12 ms·

There oughta be a bullet time video booth

414 points by _Microft 3y ago

newman8r 3y ago
You could probably set this up at county fairs and charge 20 bucks a pop. really cool setup.
- _Microft 3y ago
  The creator of this is also the person behind Phyphox, an app that turns your smartphone into tool to conduct physics experiments with and collect data from them, creator of a Game Boy WiFi cartridge and GB Interceptor that allows to record videos of Game Boy games - among other things. Amazing what some people do, isn't it? https://phyphox.org/ https://phyphox.org/ https://github.com/Staacks/wifi-game-boy-cartridge https://github.com/Staacks/wifi-game-boy-cartridge https://github.com/Staacks/gbinterceptor https://github.com/Staacks/gbinterceptor
  - bentcorner 3y ago
    Phyphox is such a cool tool. The acceleration spectrogram is so cool to look at - you can put your phone top of your PC/laptop and measure the RPM of fans and spinning drives.
    - maicro 3y ago
      Agreed, thank you and the parent comment here for the mention of it - looks great, works great with the little bit of experimentation I've done so far.
Wistar 3y ago
Pinnacle Effects in Spokane, WA did this for an ABC Sports Baseball promo in the late 80s using 60 point-and-shoot film cameras arranged in a 360° ring. Gerry Cook was the director and the guy who came up with the idea and physically created the “ring cam” as he called it. It was used to create a 2 second, 60 frame, scene of a pitch being thrown. The resulting shot was a little choppy but novel.
- thih9 3y ago
  Is there a video of this somewhere?
  - Wistar 3y ago
    I really don't know. There are a few pieces that Pinnacle did on YouTube — the "pinball machine" ABC Monday Night Football open, for example — but it seems most did not survive or are not publicly available. EDIT: Turns out that the director, Gerry Cook, has a youtube channel with quite a bit of his work shown there. In particular, there is a Heck Yes Productions demo reel, where at 1:50, there is a ring cam shot of a girl jumping rope. It is very similar to the ABC Baseball ring shot but done in the weeks following the baseball shot. https://youtu.be/6iY86yYp0h4 https://youtu.be/6iY86yYp0h4
    - thih9 3y ago
      That’s an amazing shot and an impressive find too, thanks for sharing!
fsckboy 3y ago
this is the "bullet time" effect (in the Matrix, when Trinity karate-jump-kicks and rotates in air) https://www.factinate.com/wp-content/uploads/2017/02/trinity.gif https://www.factinate.com/wp-content/uploads/2017/02/trinity... This camera setup for personal social events is a great idea, I wonder if it could be done with some sort of phone app so among a group of friends or at a party you could use everybody's cell phone. in watching the video though, I found it a little disappointing. I think people need help with choreography, what actions and timing are going to make for good shifts in perspective. For example, you want grandma to rotate in mid air, not something she throws up. Another example, I think you want the action to start from the periphery, and then bring the characters in the shot "into the spotlight" so the clip delivers a climax or "keeps getting better". (although, he did use the "move away from the action" technique to good effect to create transition places to stitch together a series of clips into a sequence https://there.oughta.be/assets/images/2023-05-26/demo-blog.mp4 https://there.oughta.be/assets/images/2023-05-26/demo-blog.m... ) And could it be done using video instead of still shots? seems like turning raw footage into something interesting would be easier? Or is that how it works anyway?
Animats 3y ago
He's using digital single-lens reflex cameras with moving mirrors in an application where you don't need that, but do need a good camera. What do you use today when you need a good camera with no user interface?
- zh3 3y ago
  A Pi HQ camera with a lens of your choice. It's easy to synchronise any number of Pi cameras together, and with the RAM on them each camera can store a long sequence of frames (add an RF-trigger flash using BBC microbits to each one to control motion blur).
  - Animats 3y ago
    That's a component. It needs packaging.[1] That bulky lens needs support that's reasonably rigid and resistant to vibration. Four 2.5mm screws on the PC board of the sensor are not enough. Support needs to be near the center of gravity. In the original article, the author describes his camera mounting problems. [1] https://www.tomshardware.com/reviews/raspberry-pi-high-quality-camera https://www.tomshardware.com/reviews/raspberry-pi-high-quali...
- Galaxeblaffer 3y ago
  define good camera. it's a bit weird because it often turns out that cameras with user interfaces are cheaper because of economy of scales. that being said, a market for almost barbone sensors on pcb's seems to be building and is lead by raspberry pi's camera modules, where the hq module has a reasonably sized sensor but is still a far cry from mft, aps-c and full frame sizes. the hq camera is almost on parity with most phones. from there it pretty much moves into cameras with ui's but controllable with some kind of vendor sdk or libgphoto. i imagine it's a matter of economy of scale and it's almost impossible to buy a good almost barbone sensor. If it's even possible e.g. the 61mp ff sensor used in the Sony a7rV is available almost barbone for astro photography, it's still very expensive. i imagine there's a pretty big market for all kinds of industrial cameras but from tip toeing into that, it seems very very very expensive.
  - 3y ago
michaelgiba 3y ago
NeRF + a few cameras in an array could probably get you there
MontyCarloHall 3y ago
That camera had an MSRP of $899 when it was new in 2006 [0]. Amazing that they now sell for only £50, and still take fantastic pictures even by today's standards [1]. Technological progress is nothing short of remarkable. [0] https://kenrockwell.com/canon/rebel-xti.htm https://kenrockwell.com/canon/rebel-xti.htm [1] https://onfotolife.com/camera_sample_photos?camera_id=30&page=1&iso_min=0&iso_max=65535 https://onfotolife.com/camera_sample_photos?camera_id=30&pag...
