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JKCalhoun commented on Line scan camera image processing for train photography   daniel.lawrence.lu/blog/y... · Posted by u/dllu
JKCalhoun · an hour ago
Reminds me of the early experiments with using a flat-bed scanner as a digital back. Here is one: https://www.sentex.net/~mwandel/tech/scanner.html
JKCalhoun commented on Line scan camera image processing for train photography   daniel.lawrence.lu/blog/y... · Posted by u/dllu
GlibMonkeyDeath · 2 hours ago
If you like this sort of thing, check out https://www.magyaradam.com/wp/ too. A lot of his work uses a line scan camera.
JKCalhoun · an hour ago
The video [https://www.magyaradam.com/wp/?page_id=806] blew my mind. I can only image he reconstructed the video by first reconstructing one frame's worth of slits — then shifting them over by one column and adding the next slit data.
JKCalhoun commented on Line scan camera image processing for train photography   daniel.lawrence.lu/blog/y... · Posted by u/dllu
Etheryte · an hour ago
Imagine a camera that only takes pictures one pixel wide. Now make it take a picture, for example, 60 times a second and append every pixel-wide image together in order. This is what's happening here, it's a bunch of one pixel wide images ordered by time. The background stays still as it's always the same area captured by that one pixel, resulting in the lines, but moving objects end up looking correct as they're spread out over time.

At first, I thought this explanation would make sense, but then I read back what I just wrote and I'm not sure it really does. Sorry about that.

JKCalhoun · an hour ago
Yeah, like walking past a door that's cracked just a bit so you can see into an office only a slit. Now reconstruct the whole office from that traveling slit that you saw.

Very cool.

JKCalhoun commented on Self-driving cars begin testing on NYC streets   amny.com/nyc-transit/self... · Posted by u/pkaeding
tjwebbnorfolk · 8 hours ago
If a car can drive itself, what's stopping that from becoming the public transportation of the next decade?

Or are you just ideologically against anything that doesn't pack people into tubes in order to "save the planet"?

JKCalhoun · 5 hours ago
As a species, (health-wise, resource-wise) we'd be better off with "walkable cities". Continuing to push cars as the mode of transportation makes walkable cities even less likely.

Curious, are you really making light of "saving the planet"?

JKCalhoun commented on The ROI of Exercise   herman.bearblog.dev/exerc... · Posted by u/ingve
chaostheory · 11 hours ago
If you’re struggling with exercise and with getting it into a routine, I can’t recommend standalone, wireless VR enough. It was fun and engaging enough to keep me coming back without feeling that I was doing a boring chore, and nearly every game has you moving, with the exception of the flying and driving sims.

Imagine fighting ninjas and dodging bullets as your workout. You can literally get that and more with VR.

It was my gateway back into fitness.

JKCalhoun · 9 hours ago
Stepmania [1] (open DDR clone) just requires a (decent) dance pad, no VR. That's as good a work you as you'll get from a game, I suspect.

[1] https://www.stepmania.com/download/

JKCalhoun commented on Self-driving cars begin testing on NYC streets   amny.com/nyc-transit/self... · Posted by u/pkaeding
gyomu · 10 hours ago
Self-driving is one of the most interesting technologies of our times, from a legislative/social standpoint.

Will every large city in the globe be filled with self driving cars in 2035, or will the situation be roughly identical to 2025?

Honestly it feels like it could go either way - the last ten years have been such "one step forward, two steps sideways, one half step backwards" on every front - what the technology seems able to deliver on, what companies claim they can/will do, what regulators and the common people make of them, freak accidents that inevitably sway the popular opinion, etc.

Personally I hope the technology matures and becomes ubiquitous in my lifetime (the sooner the better), because I hate driving (a few acquaintances have been in grisly accidents due to drunk drivers coming the other way) and I just want to get in a car at 10p with my backpack in tow, lie down, and wake up at 7a 600 miles away.

JKCalhoun · 9 hours ago
To the degree that self-driving cars limit the adoption of public transportation, I am wholly against the technology.
JKCalhoun commented on David Klein's TWA Posters (2018)   flashbak.com/david-kleins... · Posted by u/NaOH
netsharc · 11 hours ago
JKCalhoun · 9 hours ago
I assumed a hat (there do appear to be two trailing ribbons coming out — gives me a "Heidi" vibe).
JKCalhoun commented on 1981 Sony Trinitron KV-3000R: The Most Luxurious Trinitron [video]   youtube.com/watch?v=jHG_I... · Posted by u/ksec
criddell · a day ago
Do speaker vibrations not affect the turntable?
JKCalhoun · 20 hours ago
The lower frequencies can, yeah. Some turntables are better than others though. It does make sense for turntables though to have a separate sub on the floor — the full-range drivers are not a problem for the turntable at least.
JKCalhoun commented on Privately-Owned Rail Cars   amtrak.com/privately-owne... · Posted by u/jasoncartwright
TylerE · 2 days ago
The people doing this at this point are mostly rich rail enthusiasts. No one is doing this to actually get around. The most popular routes are the more scenic ones, like through the mountains. They’re not hitching a car into the Acela to go from NYC to Boston.
JKCalhoun · a day ago
I'm not sure that is true — I mean the rich part is true, but not necessarily the rail enthusiast part. One of the times we took the California Zephyr there was a private car on the end that I understood to be some sports-team tycoon who was more or less afraid of flying.
JKCalhoun commented on Elegant mathematics bending the future of design   actu.epfl.ch/news/elegant... · Posted by u/robinhouston
mkl · 2 days ago
They didn't show it because it doesn't use this C-Tube technique.
JKCalhoun · a day ago
It looks like the dome could be related to the example they show of "optimized network" organization of C-tubes — if, that is, the structure that comprises the dome webbing is comprised of C-tubes.

u/JKCalhoun

KarmaCake day19003May 26, 2016
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