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myininaya

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?

  • one year ago
  • one year ago

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

    • one year ago
  2. asnaseer
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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

    • one year ago
  3. asnaseer
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    so you need to weigh up quality vs compression

    • one year ago
  4. myininaya
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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)

    • one year ago
  5. myininaya
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    such as OpenStudy

    • one year ago
  6. edumacator
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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/.

    • one year ago
  7. asnaseer
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    PNG is now very widely supported

    • one year ago
  8. agdgdgdgwngo
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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 .

    • one year ago
  9. myininaya
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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*

    • one year ago
  10. agdgdgdgwngo
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    lol

    • one year ago
  11. myininaya
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    I don't know if it is windows to mac thing or not

    • one year ago
  12. myininaya
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    I think she had mac and I had windows

    • one year ago
  13. asnaseer
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    PNG is an open standard

    • one year ago
  14. agdgdgdgwngo
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    so .png files as profile pictures don't work? or you can't download .png from OS?

    • one year ago
  15. asnaseer
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    so it should make no difference if you have a Mac/Windows computer

    • one year ago
  16. asnaseer
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    what exactly is the problem being experienced?

    • one year ago
  17. agdgdgdgwngo
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    upload to OS*

    • one year ago
  18. myininaya
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    I think this avatar I'm using was a png though

    • one year ago
  19. asnaseer
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    all images I use on almost any site (including OS) are png files

    • one year ago
  20. asnaseer
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    a good test would be to ask her to open locally on her machine - say in the IE browser

    • one year ago
  21. myininaya
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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.

    • one year ago
  22. myininaya
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    And this might have been a computer science/feedback question...lol.

    • one year ago
  23. rebeccaskell94
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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

    • one year ago
  24. myininaya
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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?

    • one year ago
  25. asnaseer
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    I have a mac as well and always use png format pics with no issues.

    • one year ago
  26. rebeccaskell94
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    well here let me show you meh picture...give me just a sec

    • one year ago
  27. myininaya
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    This was the file I was trying to give her.

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

    • one year ago
  29. rebeccaskell94
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    ummmm I guess it worked. o.o weird.

    • one year ago
  30. myininaya
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    lol. omg,

    • one year ago
  31. asnaseer
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    and here is the same file I just saved and re-uploaded...

    • one year ago
    1 Attachment
  32. rebeccaskell94
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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.

    • one year ago
  33. asnaseer
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    looks like rebecca is going viral! :)

    • one year ago
  34. rebeccaskell94
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    Is that good or bad?

    • one year ago
  35. asnaseer
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    it faaaaaantaaaaastic! :D

    • one year ago
  36. rebeccaskell94
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    haha YAY *high 5* :D

    • one year ago
  37. asnaseer
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    *high 5*

    • one year ago
  38. shadowfiend
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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

    • one year ago
  39. myininaya
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    Thanks again all! :)

    • one year ago
  40. rebeccaskell94
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    haha @shadow and yes! Thank you all so much!

    • one year ago
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