[HN Gopher] Netflix Makes Removing Green Screens Easier by Turni...
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       Netflix Makes Removing Green Screens Easier by Turning Actors
       Bright Purple
        
       Author : sohkamyung
       Score  : 6 points
       Date   : 2023-07-10 22:16 UTC (45 minutes ago)
        
 (HTM) web link (gizmodo.com)
 (TXT) w3m dump (gizmodo.com)
        
       | graypegg wrote:
       | I was thinking they were somehow controlling the light so the
       | colour saturation never "peaked" on good cinema grade cameras.
       | That way, it could be colour graded back to normal by turning
       | down the magenta saturation. (I'm no expert, so this is the wrong
       | terminology I bet, but I've messed with the "tint" slider in
       | Apple's Preview.app that does give everything a magenta/purple
       | hue if you crank it up.)
       | 
       | However, this says they're using an ML colourizer tool to un-
       | magenta the image after it's been masked? Why not just invest in
       | ML tools that can make a greenscreen mask for you? I actually
       | think that already exists at a pretty advanced level.
       | (Considering it's already very common on phone cameras and video
       | chat apps, with surprisingly good results)
       | 
       | This seems like a lot of effort to just make the mask layer an
       | "in camera" effect. Maybe there's a good reason for that?
        
         | anileated wrote:
         | It almost never happens in real life so normal photographers
         | don't have to deal with it, but if there is no green color at
         | all (e.g., you mix magenta and blue so your green pixels are
         | all at noise floor) then you cannot bring it back from nothing
         | as you color-balance raw footage. You would have to do some
         | coloring.
         | 
         | However, human perception is such that color is much more
         | subjective than things like artefacts from green screen
         | separation, so it might actually not be a big deal.
        
       | jauntywundrkind wrote:
       | Linus Tech Tips covered their new Blackmagic Ultimate green
       | screen appliance which was a fun trip. $2500.
       | https://youtu.be/_CxkmtBqGn8#t=30
       | 
       | I thought this Purple mention was there too but I'm not seeing
       | it; I know I'd seen in mentioned sometime around then. Already
       | really good performamce from this box even without color hackery.
       | I can definitely see how that purple pale could help aid
       | filtering things down!
        
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       (page generated 2023-07-10 23:02 UTC)