compressing a graphic

I Made a banner for my website using photoshp 3.0, It is huge in Kilobytes, and I want to submit it to a banner exchange but it is too big in size. The banner exchange requires that the banners be no bigger than 8Kb in size. How can i compress it so I can submit it?
katdudeAsked:
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test98Connect With a Mentor Commented:
1.)you have to reduce the color depth. 24-bit pictures are 3-times lager than 8-bit pictures. toolbar: image->modus->indexed colors->exact or world wide web or custom.

For a higher quality you can use dithering

After this procedure export it as gif

2.)save it as jpg: file->copy save as->select *.jpg and use a high compression rate.




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jimatCommented:
Select "image" from your toolbar. Select image size.Change the resolution to fewer pixels
per inch.
This will decrease the size of the file.Lower the resolution to the limit of a acceptable image. You may have to experiment a bit.
This is the procedure in PS 4.0
I believe that 3.0 has the same options
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wsanchezCommented:
You can also save it as jpg and you will be asked what compression size you want.
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singyCommented:
Ulead do a couple of great plugins that alow you to save PSD files as either GIFs or JPGs. the plugin interface shows a preview of your 'compressed' image and also tells you what file size it is expected to, so using this plugin (Ulead web razor (gif and jpg smartaver)) will alow you to optimise your graphics to the max
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najjieCommented:
Hiya. Well,  i was thinking you might want to try downloading the free trial version of Image Ready (adobe product) which is made especially for compressing and optimizing graphics for the web. It also does it in such a way that you can decrease the amount (eg how many bits of color) little by little and see how it affects the image, before you save it. It works with both gif and jpeg. Another good thing about it is that it also tells you how long it will take the image to download on the web.
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TojamCommented:
To keep your banner ad small, it's best to design from the beginning with that in mind.
Assuming you're using the GIF file format for the banner:

1) Use Large areas of flat color.
2) Select colors to use from the web palette, but use an adaptive palette to reduce the       number of colors when you're ready to save it out. Don't save it out in a 216 color web
   safe palette when you can get away with a 16 color palette.
3) When converting to an adaptive palette, make sure your areas of flat color don't get     dithered.... dithering adds to filesize. It's often best to keep dithering turned off, to     preserve flat color areas.
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