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07/26/2012 05:53:38 PM · #1 |
Light in slow motion
'Ramesh Raskar presents femto-photography, a new type of imaging so fast it visualizes the world one trillion frames per second, so detailed it shows light itself in motion. This technology may someday be used to build cameras that can look âaroundâ corners or see inside the body without X-rays.
Photography is about creating images by recording light. Ramesh Raskar has invented a camera that can photograph light itself as it moves at, well, the speed of light.'
Wow. |
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07/26/2012 07:35:52 PM · #2 |
| WOW! That has blown my mind. Thanks for sharing. |
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07/26/2012 07:35:57 PM · #3 |
| Hey I watched that TED talk earlier today. Pretty cool! |
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07/26/2012 08:48:32 PM · #4 |
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07/26/2012 09:09:32 PM · #5 |
i remember seeing this, not the TED talk, but the same footage, a while back. at least a year or more ago.
interesting nonetheless.
Message edited by author 2012-07-26 21:09:47. |
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07/26/2012 09:28:03 PM · #6 |
What!? My camera is already obsolete?????
Sheesh |
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07/26/2012 10:01:46 PM · #7 |
Originally posted by tanguera:
What!? My camera is already obsolete?????
Sheesh |
no, your video camera is. |
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07/26/2012 10:18:42 PM · #8 |
| in 50 years photoshop will have to correct for spacetime warp |
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07/26/2012 10:27:21 PM · #9 |
Very cool.
Originally posted by LanndonKane:
in 50 years photoshop will have to correct for spacetime warp |
Would that be legal under the advanced ruleset? |
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07/26/2012 10:50:15 PM · #10 |
Originally posted by MarkB:
Very cool.
Originally posted by LanndonKane:
in 50 years photoshop will have to correct for spacetime warp |
Would that be legal under the advanced ruleset? |
i don't think so, because the adjustments would be made in a time loop where the advanced ruleset hasn't even been created yet. |
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07/26/2012 10:56:24 PM · #11 |
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07/27/2012 06:43:02 AM · #12 |
| im still trying to grasp out how this works. how do you freeze the light burst unless your shutter is 1/1000000000000? |
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07/27/2012 08:04:16 AM · #13 |
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07/27/2012 08:12:11 AM · #14 |
Originally posted by mike_311:
im still trying to grasp out how this works. how do you freeze the light burst unless your shutter is 1/1000000000000? |
Didn't he say that was pretty much what was done?
The problem came with how much light was detected at that fast of speeds. So in order to get a usable amount of light, they did the same burst of light thousands (millions?) of times over, overlaying all of the photos until a visible image appeared. |
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07/27/2012 08:19:07 AM · #15 |
| I'll have to watch it again, i thought he said the problem with that was not enough light at those shutter speeds. i struggle with 1/50 indoors at f1.4... |
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07/27/2012 09:06:20 AM · #16 |
Originally posted by MIT:
Can you capture any event at this frame rate? What are the limitations?
We can NOT capture arbitrary events at picosecond time resolution. If the event is not repeatable, the required signal-to-noise ratio (SNR) will make it nearly impossible to capture the event. We exploit the simple fact that the photons statistically will trace the same path in repeated pulsed illuminations. By carefully synchronizing the pulsed illumination with the capture of reflected light, we record the same pixel at the same exact relative time slot millions of times to accumulate sufficient signal. |
//web.media.mit.edu/~raskar/trillionfps/
ETA: Why don't links automatically parse on this site?
Message edited by author 2012-07-27 09:07:19. |
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07/27/2012 10:10:51 AM · #17 |
When I was at MIT, they had just captured a packet of photons travelling across the room in 12 frames.
Pretty cool stuff. |
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