[HN Gopher] Color-Perception-Guided Display Power Reduction for ...
       ___________________________________________________________________
        
       Color-Perception-Guided Display Power Reduction for Virtual Reality
        
       Author : ibobev
       Score  : 35 points
       Date   : 2022-09-26 09:53 UTC (1 days ago)
        
 (HTM) web link (www.immersivecomputinglab.org)
 (TXT) w3m dump (www.immersivecomputinglab.org)
        
       | bloodyplonker22 wrote:
       | They add a filter which adds a highly noticeable green tint.
       | 
       | In the video, the narrator claims the filter is not noticeable by
       | a high percentage of people, but I find this extremely hard to
       | believe. It looks like the green tint in the city of the original
       | Matrix movie.
        
       | jimrandomh wrote:
       | If I'm understanding correctly, the abstract is a very convoluted
       | way of saying:
       | 
       | Green OLED subpixels use less energy per lumen than red and blue
       | subpixels, so if you're already doing foveated rendering, you can
       | save some additional power by green-shifting the parts of the
       | display outside the foveated region.
       | 
       | (But note that foveated rendering isn't actually used anywhere in
       | practice, and the Quest 2 has an LCD panel not an OLED, so it
       | can't save any power this way.)
        
       | jayd16 wrote:
       | I wonder how this affects the ability to differentiate colors or
       | objects, a not unimportant skill in games. If it just desaturates
       | or tightens the color range, it seems like certain things would
       | stop being differentiable.
       | 
       | Said another way, even if the color transition is imperceptible,
       | it might have noticeable effects.
       | 
       | A more complex approach might need to keep higher fidelity color
       | around the edge of objects or some such thing.
        
         | scratcheee wrote:
         | I believe they do not alter the colour in the region being
         | focused on, they're trying to take advantage of the fact that
         | our peripheral vision is primarily rod-based, and thus unable
         | to discern colour.
         | 
         | So in theory, assuming the display can keep up with eye
         | movements, it should never show you a tightened or limited
         | colour range that you are actually capable of detecting through
         | your eyes.
         | 
         | I suspect it'll be subtly detectable in a couple of ways
         | though, either through rapid eye movements (though I admit I
         | have no clue how fast eye tracking/screen response can be), and
         | secondly (more confidently) that your nose will shine green in
         | the reflected glow of all the green pixels they're cleverly
         | shining where you can't see them directly, and you can
         | definitely see your nose.
        
           | PretzelPirate wrote:
           | > and you can definitely see your nose.
           | 
           | I don't use a Quest headset, but on the HP Reverb G2, you
           | can't see your nose at all as long as the face gasket is
           | being properly worn.
        
       ___________________________________________________________________
       (page generated 2022-09-27 23:02 UTC)