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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. foone‏ @Foone Jul 3

      You want to know something about how bullshit insane our brains are? OK, so there's a physical problem with our eyes: We move them in short fast bursts called "saccades", right? very quick, synchronized movements. The only problem is: they go all blurry and useless during this

      703 replies 27,759 retweets 71,039 likes
      Show this thread
      Rich Felker‏ @RichFelker Jul 3
      Replying to @Foone @dev_console

      I feel like there are huge advances to be made in VR by reverse engineering the eyes and the brain's visual processing on a deeper level. Can probably get better, more realistic experience at less than 10% of current rendering cost.

      5:26 PM - 3 Jul 2018
      • 11 Retweets
      • 178 Likes
      • DSA chaos dracolich working group nnnnnn Mardoqueo Sueldo Cryptarchy *Death to Bears* Hawthorn H. Wright Arvind Jairam David M Miller Delan Azabani Ieva SauciuNIGHTMARE 🎃
      8 replies 11 retweets 178 likes
        1. New conversation
        2. foone‏ @Foone Jul 3
          Replying to @RichFelker @dev_console

          Yup! And Some forms of it are being worked on. Foveated rendering, for example, is a trick where you put an eye-tracker in the headset, and only render at max quality where the user is looking. Everywhere else can be low quality.

          4 replies 16 retweets 329 likes
        3. Rich Felker‏ @RichFelker Jul 3
          Replying to @Foone @dev_console

          What kind of latency requirement is there for delivering the hq version?

          6 replies 1 retweet 30 likes
        4. foone‏ @Foone Jul 3
          Replying to @RichFelker @dev_console

          I'm not sure! VR isn't really my thing, but it's gotta be pretty low latency to start with just to keep the VR from getting dizzy, I think.

          3 replies 1 retweet 41 likes
        5. Find me on Mastodon‏ @AmyDentata Jul 3
          Replying to @Foone @RichFelker @dev_console

          There's a company doing a simple version of this right now, without the eye tracking. It's two screens blended together. The center of each eye view is high pixel density, the outer second screen is lower pixel density. Super cool

          2 replies 3 retweets 45 likes
        6. Rich Felker‏ @RichFelker Jul 4
          Replying to @AmyDentata @Foone @dev_console

          That's got to be comparably nauseating to low-abbe eyeglasses.

          1 reply 0 retweets 0 likes
        7. Find me on Mastodon‏ @AmyDentata Jul 4
          Replying to @RichFelker @Foone @dev_console

          Why's that?

          1 reply 0 retweets 0 likes
        8. Rich Felker‏ @RichFelker Jul 4
          Replying to @AmyDentata @Foone @dev_console

          Because whether something is clear or blurred/fringed is a function of whether your eyeballs are pointed at the center of the lens/display or at the edges.

          1 reply 0 retweets 1 like
        9. Find me on Mastodon‏ @AmyDentata Jul 4
          Replying to @RichFelker @Foone @dev_console

          Oh I see. Yeah it's a little weird and subpar. But it's what we've got for now. Foveated rendering would require *ridiculously* low latency times. It'll be fun watching people try.

          0 replies 0 retweets 0 likes
        10. End of conversation
        1. New conversation
        2. David M Miller‏ @david_m_miller Jul 3
          Replying to @RichFelker @Foone @dev_console

          for real, good point, huge advances in audio compression were made with better understanding of auditory perception.

          1 reply 0 retweets 0 likes
        3. foone‏ @Foone Jul 3
          Replying to @david_m_miller @RichFelker @dev_console

          Yeah. That's basically the big idea behind MP3! You basically simulate what parts of the sound data humans can hear (called "perceptual coding") and then toss out the rest.

          1 reply 0 retweets 0 likes
        4. Rich Felker‏ @RichFelker Jul 3
          Replying to @Foone @david_m_miller @dev_console

          MP3 psychoacoustics turned out to be junk (likely thrown in just for patent purposes). At tolerable bitrates, just disabling them gives better quality.

          2 replies 0 retweets 1 like
        5. foone‏ @Foone Jul 3
          Replying to @RichFelker @david_m_miller @dev_console

          Oh, interesting! I hadn't heard that.

          1 reply 0 retweets 0 likes
        6. Rich Felker‏ @RichFelker Jul 3
          Replying to @Foone @david_m_miller @dev_console

          I'm not familiar with any published work on it, but that was my experience using LAME and seemed to agree with others'. Also matched my experience with similar pre-encode tricks on video - ...

          1 reply 0 retweets 0 likes
        7. Rich Felker‏ @RichFelker Jul 3
          Replying to @RichFelker @Foone and

          That is, perceptually half-decent at really low bitrates but worse/noticeably artifacted at good ones.

          0 replies 0 retweets 0 likes
        8. End of conversation
        1. New conversation
        2. Wrathful Savior‏ @WrathfulSavior Jul 4
          Replying to @RichFelker @Foone @dev_console

          The real zest is in bypassing the eyes altogether. Surely there are more effective uses for that bandwidth. Bionic eyes or VR bypass are da wae

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker Jul 6
          Replying to @WrathfulSavior @Foone @dev_console

          No, this is why you communicate over well-defined protocols rather than plugging firewire into random shit. It's not about efficiency but who has control over how data stream is interpreted.

          1 reply 0 retweets 2 likes
        4. Wrathful Savior‏ @WrathfulSavior Jul 6
          Replying to @RichFelker @Foone @dev_console

          Yeah Videodrome wasn't such a bad deal, suit yourself

          0 replies 0 retweets 0 likes
        5. End of conversation
        1. New conversation
        2.  ❌ William Strunk, Jr.  ❌‏ @cdrusnret Jul 4
          Replying to @RichFelker @Foone @dev_console

          During research on helmet displays where non-visible spectra or time lagged remote images are being processed, the processing & rendering time lag induces severe nausea when the operator turns his head. The brain's saccade hack can't cope with the VR response delay.

          1 reply 0 retweets 1 like
        3. Jason Renaud‏ @renaud_pdx Jul 5
          Replying to @cdrusnret @RichFelker and

          Thank goodness. Our brains refuse to be dupes for military robotics. Science - no, scientists - highly over rated.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. Bjorn Stahl‏ @CrazyLogLad Jul 4
          Replying to @RichFelker @Foone @dev_console

          Even more hardcore things than that - https://www.youtube.com/watch?v=eDk4HrEtGrM … exploiting the blind period to reorient the VR world to prevent you from bumping into things in the real one.

          0 replies 0 retweets 1 like
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