bdk Loc: Sanibel Fl.

I recently posted a message about cameras that are so fast they can actually show light as it moves about.something like 10 trillion frames a second
Here is the link https://www.youtube.com/watch?v=7Ys_yKGNFRQ
The question many asked was how do you store all those images.
well I did a search and this is what I came up with. now can anyone actually tell me what it all means???

These cameras use a technique called compressed ultrafast photography (CUP), which combines a streak camera with a digital micromirror device and a computer algorithm123

The basic idea of CUP is to encode the spatial and temporal information of a scene into a single image, and then decode it using a reconstruction algorithm. The streak camera captures the light intensity along one spatial dimension and one temporal dimension, while the digital micromirror device modulates the light along another spatial dimension. The resulting image is a compressed representation of the 3D spatiotemporal data, which can be recovered by solving an inverse problem45

This way, the camera can store the images in a single frame, without needing a very fast data transfer rate or a large storage capacity. However, the trade-off is that the image quality and resolution are limited by the compression ratio and the reconstruction algorithm45

( clear as mud to me)

Retired CPO Loc: Travel full time in an RV

Makes sense to me...NOT!

User ID

Seems that a rapidly spinning mirror array (or digital mimic of same ?!?) is scanning the images across the sensor. This would be an update of a rather old device.

To explain via a film parallel, in a 2000 fps cine camera the film never pauses in the gate for each image. A rotating prism serves as a shutter and is "painting" each frame onto the contunuously rolling film passing thru the gate. About ten minutes worth of film flys thru in just a few seconds. Projected at normal viewing speed its about 100x slow motion

In that film camera, each frame is sequentially discete along the film, just like any cine roll. This new multitrillion fps digital version lands all the images in one frame, but acoarst its not a physical frame so no hey problemo.

All the digital images can (apparently ?) be separated out by the magical problem45 algoriddem which is waaaaaaaaay above my pay grade. Got less than a zero clue on that !

Whole thing kinda reminds me of the Lytro, altho I cant even try to explain how so. The Lytro sorta did focus stepping and stacking with actualy stepping, and then took it all apart for viewing.

srg

The term "Spatial" to me means that contemplating the speed of light send my mind into space. As in "Spacing Out"
And of course "Temporal" is the change in temperature as time passes.

revhen Loc: By the beautiful Hudson

Whatever. I just enjoy without understanding.

jackpinoh Loc: Kettering, OH 45419

Temporal relates to time, not temperature.

JD750 Loc: SoCal

I think he knew that.

Definition Humor: a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter.

dennis2146 Loc: Eastern Idaho

You literally, well kinda, took the exact words out of my mouth/typing fingers. As I was about to type, I think he knew that, I saw your post. Well said.

Dennis

JBRIII

All too many things today require technical educations to understand. Even as a scientist, things outside your area rapidly become magic!
Maybe one of those A.I. programs could explain if asked correctly.

If your interested in data storage, a new telescope being built to do sky surveys will generate more than 10TB of data per night. Much of such data becomes available to anyone, anyone got the cloud storage for say a months worth of data?

User ID

Humor impaired much ?

dennis2146 Loc: Eastern Idaho

Only by time and temperature.

Dennis

MJPerini

A good way to get the jist of that technical explanation is to first think of the relationship of RAW files to say the "Small JPEG" on your camera The raw file may be 30MB, the small JPEG mat be 30KB --a huge loss in quality but the subject is still recognizable.
Multiply that difference by a million or so, and you begin to get an idea of the amount or compression we are talking about. They are recording time and position separately and using algorithms to store that information in a single frame. So they are sacrificing tons of specific information to get a very rough idea of what is happening at the speed of light.
If you remember the original post the images were mostly nondescript blobs of varying shape.
That is not a lot of good information, BUT, it is SOME information visualizing the positional change in a light beam in "real time'........ probably useful for things like the CERN super collider
......The rest of us, not so much right now. But that kind of 'Basic science' is what evolved into our digital sensors etc. So it is interesting to know it is going on.

srg

Wow! thanks for that amazing clarification.
I see that you did not understand the humor.

srg

Thank you JD750