Portable Network Graphics (PNG) Specification (Third Edition)
www.w3.org
This document describes PNG (Portable Network Graphics), an extensible file format for the lossless, portable, well-compressed storage of static and animated raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, greyscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits.
  • dormedas@lemmy.dormedas.com
    0·
    6 months ago

    I said in a previous article that this is great, but we should be adopting JPEG-XL as it is current and can now compress pixel-perfect / lossless images better than old PNG. IIRC this revision of the spec doesn’t improve compression yet but it’s coming.

  • Powderhorn@beehaw.orgEnglish
    01·
    6 months ago

    Not seeing how this would affect uptake. Lossless is great for production images, but standard JPEG will do (at low compression) for most Web use cases. Until OS developers coalesce around PNG as a standard (Windows has for screenshots), this is that old standards xkcd.

    Alpha channels are nice and all, but how many end users A) have a need for that and B) understand the underlying concept, let alone implementation?

    • Melody Fwygon@beehaw.org
      0·
      6 months ago

      Alpha channels are critical. The ability to have images have transparency in them is much more useful than you believe it is. Many end users have a need for it, more than they know they do; so this argument really isn’t doing much for your stance supporting PNG. Similarly PNG has supported alpha channels for quite a while.