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Imaging at a trillion frames per second | Ramesh Raskar

TED · 3.2M views · 2012-07-26 · 11:02

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Overview

Ramesh Raskar presents femto-photography, a technique that captures a trillion frames per second, fast enough to show light itself moving through a scene. He discusses possible uses such as cameras that see around corners or inside the body.

On Hacker News

HN points to it as the clearest and most striking explanation of femto-photography, with animations that make it easy to follow whenever related imaging stories appear.

Recommended by 1 HN people across 1 months · HN mentions 2012–2019

Topics

Computer vision, speech & NLPFundamental physicsEveryday physics & science demos
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ultrafast imaginglightted talkcomputational imagingnon-line-of-sight

What people said

HorizonXP · 2012-08 · Recommendation

Indeed! You should see time flowing backwards in this YouTube video at this timecode: [VIDEO] Seriously, watch it. Very cool.

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amingilani · 2019-08 · Reference

There was a similar technique discussed in a Ted Talk using femto-photography, which had an animation showing how it was done for an ELI5[0]. The talk contains references future technology to see around corners. This article may have been inspired by the talk, but it certainly makes it much more available for the rest of us. [0]: [VIDEO]

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irisli · 2018-10 · Reference

The team behind the video of the coke bottle has a TED talk that explains it in detail: [VIDEO] Edit: oops I misread your comment

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Sources

Video by TED, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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