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It's easier than ever to de-censor videos

(www.jeffgeerling.com)
382 points DamonHD | 5 comments | 15 Apr 25 17:12 UTC | HN request time: 0.168s | source
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JKCalhoun ◴[15 Apr 25 19:32 UTC] No.43697402[source]▶
Yeah, that is pretty wild.

I recall a co-worker doing something related(?) for a kind of fun tech demo some ten years or so ago. If I recall it was shooting video while passing a slightly ajar office door. His code reconstructed the full image of the office from the "traveling slit".

I think about that all the time when I find myself in a public bathroom stall.... :-/

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1. Agree2468 ◴[15 Apr 25 19:58 UTC] No.43697649[source]▶
Line scan cameras operate on this principle, and are still used in various ways to this days. I'm especially partial to the surreal photos generated by them at the end of cycling races

https://finishlynx.com/photo-finish-trentin-sagan-tour-de-fr...

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2. JKCalhoun ◴[15 Apr 25 20:27 UTC] No.43697977[source]▶
I was not aware of those.

Reminds me of slit-scan as well. And of course rolling shutters.

3. whycome ◴[15 Apr 25 21:41 UTC] No.43698748[source]▶
Similar to

https://hackaday.com/2024/08/17/olympic-sprint-decided-by-40...

4. hifikuno ◴[15 Apr 25 21:44 UTC] No.43698771[source]▶
I love line scan cameras. Wikipedia has an awesome photo of a tram taken with a line scan camera on the relevant wiki page[1].

I've just moved to a house with a train line track out front. I want to see if I can use a normal camera to emulate a line scan camera. I have tried with a few random YouTube videos I found [2].

I think the biggest issue I face is that there simply isn't the frame rate in most camera's to get a nicely detailed line scan effect.

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[1]: https://en.wikipedia.org/wiki/Line-scan_camera

[2]: https://writing.leafs.quest/programming-fun/line-scanner

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5. mkl ◴[16 Apr 25 07:26 UTC] No.43702506[source]▶
A normal frame rate is probably enough if you do it with groups of columns rather than a single column of pixels. That's what https://trains.jo-m.ch/ does with a Raspberry Pi camera, posted in https://news.ycombinator.com/item?id=35738987 with lots of questions and answers.