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As someone who's been dealing with a lot of low mood lately, it really brightens my day to hear someone express gratitude for my anonymous, unauthorized trail maintenance.
Text blurred for privacy reasons.
this post was submitted on 19 Apr 2025
451 points (98.7% liked)
Lemmy Be Wholesome
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Don't use blurry text if you want to censor it, as it can be unblurred. Just use a solid color box.
I would be very impressed if that blurring could be effectively uncensored.
Well, there's Unredacted which just tries to brute force it - see this blog post. Then there's DepixHMM which uses Hidden Markov Models and links to the research paper it's based on.
The example Unredacted used is 4 pixels high. The one in the screenshot seems to only be 2 pixels high.
True, this would make it harder. But... On the other hand, its not a random password but text. If you know (or guess) the language you may be able to employ other tricks like "how common is each letter?", "which combination of letters is more common in this language?" And so on. Maybe the hidden markov model mentioned in the research paper does that (which would be one thing that Markov Models do IIRC).
Right, technically even one pixel per letter could be solvable. Different letters would mostly result in a slightly different hue. And if multiple letters have the same, it could be guessed via the neighbours and statistical frequency of each letter.
We also have the context and could specifically look for words like trees, path, thank, saw first.
Isn't this software available? People keep telling me that it could be decensored, but no one has tried it.
I wonder if an entire line gets blurred with one pattern-- therefore if you know what the emojis are supposed to look like it can help figure out the blurring pattern
There's quite a lot of information in those pixels. You can make out gaps between words, risers and descenders, two smileys in the first paragraph which I reckon are probably a smiley and a thumbs up which will further narrow down the possibilities for the words in their vicinity. Constrain that further with English language rules and I reckon that'd get you most of the way there.
Not to mention that you know that exact typeface and pixel perfect location where letters can be, so it should be relatively easy to go through each possible subsequent character and match the pixelated value.
Check this out: https://youtu.be/acKYYwcxpGk
This only applies to videos as far as I know.
edit: apparently not
Nope, it's a general rule. See for example https://bishopfox.com/blog/unredacter-tool-never-pixelation
What do you actually get out of being rude to strangers online for no reason? We’ve never even interacted before. You just show up in a space that’s meant to be about good vibes, and your first instinct is to insult someone - not just for being wrong, but even more for admitting it.
Or pixelated blurs
Troll option. Replace the text with lorem Ipsum, then pixelate that.