- TrainedMonkey 3y ago
  Even more impressive when you account for 50% USD inflation since 2006: https://www.in2013dollars.com/us/inflation/2006 https://www.in2013dollars.com/us/inflation/2006
- estebank 3y ago
  It is a great moment for people that want to get into photography, because the market is moving to mirrorless but there's plenty of old high end DSLR gear that people are getting rid of but that can produce excellent pictures. The important part of the gear is the lenses, and those can be had used for a fraction of the cost of new ones. For the bodies, the sensor quality has consistently improved over the years, but the quality of 35mm at ISO 100 has been matched and surpassed a long time ago. As a first approximation, you can say that about 10 Megapixels are enough to match film[1]. Subjectively you could say that digital matches and exceeds film since around the mid-2000s.[2] Anything newer than the D2 will be more than enough for any hobbyist. The subsets of photography that benefit from the improvements of the past two decades are low light photography (birding), sports (if you can shoot 9fps and the pal next to you can shoot 11fps, they are the ones more likely to get paid for the picture) and videography (both due to quality of the recorded video as well as ease of use, like better auto-focus). [1]: https://photo.stackexchange.com/questions/30745/what-is-the-equivalent-resolution-of-a-35mm-film https://photo.stackexchange.com/questions/30745/what-is-the-... [2]: https://www.youtube.com/watch?v=ThpQWhOfKO4 https://www.youtube.com/watch?v=ThpQWhOfKO4
  - gmiller123456 3y ago
    Why do you think the market is moving to mirrorless? I remember there was a craze when they first came out, but died out in a couple years. There still are a lot of good and "good for the price" mirrorless cameras available, but they certainly don't seem to be taking over the market. As an active photographer, I still see most people using DSLRs or their phone. Actually, everyone I know who bought into mirrorless actually gave it up. Back when they were popular I did look into getting one. But there were too many competing lens mounts, and not enough good lenses. So you could buy in to one mount only to have a different mount take over the market, or have yours go away.
albroland 3y ago
There already is a company that rents out a system like this called the A-1 Array: https://www.array.cam/ https://www.array.cam/ I first saw this at an art installation in Brooklyn in 2017.
- aidenn0 3y ago
  That subtends a much lower angle. Also the "acceleration" and alternating mirroring in TFA to give the illusion of a 180 degree spin is a brilliant idea.
- tootie 3y ago
  We leased this one for a few months for a project. It works pretty well. We priced several competitors too. There's not a ton but there's a few.
- elicash 3y ago
  In the original video, he says he needs the wall to achieve the looping effect. But in this case, what's the reason it seems to need to be indoor, or within some kind of booth?
qup 3y ago
Seems a good place to ask: anyone know a good tutorial for building your own diy photo booth?
- internetter 3y ago
  I quite like this one. It's crafty and cute https://hackaday.com/2019/12/22/build-a-dslr-photo-booth-the-easy-way/ https://hackaday.com/2019/12/22/build-a-dslr-photo-booth-the..., though there's no printing. It's not abundantly hard to bang together something functional, really. It's one of those projects where you just think about the components you have (Camera, Monitor), and then make an enclosure (or find 3d/laser files), then some code that's surely on github to sync them together.
  - lostgame 3y ago
    A small printer, though; would turn it from a novelty into something you could e.g. install in a store you owned, and even if you just charged a buck a go it could still be a fun draw. Got me thinking now what a tiny printing solution like that would/could look like! EDIT: unsurprisingly, there’s a bunch of iOS/iPadOS solutions. You could theoretically base it off a custom app on an iPad with one of these iThing printers stuffed away and use Square as a POS?
jaywalk 3y ago
This type of photo/video booth is widely available for rental these days.
- spuz 3y ago
  I just looked them up and you are right. It varies from 5 cameras to hundreds of cameras. Interestingly though, I haven't seen any of them demo the continuous rotation through a wall effect that Sebastian shows here though which kind of makes the professional solutions feel like they have some room for improvement.
thedougd 3y ago
A similar effect is achieved with a platform and a camera on an arm rapidly rotating around the platform. I've seen it at tech conferences. I think this is it: https://spinpix360.com/ https://spinpix360.com/
- inconceivable 3y ago
  this is interesting but it doesn't have the time freeze or slo mo effect done with a rapid series of photos.
  - thedougd 3y ago
    Not a total freeze, but it had slow motion. I thought it was a clever approximation. You can see it here: https://www.youtube.com/watch?v=SXhlfWOl0_Y&t=50 https://www.youtube.com/watch?v=SXhlfWOl0_Y&t=50 Not quite as many radians without the subject moving as you would with the real thing.
- deleted 3y ago
  [deleted]
- joshspankit 3y ago
  Wedding guests + drinks + a platform with a rapidly-spinning arm: not advisable
- Tepix 3y ago
  You can get an Insta360 camera with the bullet-time-handle and an invisible selfie stick to get a similar effect.
ziml77 3y ago
Nice, but aren't the cameras supposed to be triggered in sequence instead of all at once? I thought there was still a little bit of motion in the movies, but in these the subjects all freeze in place.
- moffkalast 3y ago
  One would think the cameras all record at the same time and you can just pan around and adjust speed whenever?
  - dwringer 3y ago
    In theory the idea also enables a higher frame rate than that of which the cameras are individually capable, thus allowing a finer slow motion effect.
