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Participant
August 2, 2018
Answered

PNG image quality superior to JPEG?

  • August 2, 2018
  • 2 replies
  • 793 views

File size aside, isn't PNG superior to jpeg since it is lossless?  I don't see why you'd ever want to use jpeg unless file size was a concern...?

    This topic has been closed for replies.
    Correct answer D Fosse

    That's right, PNG is usually preferable.

    The problem with jpeg is that it's unbelievably effective. It can shrink a file to 2% or so of original size, and most people can't tell the difference. PNG can't beat that.

    For a one-off final delivery, where image quality isn't critical - and let's face it, it often isn't - nothing beats jpeg. It's too effective. And since jpeg is usually good enough, there's no real incentive to replace it with something else.

    If image quality is important, you obviously use TIFF. PNG comes second there too...

    2 replies

    JonathanArias
    Legend
    August 2, 2018

    i stick to .png.

    D Fosse
    Community Expert
    D FosseCommunity ExpertCorrect answer
    Community Expert
    August 2, 2018

    That's right, PNG is usually preferable.

    The problem with jpeg is that it's unbelievably effective. It can shrink a file to 2% or so of original size, and most people can't tell the difference. PNG can't beat that.

    For a one-off final delivery, where image quality isn't critical - and let's face it, it often isn't - nothing beats jpeg. It's too effective. And since jpeg is usually good enough, there's no real incentive to replace it with something else.

    If image quality is important, you obviously use TIFF. PNG comes second there too...

    edh33Author
    Participant
    August 2, 2018

    See, where you say "For a one-off final delivery, where image quality isn't critical..."  I would argue file size isn't critical.  Unless there was a need to keep file size low e.g. several images on a page or something.

    Ok I have to ask the follow-up question: why is TIFF better than PNG if PNG is lossless? 

    D Fosse
    Community Expert
    Community Expert
    August 2, 2018

    If file size isn't critical, most people including me use TIFF or PSD, totally uncompressed and with support for everything.

    I suppose it depends a bit on image sizes. PNG is a web format. It was never intended for print and I don't know how it handles large files. And crucially - while the format supports icc profiles, implementation is erratic. Even Photoshop strips the profile in PNG under some circumstances.