CS3 color profiles/settings - problem

[genesis111989]

Hi people,

I'm having some issues with my scans that I process in photoshop. I use my schools Imacon to scan my transparencies and save them as 16 bit RGB Tiffs. After I process them in photoshop I convert them to 8 bit files and save the resized to jpegs. When I upload them online the images lack color and sometimes contrast and look like the midtones were pumped up a little bit. Has this happened to any of you? If anyone knows how I can fix this any info would be greatly appreciated. I'm assuming it has to do with my color and profile settings

also to note, when I view the original file online it looks okay, but when I look at the thumbnail of the image in the gallery, or a smaller version of the image, thats when I see the problem.

Here's an example:

http://www.pbase.com/genesis111989/image/104393347

Thanks,
AR

[Ben Hopson]

I don't know what your workflow is for web images. Try converting to the sRGB color space (Edit>Convert to Profile) before saving for web. If you are not doing that you should see a big difference.

Ben

[Ken Lee]

Sounds like a mis-match of color spaces, which can be avoided in Photoshop.

Popular web browsers (http://www.kenleegallery.com/html/tech/tech.html#Browsers) like Internet Explorer and Firefox show all images in the sRGB color space. Unless you are using Safari, OmniWeb or Chrome (which use the WebKit (http://www.webkit.org) rendering engine) your browser ignores embedded ICC profile tags altogether, so even if you save the image with a particular ICC profile attached, the "average" browser can't tell the difference.

(Note that until the WebKit rendering engine was recently ported to Windows, you needed a Mac to view images with support for color profiles. It is telling that Google chose the WebKit engine for their new Chrome (http://www.google.com/chrome) browser).

For images intended for the web, be sure to perform your proofing in sRGB, or use the Photoshop commands that strip out your ICC profile, etc. like "Save for Web".

To see how this works in practice, have a look at the Web Browser Color Management Tutorial. (http://www.gballard.net/psd/srgbforwww.html)