transparency issue

Discussion in 'Graphic Design' started by rooster, Feb 23, 2012.

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  1. rooster

    rooster New Member

    Messages:
    43
    ey again all
    I am using photoshop CS5 to create a small image (60x60) with a transparent background. I make the image with the transparent background, save it as a png file and resave it as a jpg to use.
    When I save it as the jpg so I can open it somewhere else, it has a white background. I know windows will put the white in it as a thumbnail, but when I hopen it in a program like dreamweaver, it puts the white bg on it. This is not for a web design project, but something else. I thought you guys might have good insight. It it because its a jpg file? Should I save it as something different?
    Thanks!
     
  2. Phreaddee

    Phreaddee Super Moderator Staff Member

    Messages:
    1,978
    Just leave it as a png.
    Jpg cannot be tranparent.
     
  3. d a v e

    d a v e New Member

    Messages:
    671
    what is it for then if not for a web design project? might help us suggest the best format
     
  4. rooster

    rooster New Member

    Messages:
    43
    Ill try leaving it as a png.
    Its for a blackberry theme. The new message indicator icon. The image has to be 60x60 to cover the whole icon, but you only use a small part and leave the rest transparent.
     
  5. Websynergi

    Websynergi New Member

    Messages:
    14
    Remember you can use transparency with a gif.
    It'll be supported by older browsers (ie6) with this method. You can use the !important; on your style sheet and use both.
     
  6. Phreaddee

    Phreaddee Super Moderator Staff Member

    Messages:
    1,978
    yes gifs and ie6, if you care for that rubbish.

    gif quality is far inferior to a png. and no one of worth uses ie6 anymore.
     
  7. d a v e

    d a v e New Member

    Messages:
    671
    Phreaddee

    "gif quality is far inferior to a png" - are you talking about gif vs png-8?

    if so i would like to see some examples or some documentation :)
    the only real difference i know about is that png-8 is usually around 10-20% smaller
     
  8. Phreaddee

    Phreaddee Super Moderator Staff Member

    Messages:
    1,978
    well gif/png-8 are about the same in dodgyness
    png-24 on the other hand...
     
  9. d a v e

    d a v e New Member

    Messages:
    671
    ah png 24 i see :) nothing wrong with limited palette aas long as you don't need more than the 256 colours ;) and remember that png-8 also supports alpha transparency
     
  10. Phreaddee

    Phreaddee Super Moderator Staff Member

    Messages:
    1,978
    If it is a limited colour palette, and say a logo, I will try both the png8 and the png24 options before committing to either.

    if there is not a noticeable difference in the display (which there often is with thin hair lines and such) it will come down to file size.
    a 6kb png-8 which renders 98% like the 25kb png-24 well I would probably use the png-8.

    having said that, it just doesnt normally appear crisp enough for my liking.
     
  11. d a v e

    d a v e New Member

    Messages:
    671
    you probably have a better monitor than me :)

    technically i don't understand why a 24 bit png would look better than an 8 bit png, assuming no colours are discarded in the 8-bit png.

    as you say, previewing options is the best way
     

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