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External
Since: Dec 17, 2006
Posts: 10
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(Msg. 1) Posted: Fri Nov 09, 2007 4:13 pm
Post subject: semi transparent GIF, how to?
Archived from groups: comp>graphics>apps>photoshop (more info?)
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I need to create an image for my web site that features several semi
transparent or pseudo translucent areas. I want the image area in
question to be visible, but the web page background should shine through.
The image needs to be in GIF format, I can't use PNG because it isn't
well supported by some browsers.
I thought of making an area translucent by making every other pixel of
that area (in checkerboard fashion) transparent.
Ho would I go about this? I'm using CS2.
--
Gregor mit dem Motorrad auf Reisen
http://hothaus.de/greg-tour/ |
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External
Since: Jun 04, 2004
Posts: 199
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(Msg. 2) Posted: Fri Nov 09, 2007 4:13 pm
Post subject: Re: semi transparent GIF, how to? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Greg N. wrote:
> I thought of making an area translucent by making every other pixel of
> that area (in checkerboard fashion) transparent.
>
> Ho would I go about this? I'm using CS2.
Install Filter Factory from the Goodies folder of your PS installation CD
(read the note about msvcrt10.dll).
Make sure your image not the background layer (if it is, double-click its
icon in the layers palette to promote it to a normal layer).
Filter->Synthetic->Filter Factory...
and in box A enter
(x%2^(y+1)%2)?a:0
HTH
Andrew |
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External
Since: May 27, 2007
Posts: 176
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(Msg. 3) Posted: Fri Nov 09, 2007 4:13 pm
Post subject: Re: semi transparent GIF, how to? [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
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External
Since: Sep 03, 2007
Posts: 35
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(Msg. 4) Posted: Fri Nov 09, 2007 9:24 pm
Post subject: Re: semi transparent GIF, how to? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Greg N. wrote:
> I need to create an image for my web site that features several semi
> transparent or pseudo translucent areas. I want the image area in
> question to be visible, but the web page background should shine through.
>
> The image needs to be in GIF format, I can't use PNG because it isn't
> well supported by some browsers.
>
> I thought of making an area translucent by making every other pixel of
> that area (in checkerboard fashion) transparent.
>
> Ho would I go about this? I'm using CS2.
Gifs cannot be translucent. But you have the right idea for a
workaround. See here:
http://mysite.verizon.net/hannigan7/lucyinthesky.html >> Stay informed about: semi transparent GIF, how to? |
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External
Since: Feb 10, 2005
Posts: 382
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(Msg. 5) Posted: Fri Nov 09, 2007 11:29 pm
Post subject: Re: semi transparent GIF, how to? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <fh1tmc$q57$1@online.de>, "Greg N." <yodel_dodel.DeleteThis@yahoo.com>
wrote:
> I need to create an image for my web site that features several semi
> transparent or pseudo translucent areas. I want the image area in
> question to be visible, but the web page background should shine through.
>
> The image needs to be in GIF format, I can't use PNG because it isn't
> well supported by some browsers.
You can't do translucency in GIF; the GIF file specification forbids it.
There's no such thing as a translucent GIF, unfortunately.
> I thought of making an area translucent by making every other pixel of
> that area (in checkerboard fashion) transparent.
That'll work. You can tell Photoshop to dither the transparency in the
Save for Web dialog.
--
Photography, kink, polyamory, shareware, and more: all at
http://www.xeromag.com/franklin.html >> Stay informed about: semi transparent GIF, how to? |
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External
Since: Nov 13, 2007
Posts: 17
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(Msg. 6) Posted: Tue Nov 13, 2007 8:07 pm
Post subject: Re: semi transparent GIF, how to? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Greg N. wrote:
> The image needs to be in GIF format, I can't use PNG because it
> isn't well supported by some browsers.
One browser, Internet Explorer 6. Safari, IE7, Firefox, Opera and
others supports it just fine. You can get PNG's to work with alpha-
level transparency in IE6. It's fairly easy and it'll spare you a lot
of work on getting GIF to work kind-of-but-not-really-like true alpha-
level transparency.
For simple <img src="myimage.png" .../> you can use
http://blogs.msdn.com/dmassy/archive/2004/08/05/209428.aspx
For backgrounds defined in CSS, it's more tricky and requires changes
to the CSS.
--
Toke Eskildsen - http://ekot.dk/ >> Stay informed about: semi transparent GIF, how to? |
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