    - bee_rider 3y ago
      A nice compromise (since a wedding photo booth isn’t going to be super choreographed) could be to group the cameras in to, say, two groups. Trigger them periodically, 180 degrees out of phase with their neighbors, and assuming the virtual camera is moving by one real camera per frame, you’ve got double the frame rate but can still choose a path in post-processing. And of course it could easily be abstracted out to n camera sets. This is getting pretty complicated though, he “hard-coded” the camera motion into the shape of the frame. Physical things are hard, haha.
  - rtkwe 3y ago
    Depends on the setup you're using the trouble with doing video is to get the effect to be smooth you need frames at very particular times from each location which is tough to ensure out of video equipment where a bank of cameras you can trigger to take a single frame in sequence. To do the same with video you need to have a system to send a slightly out of phase sync signal to each camera in the array or just wing it and fudge the jittery motion and ramping with some VFX in post production.
  - joshspankit 3y ago
tregoning 3y ago
My poor man version of this (using web tech) https://jt.io/posts/bullet-time/ https://jt.io/posts/bullet-time/
- notRobot 3y ago
  This is really cool!
- tomduncalf 3y ago
  So cool!
- dylanowen 3y ago
  This is awesome!
internetter 3y ago
I'm usually a big critic of AI, and I remember seeing people complaining years ago about increasing framerates with AI[0], but maybe this could be a good usecase. You do, say, half the cameras, and then some crafty solution to interpolate (filling in the edges with AI, some sort of angle adjust) [0]: https://www.youtube.com/watch?v=_KRb_qV9P4g https://www.youtube.com/watch?v=_KRb_qV9P4g
- estebank 3y ago
  The project already used frame interpolation (through DaVinci Resolve) to double the number of frames in the video. Plus a low-tech "inside the wall" panned and blurred frame. Given the set-up, fancier scene reconstruction to build a 3D model of the environment could be combined with texture reprojection to improve the interpolation and allow the "inside the wall" frame to be perspective corrected, but that would be much more involved on the software side than what was done here (and beyond what I could do too).
- zoogeny 3y ago
  The tech to look out for in this space is called NeRF (Neural Radiance Fields). Just do a quick search on that term and you will find a whole bunch of videos that reconstruct 3d scenes using digital stills. I just saw a paper a couple of days ago showing advances in reconstructing human expressions that change over time using advanced techniques.
  - riotnrrd 3y ago
    Yeah, the Frugal Man's Bullet-time is a DSLR, Instant NGP from NVIDIA, and COLMAP.
- 7373737373 3y ago
  I want to show the creator this specific video on DAIN (Depth-Aware Video Frame Interpolation): https://youtu.be/sFN9dzw0qH8 https://youtu.be/sFN9dzw0qH8 ! https://github.com/baowenbo/DAIN https://github.com/baowenbo/DAIN
renewiltord 3y ago
This is a bonkers idea! I fucking love it, man! I bet I could do this with a single device on a rail and use NeRFs to actually make the effect. Could even do more complex camera flight. Love the idea.
PicassoCTs 3y ago
Could this be done with a drone swarm? Every drone follows a spline, the cameras synced on a target?
lostgame 3y ago
During the Pride festival in Toronto last year I swear they actually had something like this! I fully remember I left for the bathroom and came back to my girlfriend and her bestie doing it, it was like you stood in the Center of the platform and the cameras rotated around or something? I wish I could remember it more specifically, and it wasn’t perfect; but it struck me as strange that this was the first time I’d actually seen anyone even try! Wish now I’d written down the company who was putting it on. It looked neat. :)
weinzierl 3y ago
The Insta360 can do bullet time video with minimal effort. Ok, it's no exactly the same as known from Matrix, but considering the simplicity it is pretty cool.
- thih9 3y ago
  I didn't know what "simplicity" meant in this context, I looked at a tutorial [1] and saw instructions to swing the camera on a string, that's indeed surprisingly simple! [1]: https://www.insta360.com/support/supportcourse?post_id=9466 https://www.insta360.com/support/supportcourse?post_id=9466
danielvf 3y ago
Here's a cutting edge modern take using GoPros and NeRF techniques. https://twitter.com/Arata_Fukoe/status/1660980297352224769 https://twitter.com/Arata_Fukoe/status/1660980297352224769
thih9 3y ago
Related topic, wiggle stereoscopy: https://en.wikipedia.org/wiki/Wiggle_stereoscopy https://en.wikipedia.org/wiki/Wiggle_stereoscopy And there was a lens for this kind of effect, it allowed capturing three images at once [1] [2]. There were also dedicated cameras [3]. > Using its four lenses, four images from slightly different viewing angles were taken simultaneously. With the individual images half the size of the usual 35mm image frames, each 3D photograph taken used the space of 2 full 35mm exposures on the film. So a roll labeled as "36 exposures" would yield 18 3D pictures with four images each. [1]: https://www.dpreview.com/news/1238704821/this-3d-printed-lens-lets-you-create-wigglegrams https://www.dpreview.com/news/1238704821/this-3d-printed-len... [2]: https://www.georgemoua.com/store/d9000-fe-3d-stereoscopic-wiggle-lens-for-full-frame-sony-e https://www.georgemoua.com/store/d9000-fe-3d-stereoscopic-wi... [3]: https://en.wikipedia.org/wiki/Nimslo https://en.wikipedia.org/wiki/Nimslo
unfunco 3y ago
I went to the Monza F1 GP in 2019 and they had a bullet-time video tent sort of thing, with a trampoline in the middle if I remember correctly, it was free to use in the fan zone.
jcelerier 3y ago
> In case you never heard of it: The bullet time effect was famously introduced with the movie “The Matrix” from 1999. actually I think one can already see it in this ad from 1996: https://www.youtube.com/watch?v=qbOGJy3P6rA https://www.youtube.com/watch?v=qbOGJy3P6rA
