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myininaya Group Title

I think this is a computer science question. Why do you lose sharpness in your pictures when saving a png as a jpeg? Also if I wanted to keep sharpness in a picture but wanted the file extension to change to a more popular file extension, what file extension should I choose?

  • 2 years ago
  • 2 years ago

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  1. agdgdgdgwngo Group Title
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    http://stackoverflow.com/questions/2336522/png-vs-gif-vs-jpeg

    • 2 years ago
  2. asnaseer Group Title
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    Here is a good comparison of them: http://info.eps.surrey.ac.uk/FAQ/standards.html Basically jpeg is lossy and png is not

    • 2 years ago
  3. asnaseer Group Title
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    so you need to weigh up quality vs compression

    • 2 years ago
  4. myininaya Group Title
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    I want quality for sure but I want a file extension that is popular (you know to upload on a webpage)

    • 2 years ago
  5. myininaya Group Title
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    such as OpenStudy

    • 2 years ago
  6. edumacator Group Title
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    Hi Myininaya, The jpeg format allows for image compression, so it looks for similarities in colors in the different areas of the pictures. If the picture is at night and there is a black sky in the background, jpegs compress that part of the picture to allow save on memory. You can keep jpegs pretty clear, but you have to do it by saving it without a lot of compression. You can do that in Photoshop and other photo editing programs, some of them are free. The same programs can convert from one format to another. You have to make sure to use those programs though. Changing the file extension by itself will make the image unreadable. A couple free programs are: http://picasa.google.com/, and http://fotoflexer.com/.

    • 2 years ago
  7. asnaseer Group Title
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    PNG is now very widely supported

    • 2 years ago
  8. agdgdgdgwngo Group Title
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    JPEG is most suitable for real-world pictures you take with a digital camera, whereas the PNG format is nice for those icons and graphics you design in software .

    • 2 years ago
  9. myininaya Group Title
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    Pretend like there was this person named @rebeccaskell94 and she was having issues with a png file I gave her...and that is all I really know...she was having trouble uploading this file to some site *cough openstudy cough*

    • 2 years ago
  10. agdgdgdgwngo Group Title
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    lol

    • 2 years ago
  11. myininaya Group Title
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    I don't know if it is windows to mac thing or not

    • 2 years ago
  12. myininaya Group Title
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    I think she had mac and I had windows

    • 2 years ago
  13. asnaseer Group Title
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    PNG is an open standard

    • 2 years ago
  14. agdgdgdgwngo Group Title
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    so .png files as profile pictures don't work? or you can't download .png from OS?

    • 2 years ago
  15. asnaseer Group Title
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    so it should make no difference if you have a Mac/Windows computer

    • 2 years ago
  16. asnaseer Group Title
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    what exactly is the problem being experienced?

    • 2 years ago
  17. agdgdgdgwngo Group Title
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    upload to OS*

    • 2 years ago
  18. myininaya Group Title
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    I think this avatar I'm using was a png though

    • 2 years ago
  19. asnaseer Group Title
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    all images I use on almost any site (including OS) are png files

    • 2 years ago
  20. asnaseer Group Title
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    a good test would be to ask her to open locally on her machine - say in the IE browser

    • 2 years ago
  21. myininaya Group Title
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    Gosh I don't know then. Hopefully @rebeccaskell94 can make some sense on her end. Thank you guys for attacking this question. You all deserve medals.

    • 2 years ago
  22. myininaya Group Title
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    And this might have been a computer science/feedback question...lol.

    • 2 years ago
  23. rebeccaskell94 Group Title
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    haha Sorry Myin!! my bad. U I have to save the pic to my desktop to change it's format and it gives me like a dozen options but the few that OpenStudy actually accepts, are all blurry. :/ I'm on a mac haha

    • 2 years ago
  24. myininaya Group Title
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    @shadowfiend I might should have put this in the feedback group but it also sounded computer sciencey. Anyway what do you think a good file extension would be if you don't want to lose a lot of prettiness in your avatar?

    • 2 years ago
  25. asnaseer Group Title
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    I have a mac as well and always use png format pics with no issues.

    • 2 years ago
  26. rebeccaskell94 Group Title
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    well here let me show you meh picture...give me just a sec

    • 2 years ago
  27. myininaya Group Title
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    This was the file I was trying to give her.

    • 2 years ago
    1 Attachment
  28. myininaya Group Title
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    Whenever she tried to use it, it would show up blurry because of switching file extensions I guess.

    • 2 years ago
  29. rebeccaskell94 Group Title
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    ummmm I guess it worked. o.o weird.

    • 2 years ago
  30. myininaya Group Title
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    lol. omg,

    • 2 years ago
  31. asnaseer Group Title
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    and here is the same file I just saved and re-uploaded...

    • 2 years ago
    1 Attachment
  32. rebeccaskell94 Group Title
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    xD idk why! Last time I saved it and tried people kept telling me my picture was blurry (it was) Oh well, I look like a boss now. My orange hair, and all.

    • 2 years ago
  33. asnaseer Group Title
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    looks like rebecca is going viral! :)

    • 2 years ago
  34. rebeccaskell94 Group Title
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    Is that good or bad?

    • 2 years ago
  35. asnaseer Group Title
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    it faaaaaantaaaaastic! :D

    • 2 years ago
  36. rebeccaskell94 Group Title
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    haha YAY *high 5* :D

    • 2 years ago
  37. asnaseer Group Title
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    *high 5*

    • 2 years ago
  38. shadowfiend Group Title
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    Yeah, for the record, stick to PNG if you don't want blurriness. OpenStudy, Windows, and Mac OS X should all support PNG out of the box. Mostly because it is one of my favorite file formats EVAR :p

    • 2 years ago
  39. myininaya Group Title
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    Thanks again all! :)

    • 2 years ago
  40. rebeccaskell94 Group Title
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    haha @shadow and yes! Thank you all so much!

    • 2 years ago
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