797
PNG has been updated for the first time in 22 years — new spec supports HDR and animation (www.tomshardware.com)
submitted 1 year ago by to c/technology@lemmy.world
111 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] 1 point 1 year ago (4 children)

I'm not sure you can turn an hdr image into a regular one just by snipping it down to 8 bits per channel and discarding the rest.

I mean it would work but I'm not certain you'll get the best results.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [–] 1 point 1 year ago (3 children)

    it would work

    And that's probably enough. I don't know enough about HDR to know if it would look anything like the artist imagined, but as long as it's close enough, it's fine if it's not optimal. Having things completely break is far less than ideal.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 3 child comments
    •
  • [–] 1 point 1 year ago (2 children)

    You'd probably get some colours that end up being quite off target. But you'll get an image to display. So in the end it depends on how much "not optimal" you're ready to accept.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [–] 1 point 1 year ago* (1 child)

    Right, and it depends on what "quite off target" means. Are we talking about greens becoming purples? Or dark greens becoming bright greens? If the image is still mostly recognizable, just with poor saturation or contrast or whatever, I think it's acceptable for older software.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •
  • [–] 2 points 1 year ago

    So it depends on the specific HDR encoding used, Rec2020 is the most common ones you'll see (It's meant for "pure" setups, i.e. where the source and output are tightly linked, e.g. gaming consoles or blu-ray, or so) and the raw data won't look great. While something like HLG (Hybrid-Log Gamma) is designed for better fallback (As it's meant for TV broadcast, where the output device is "whatever TV the user has"), so should just look dimmer.

    This is a HDR screenshot I took of Destiny 2, which uses Rec2020, tone mapped to SDR

    And here's the raw screenshot data from before tonemapping.

    If the second image had all the right HDR metadata, and the viewer supported it properly, then both images would match.

  • permalink
  • fedilink
  • source
  • parent