- stuxnet79 3y ago
  I always assumed this was pioneered by Hong Kong action cinema?
doctorhandshake 3y ago
Brooklyn’s Super A-OK has productized this: https://superaok.com/ https://superaok.com/
kersplody 3y ago
The challenge here is cost. You need 20-40 perspectives at ~$1000 bucks each including the camera body, lens, trigger system, remote download, and output pipeline. So a hand built cost optimized system will cost $20k - $40k in hardware. Operating is also kinda painful: calibration of each camera is required every time the rig is moved or exposure is adjusted and all shots must be designed ahead of time. It's just kinda a limited market due to the complexity and cost. Neural Holography should arrive to market within the the next 6 months, which will allow for any frame to be seen at any angle with as few as 20 cameras for 360° x 180° coverage, allowing for bullet time shots to be designed after the fact with the added bonus of having cinematic quality 3D live action content for use in VR and other 3D environments.
thepasswordis 3y ago
This already exists and people rent them out for weddings and parties and stuff like that: https://www.youtube.com/watch?v=qTlpwIhcSHQ https://www.youtube.com/watch?v=qTlpwIhcSHQ
travbrack 3y ago
This exists. https://bigfreeze.com/projects https://bigfreeze.com/projects - They have one at the Pacific Science Center in Seattle: https://podcam.net/pacsci/ https://podcam.net/pacsci/
jbverschoor 3y ago
There was one of the Witcher on comicon a few years ago
araes 3y ago
Make the equivalent of an an LED strip light that is just a bunch of cell phone cameras at regular intervals and a controller that can trigger and capture from each treating them all like a single camera independent frames. Strip light can then be put into any flexible pattern you want and strung pretty much wherever, or taped to pretty much any location. Whole thing could probably have almost the same electronics size as one of those common color changing LED strips.
krebby 3y ago
You can often find a camera attached to a motion controlled robot arm on the red carpet these days, going back a few years now: https://petapixel.com/2019/02/28/this-robot-shoots-stunning-slow-mo-portraits-on-red-carpets/ https://petapixel.com/2019/02/28/this-robot-shoots-stunning-... The entertainment new channel E! Is well established in this space. I have to wonder at what point a low cost arm is cheaper than an array of cameras.
- geerlingguy 3y ago
  The speed the camera arm would need to move to nearly freeze time is astonishingly fast—if you were to try doing the entire shot on one camera. But I could imagine a setup with a static beginning and end camera, with a motion controlled camera timed to whiz by both so it could ramp up the acceleration. But much cheaper to put a camera on a rail/track instead of complex motion control.
nvella 3y ago
There was a similar installation at the Australian Centre for the Moving Image, Melbourne in 2015. Not sure if it’s still there, at least when I was there last it emailed your video in FLV so I gather the setup was pretty dated.
gecko39 3y ago
Here is a similar idea using 15 iPhones + NeRF rendering to make a bullet time video https://labs.laan.com/blogs/slow-motion-bullet-time-with-nerf-neural-radiance-fields https://labs.laan.com/blogs/slow-motion-bullet-time-with-ner...
- discordance 3y ago
  Link 1: “My cousin was getting married last month, and we were doing a family photo shoot for the occasion” Link 2: “ For my cousin’s wedding I did not make a photo booth but a video booth.” That’s n = 2 for cousins getting married inspiring bullet cam implementations.
  - mattigames 3y ago
    I'm eagear for the sequel, divorce bullet time, it may not be appreciated by any of the subject but is hard to argue that mid-air tears in bullet time would be quite a sight to see.
ineedasername 3y ago
These actually exist. My kids’ local grammar school rented one out for a sort of field-day event where parents could come too. A staff person from the rental outfit operated it. It was a single camera that rapidly spun around a small central platform, and at the end you entered your cell # and received a text message to view & download the result.
jodrellblank 3y ago
Is there a way to make a cheapskate version using multiple mirrors and only one camera looking at all of them at once? Then chopping the single capture into smaller frames one bit for each mirror, each with a different view of the subject, and stitch them into a video. I can imagine a 3x1 layout but trying to arrange the mirrors in a curve so the camera sees a 3x3 or 4x4 or 5x5 arrangement might need some optical cleverness.
somethingsome 3y ago
(self plug) If you want to obtain the same effect with way less cameras, 4 maybe, check the paper 'Real-Time Depth Video-Based Rendering for 6-DoF HMD Navigation and Light Field Displays' (Bonatto 2021)[0], the supplementary material contains the video view synthesis [1]and some results can be found on YouTube [2] and finally.. You can do the view synthesis for free using the (MPEG) free software: RVS (reference view synthesizer) [3]. [0] https://ieeexplore.ieee.org/document/9590541 https://ieeexplore.ieee.org/document/9590541 [1] https://ieeexplore.ieee.org/ielx7/6287639/9312710/9590541/ac https://ieeexplore.ieee.org/ielx7/6287639/9312710/9590541/ac... [2] https://youtu.be/ONO_bc6vpf0 https://youtu.be/ONO_bc6vpf0 [3] https://gitlab.com/mpeg-i-visual/rvs https://gitlab.com/mpeg-i-visual/rvs
ChrisArchitect 3y ago
Just saw a service on the weekend that rents out for events with a setup to take fun shots like this. Assume it's more common than this might say. Kind of an update to the 'photo booth' trend.
wcfields 3y ago
I built one of these for a client a few years ago. Bought 10 refurb T2i kits and this software to stitch it together: https://www.breezesys.com/ https://www.breezesys.com/ Here's it in action from: https://insidethemagic.net/2017/07/d23-expo-2017-take-virtual-dive-scrooges-money-bin-ducktales/ https://insidethemagic.net/2017/07/d23-expo-2017-take-virtua...

