho. There, the stroke is saved in metadata..

[–] Landless2029@lemmy.world 3 points 8 months ago (1 children)

I've switched to a mosaic blur. Looks neat and always destructive.

[–] ChaoticNeutralCzech@feddit.de 7 points 7 months ago* (last edited 7 months ago) (1 children)

Actually not always, there is a script that can recover text from mosaic'd screenshots if the font and pixellation technique is known. I just use a fake mosaic – the easiest way is to paste a bitmap of non-confidential text from elsewhere in the screenshot and then apply the filter.

[–] Landless2029@lemmy.world 2 points 7 months ago* (last edited 7 months ago)

Thanks for that.

I'm glad I use really huge pixels though. Would be hard to crack these: