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images with transparent backgrounds

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  • 23-02-2005 9:52am
    #1
    ConsultClifford
    Registered Users Posts: 252 ✭✭


    Hi

    One of my web pages will have a patterned background.

    I want to insert product pics on the page. The products images background will be transparent so as one can see the page background below.

    However my problem is that when i save the image as a gif of png and look at the webpage there are white pixels around the edges - These i can get rid of if I zoom in an get rid of all the semi transparent pixels (and draw an outline)
    However this is very time consuming if I have a lot of product images (which i do!) :cool:

    Is there any tool (or way in photoshop) to get rid of those annoying white pixels?

    Tnx


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    #2
    ConsultClifford
    Registered Users Posts: 252 ✭✭ConsultClifford


    Got it!
    What's a Matte for?
    Photoshop is pixel-based. In GIF, pixels are either on or off. The way PS makes the edges look smooth, though, and not jaggy, is through what they call "anti-aliasing." What this is is it makes the edge pixels semi-transparent.

    So in Supra, some of the pixels around the edge appear on our white background to be pink or lavender. This is because the purple or red pixels are semi-transparent against the white.

    Well, since you can't have them semi-transparent, the Matte color tells PS what color to combine with these edge pixels to make them transparent.


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