414 points by _Microft 3y ago

newman8r 3y ago

You could probably set this up at county fairs and charge 20 bucks a pop. really cool setup.

_Microft 3y ago
The creator of this is also the person behind Phyphox, an app that turns your smartphone into tool to conduct physics experiments with and collect data from them, creator of a Game Boy WiFi cartridge and GB Interceptor that allows to record videos of Game Boy games - among other things. Amazing what some people do, isn't it? https://phyphox.org/ https://phyphox.org/ https://github.com/Staacks/wifi-game-boy-cartridge https://github.com/Staacks/wifi-game-boy-cartridge https://github.com/Staacks/gbinterceptor https://github.com/Staacks/gbinterceptor
- bentcorner 3y ago
  Phyphox is such a cool tool. The acceleration spectrogram is so cool to look at - you can put your phone top of your PC/laptop and measure the RPM of fans and spinning drives.
  - maicro 3y ago
    Agreed, thank you and the parent comment here for the mention of it - looks great, works great with the little bit of experimentation I've done so far.

Wistar 3y ago

Pinnacle Effects in Spokane, WA did this for an ABC Sports Baseball promo in the late 80s using 60 point-and-shoot film cameras arranged in a 360° ring. Gerry Cook was the director and the guy who came up with the idea and physically created the “ring cam” as he called it. It was used to create a 2 second, 60 frame, scene of a pitch being thrown. The resulting shot was a little choppy but novel.

thih9 3y ago
Is there a video of this somewhere?
- Wistar 3y ago
  I really don't know. There are a few pieces that Pinnacle did on YouTube — the "pinball machine" ABC Monday Night Football open, for example — but it seems most did not survive or are not publicly available. EDIT: Turns out that the director, Gerry Cook, has a youtube channel with quite a bit of his work shown there. In particular, there is a Heck Yes Productions demo reel, where at 1:50, there is a ring cam shot of a girl jumping rope. It is very similar to the ABC Baseball ring shot but done in the weeks following the baseball shot. https://youtu.be/6iY86yYp0h4 https://youtu.be/6iY86yYp0h4
  - thih9 3y ago
    That’s an amazing shot and an impressive find too, thanks for sharing!

fsckboy 3y ago

this is the "bullet time" effect (in the Matrix, when Trinity karate-jump-kicks and rotates in air) https://www.factinate.com/wp-content/uploads/2017/02/trinity.gif https://www.factinate.com/wp-content/uploads/2017/02/trinity... This camera setup for personal social events is a great idea, I wonder if it could be done with some sort of phone app so among a group of friends or at a party you could use everybody's cell phone. in watching the video though, I found it a little disappointing. I think people need help with choreography, what actions and timing are going to make for good shifts in perspective. For example, you want grandma to rotate in mid air, not something she throws up. Another example, I think you want the action to start from the periphery, and then bring the characters in the shot "into the spotlight" so the clip delivers a climax or "keeps getting better". (although, he did use the "move away from the action" technique to good effect to create transition places to stitch together a series of clips into a sequence https://there.oughta.be/assets/images/2023-05-26/demo-blog.mp4 https://there.oughta.be/assets/images/2023-05-26/demo-blog.m... ) And could it be done using video instead of still shots? seems like turning raw footage into something interesting would be easier? Or is that how it works anyway?

Animats 3y ago

He's using digital single-lens reflex cameras with moving mirrors in an application where you don't need that, but do need a good camera. What do you use today when you need a good camera with no user interface?

zh3 3y ago
A Pi HQ camera with a lens of your choice. It's easy to synchronise any number of Pi cameras together, and with the RAM on them each camera can store a long sequence of frames (add an RF-trigger flash using BBC microbits to each one to control motion blur).
- Animats 3y ago
  That's a component. It needs packaging.[1] That bulky lens needs support that's reasonably rigid and resistant to vibration. Four 2.5mm screws on the PC board of the sensor are not enough. Support needs to be near the center of gravity. In the original article, the author describes his camera mounting problems. [1] https://www.tomshardware.com/reviews/raspberry-pi-high-quality-camera https://www.tomshardware.com/reviews/raspberry-pi-high-quali...
Galaxeblaffer 3y ago
define good camera. it's a bit weird because it often turns out that cameras with user interfaces are cheaper because of economy of scales. that being said, a market for almost barbone sensors on pcb's seems to be building and is lead by raspberry pi's camera modules, where the hq module has a reasonably sized sensor but is still a far cry from mft, aps-c and full frame sizes. the hq camera is almost on parity with most phones. from there it pretty much moves into cameras with ui's but controllable with some kind of vendor sdk or libgphoto. i imagine it's a matter of economy of scale and it's almost impossible to buy a good almost barbone sensor. If it's even possible e.g. the 61mp ff sensor used in the Sony a7rV is available almost barbone for astro photography, it's still very expensive. i imagine there's a pretty big market for all kinds of industrial cameras but from tip toeing into that, it seems very very very expensive.
- 3y ago

michaelgiba 3y ago

NeRF + a few cameras in an array could probably get you there

MontyCarloHall 3y ago

That camera had an MSRP of $899 when it was new in 2006 [0]. Amazing that they now sell for only £50, and still take fantastic pictures even by today's standards [1]. Technological progress is nothing short of remarkable. [0] https://kenrockwell.com/canon/rebel-xti.htm https://kenrockwell.com/canon/rebel-xti.htm [1] https://onfotolife.com/camera_sample_photos?camera_id=30&page=1&iso_min=0&iso_max=65535 https://onfotolife.com/camera_sample_photos?camera_id=30&pag...

TrainedMonkey 3y ago
Even more impressive when you account for 50% USD inflation since 2006: https://www.in2013dollars.com/us/inflation/2006 https://www.in2013dollars.com/us/inflation/2006
estebank 3y ago
It is a great moment for people that want to get into photography, because the market is moving to mirrorless but there's plenty of old high end DSLR gear that people are getting rid of but that can produce excellent pictures. The important part of the gear is the lenses, and those can be had used for a fraction of the cost of new ones. For the bodies, the sensor quality has consistently improved over the years, but the quality of 35mm at ISO 100 has been matched and surpassed a long time ago. As a first approximation, you can say that about 10 Megapixels are enough to match film[1]. Subjectively you could say that digital matches and exceeds film since around the mid-2000s.[2] Anything newer than the D2 will be more than enough for any hobbyist. The subsets of photography that benefit from the improvements of the past two decades are low light photography (birding), sports (if you can shoot 9fps and the pal next to you can shoot 11fps, they are the ones more likely to get paid for the picture) and videography (both due to quality of the recorded video as well as ease of use, like better auto-focus). [1]: https://photo.stackexchange.com/questions/30745/what-is-the-equivalent-resolution-of-a-35mm-film https://photo.stackexchange.com/questions/30745/what-is-the-... [2]: https://www.youtube.com/watch?v=ThpQWhOfKO4 https://www.youtube.com/watch?v=ThpQWhOfKO4
- gmiller123456 3y ago
  Why do you think the market is moving to mirrorless? I remember there was a craze when they first came out, but died out in a couple years. There still are a lot of good and "good for the price" mirrorless cameras available, but they certainly don't seem to be taking over the market. As an active photographer, I still see most people using DSLRs or their phone. Actually, everyone I know who bought into mirrorless actually gave it up. Back when they were popular I did look into getting one. But there were too many competing lens mounts, and not enough good lenses. So you could buy in to one mount only to have a different mount take over the market, or have yours go away.

albroland 3y ago

There already is a company that rents out a system like this called the A-1 Array: https://www.array.cam/ https://www.array.cam/ I first saw this at an art installation in Brooklyn in 2017.

aidenn0 3y ago
That subtends a much lower angle. Also the "acceleration" and alternating mirroring in TFA to give the illusion of a 180 degree spin is a brilliant idea.
tootie 3y ago
We leased this one for a few months for a project. It works pretty well. We priced several competitors too. There's not a ton but there's a few.
elicash 3y ago
In the original video, he says he needs the wall to achieve the looping effect. But in this case, what's the reason it seems to need to be indoor, or within some kind of booth?

qup 3y ago

Seems a good place to ask: anyone know a good tutorial for building your own diy photo booth?

internetter 3y ago
I quite like this one. It's crafty and cute https://hackaday.com/2019/12/22/build-a-dslr-photo-booth-the-easy-way/ https://hackaday.com/2019/12/22/build-a-dslr-photo-booth-the..., though there's no printing. It's not abundantly hard to bang together something functional, really. It's one of those projects where you just think about the components you have (Camera, Monitor), and then make an enclosure (or find 3d/laser files), then some code that's surely on github to sync them together.
- lostgame 3y ago
  A small printer, though; would turn it from a novelty into something you could e.g. install in a store you owned, and even if you just charged a buck a go it could still be a fun draw. Got me thinking now what a tiny printing solution like that would/could look like! EDIT: unsurprisingly, there’s a bunch of iOS/iPadOS solutions. You could theoretically base it off a custom app on an iPad with one of these iThing printers stuffed away and use Square as a POS?

jaywalk 3y ago

This type of photo/video booth is widely available for rental these days.

spuz 3y ago
I just looked them up and you are right. It varies from 5 cameras to hundreds of cameras. Interestingly though, I haven't seen any of them demo the continuous rotation through a wall effect that Sebastian shows here though which kind of makes the professional solutions feel like they have some room for improvement.

thedougd 3y ago

A similar effect is achieved with a platform and a camera on an arm rapidly rotating around the platform. I've seen it at tech conferences. I think this is it: https://spinpix360.com/ https://spinpix360.com/

inconceivable 3y ago
this is interesting but it doesn't have the time freeze or slo mo effect done with a rapid series of photos.
- thedougd 3y ago
  Not a total freeze, but it had slow motion. I thought it was a clever approximation. You can see it here: https://www.youtube.com/watch?v=SXhlfWOl0_Y&t=50 https://www.youtube.com/watch?v=SXhlfWOl0_Y&t=50 Not quite as many radians without the subject moving as you would with the real thing.
deleted 3y ago
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joshspankit 3y ago
Wedding guests + drinks + a platform with a rapidly-spinning arm: not advisable
Tepix 3y ago
You can get an Insta360 camera with the bullet-time-handle and an invisible selfie stick to get a similar effect.

ziml77 3y ago

Nice, but aren't the cameras supposed to be triggered in sequence instead of all at once? I thought there was still a little bit of motion in the movies, but in these the subjects all freeze in place.

moffkalast 3y ago
One would think the cameras all record at the same time and you can just pan around and adjust speed whenever?
- dwringer 3y ago
  In theory the idea also enables a higher frame rate than that of which the cameras are individually capable, thus allowing a finer slow motion effect.
  - bee_rider 3y ago
    A nice compromise (since a wedding photo booth isn’t going to be super choreographed) could be to group the cameras in to, say, two groups. Trigger them periodically, 180 degrees out of phase with their neighbors, and assuming the virtual camera is moving by one real camera per frame, you’ve got double the frame rate but can still choose a path in post-processing. And of course it could easily be abstracted out to n camera sets. This is getting pretty complicated though, he “hard-coded” the camera motion into the shape of the frame. Physical things are hard, haha.
- rtkwe 3y ago
  Depends on the setup you're using the trouble with doing video is to get the effect to be smooth you need frames at very particular times from each location which is tough to ensure out of video equipment where a bank of cameras you can trigger to take a single frame in sequence. To do the same with video you need to have a system to send a slightly out of phase sync signal to each camera in the array or just wing it and fudge the jittery motion and ramping with some VFX in post production.
- joshspankit 3y ago

tregoning 3y ago

My poor man version of this (using web tech) https://jt.io/posts/bullet-time/ https://jt.io/posts/bullet-time/

notRobot 3y ago
This is really cool!
tomduncalf 3y ago
So cool!
dylanowen 3y ago
This is awesome!

internetter 3y ago

I'm usually a big critic of AI, and I remember seeing people complaining years ago about increasing framerates with AI[0], but maybe this could be a good usecase. You do, say, half the cameras, and then some crafty solution to interpolate (filling in the edges with AI, some sort of angle adjust) [0]: https://www.youtube.com/watch?v=_KRb_qV9P4g https://www.youtube.com/watch?v=_KRb_qV9P4g

estebank 3y ago
The project already used frame interpolation (through DaVinci Resolve) to double the number of frames in the video. Plus a low-tech "inside the wall" panned and blurred frame. Given the set-up, fancier scene reconstruction to build a 3D model of the environment could be combined with texture reprojection to improve the interpolation and allow the "inside the wall" frame to be perspective corrected, but that would be much more involved on the software side than what was done here (and beyond what I could do too).
zoogeny 3y ago
The tech to look out for in this space is called NeRF (Neural Radiance Fields). Just do a quick search on that term and you will find a whole bunch of videos that reconstruct 3d scenes using digital stills. I just saw a paper a couple of days ago showing advances in reconstructing human expressions that change over time using advanced techniques.
- riotnrrd 3y ago
  Yeah, the Frugal Man's Bullet-time is a DSLR, Instant NGP from NVIDIA, and COLMAP.
7373737373 3y ago
I want to show the creator this specific video on DAIN (Depth-Aware Video Frame Interpolation): https://youtu.be/sFN9dzw0qH8 https://youtu.be/sFN9dzw0qH8 ! https://github.com/baowenbo/DAIN https://github.com/baowenbo/DAIN

renewiltord 3y ago

This is a bonkers idea! I fucking love it, man! I bet I could do this with a single device on a rail and use NeRFs to actually make the effect. Could even do more complex camera flight. Love the idea.

PicassoCTs 3y ago

Could this be done with a drone swarm? Every drone follows a spline, the cameras synced on a target?

lostgame 3y ago

During the Pride festival in Toronto last year I swear they actually had something like this! I fully remember I left for the bathroom and came back to my girlfriend and her bestie doing it, it was like you stood in the Center of the platform and the cameras rotated around or something? I wish I could remember it more specifically, and it wasn’t perfect; but it struck me as strange that this was the first time I’d actually seen anyone even try! Wish now I’d written down the company who was putting it on. It looked neat. :)

weinzierl 3y ago

The Insta360 can do bullet time video with minimal effort. Ok, it's no exactly the same as known from Matrix, but considering the simplicity it is pretty cool.

thih9 3y ago
I didn't know what "simplicity" meant in this context, I looked at a tutorial [1] and saw instructions to swing the camera on a string, that's indeed surprisingly simple! [1]: https://www.insta360.com/support/supportcourse?post_id=9466 https://www.insta360.com/support/supportcourse?post_id=9466

danielvf 3y ago

Here's a cutting edge modern take using GoPros and NeRF techniques. https://twitter.com/Arata_Fukoe/status/1660980297352224769 https://twitter.com/Arata_Fukoe/status/1660980297352224769

thih9 3y ago

Related topic, wiggle stereoscopy: https://en.wikipedia.org/wiki/Wiggle_stereoscopy https://en.wikipedia.org/wiki/Wiggle_stereoscopy And there was a lens for this kind of effect, it allowed capturing three images at once [1] [2]. There were also dedicated cameras [3]. > Using its four lenses, four images from slightly different viewing angles were taken simultaneously. With the individual images half the size of the usual 35mm image frames, each 3D photograph taken used the space of 2 full 35mm exposures on the film. So a roll labeled as "36 exposures" would yield 18 3D pictures with four images each. [1]: https://www.dpreview.com/news/1238704821/this-3d-printed-lens-lets-you-create-wigglegrams https://www.dpreview.com/news/1238704821/this-3d-printed-len... [2]: https://www.georgemoua.com/store/d9000-fe-3d-stereoscopic-wiggle-lens-for-full-frame-sony-e https://www.georgemoua.com/store/d9000-fe-3d-stereoscopic-wi... [3]: https://en.wikipedia.org/wiki/Nimslo https://en.wikipedia.org/wiki/Nimslo

unfunco 3y ago

I went to the Monza F1 GP in 2019 and they had a bullet-time video tent sort of thing, with a trampoline in the middle if I remember correctly, it was free to use in the fan zone.

jcelerier 3y ago

> In case you never heard of it: The bullet time effect was famously introduced with the movie “The Matrix” from 1999. actually I think one can already see it in this ad from 1996: https://www.youtube.com/watch?v=qbOGJy3P6rA https://www.youtube.com/watch?v=qbOGJy3P6rA

stuxnet79 3y ago
I always assumed this was pioneered by Hong Kong action cinema?

doctorhandshake 3y ago

Brooklyn’s Super A-OK has productized this: https://superaok.com/ https://superaok.com/

kersplody 3y ago

The challenge here is cost. You need 20-40 perspectives at ~$1000 bucks each including the camera body, lens, trigger system, remote download, and output pipeline. So a hand built cost optimized system will cost $20k - $40k in hardware. Operating is also kinda painful: calibration of each camera is required every time the rig is moved or exposure is adjusted and all shots must be designed ahead of time. It's just kinda a limited market due to the complexity and cost. Neural Holography should arrive to market within the the next 6 months, which will allow for any frame to be seen at any angle with as few as 20 cameras for 360° x 180° coverage, allowing for bullet time shots to be designed after the fact with the added bonus of having cinematic quality 3D live action content for use in VR and other 3D environments.

thepasswordis 3y ago

This already exists and people rent them out for weddings and parties and stuff like that: https://www.youtube.com/watch?v=qTlpwIhcSHQ https://www.youtube.com/watch?v=qTlpwIhcSHQ

travbrack 3y ago

This exists. https://bigfreeze.com/projects https://bigfreeze.com/projects - They have one at the Pacific Science Center in Seattle: https://podcam.net/pacsci/ https://podcam.net/pacsci/

jbverschoor 3y ago

There was one of the Witcher on comicon a few years ago

araes 3y ago

Make the equivalent of an an LED strip light that is just a bunch of cell phone cameras at regular intervals and a controller that can trigger and capture from each treating them all like a single camera independent frames. Strip light can then be put into any flexible pattern you want and strung pretty much wherever, or taped to pretty much any location. Whole thing could probably have almost the same electronics size as one of those common color changing LED strips.

krebby 3y ago

You can often find a camera attached to a motion controlled robot arm on the red carpet these days, going back a few years now: https://petapixel.com/2019/02/28/this-robot-shoots-stunning-slow-mo-portraits-on-red-carpets/ https://petapixel.com/2019/02/28/this-robot-shoots-stunning-... The entertainment new channel E! Is well established in this space. I have to wonder at what point a low cost arm is cheaper than an array of cameras.

geerlingguy 3y ago
The speed the camera arm would need to move to nearly freeze time is astonishingly fast—if you were to try doing the entire shot on one camera. But I could imagine a setup with a static beginning and end camera, with a motion controlled camera timed to whiz by both so it could ramp up the acceleration. But much cheaper to put a camera on a rail/track instead of complex motion control.

nvella 3y ago

There was a similar installation at the Australian Centre for the Moving Image, Melbourne in 2015. Not sure if it’s still there, at least when I was there last it emailed your video in FLV so I gather the setup was pretty dated.

gecko39 3y ago

Here is a similar idea using 15 iPhones + NeRF rendering to make a bullet time video https://labs.laan.com/blogs/slow-motion-bullet-time-with-nerf-neural-radiance-fields https://labs.laan.com/blogs/slow-motion-bullet-time-with-ner...

discordance 3y ago
Link 1: “My cousin was getting married last month, and we were doing a family photo shoot for the occasion” Link 2: “ For my cousin’s wedding I did not make a photo booth but a video booth.” That’s n = 2 for cousins getting married inspiring bullet cam implementations.
- mattigames 3y ago
  I'm eagear for the sequel, divorce bullet time, it may not be appreciated by any of the subject but is hard to argue that mid-air tears in bullet time would be quite a sight to see.

ineedasername 3y ago

These actually exist. My kids’ local grammar school rented one out for a sort of field-day event where parents could come too. A staff person from the rental outfit operated it. It was a single camera that rapidly spun around a small central platform, and at the end you entered your cell # and received a text message to view & download the result.

jodrellblank 3y ago

Is there a way to make a cheapskate version using multiple mirrors and only one camera looking at all of them at once? Then chopping the single capture into smaller frames one bit for each mirror, each with a different view of the subject, and stitch them into a video. I can imagine a 3x1 layout but trying to arrange the mirrors in a curve so the camera sees a 3x3 or 4x4 or 5x5 arrangement might need some optical cleverness.

somethingsome 3y ago

(self plug) If you want to obtain the same effect with way less cameras, 4 maybe, check the paper 'Real-Time Depth Video-Based Rendering for 6-DoF HMD Navigation and Light Field Displays' (Bonatto 2021)[0], the supplementary material contains the video view synthesis [1]and some results can be found on YouTube [2] and finally.. You can do the view synthesis for free using the (MPEG) free software: RVS (reference view synthesizer) [3]. [0] https://ieeexplore.ieee.org/document/9590541 https://ieeexplore.ieee.org/document/9590541 [1] https://ieeexplore.ieee.org/ielx7/6287639/9312710/9590541/ac https://ieeexplore.ieee.org/ielx7/6287639/9312710/9590541/ac... [2] https://youtu.be/ONO_bc6vpf0 https://youtu.be/ONO_bc6vpf0 [3] https://gitlab.com/mpeg-i-visual/rvs https://gitlab.com/mpeg-i-visual/rvs

ChrisArchitect 3y ago

Just saw a service on the weekend that rents out for events with a setup to take fun shots like this. Assume it's more common than this might say. Kind of an update to the 'photo booth' trend.

wcfields 3y ago

I built one of these for a client a few years ago. Bought 10 refurb T2i kits and this software to stitch it together: https://www.breezesys.com/ https://www.breezesys.com/ Here's it in action from: https://insidethemagic.net/2017/07/d23-expo-2017-take-virtual-dive-scrooges-money-bin-ducktales/ https://insidethemagic.net/2017/07/d23-expo-2017-take-virtua...