RGB to sRGB conversion for the web question.

Well, this looks like the most appropriate forum for this question.

This is a problem that had just recently began to give me issues. When I resized and save an image for the web - resize the file, sharpen, convert to 8 bit, and convert to sRGB color space. I've never had a problem, but lately after the conversion, the JPEG file I save is considerably warmer in color temperature - enough that yellow, (greens), appear too warm and too yellow.. I've tried this several times, and have been careful in my steps, but still have this problem. Any suggestions/thoughts to resolve?

Thank you.

Well, there's the obvious Ned - make sure you're converting to Adobe RGB, not just assigning it. Other than that, is it possible that this image has more colors that are outside the sRGB gamut than you're used to? They may be getting clipped somehow that would account for it. Bright yellows (I think) are one area that Adobe RGB is larger than sRGB. Are any other of your colors shifting warmer? Or just the ones you mentioned?

Thanks for the reply, David. I'm definitely converting it to profile. the only colors that are obviously shifting at the yellows - it is hard to tell with the others, and whether it is an overall shift or not. It could be...

I had this exact issue with CS3 a few weeks ago with an image that had a lot of warm yellows and oranges. I found that if I "save for web" the colors were terrible; if I "save as" and selected jpeg the colors were just what I expected. Now, while this worked and I am happy with the jpeg image, I have no idea why this happened.

Ned, before you assume it's a Save for Web issue, try setting your soft proof profile to sRGB and turn on gamut warnings to see if the colors are even in the sRGB space. If they are not, the issue may well be the conversion (e.g. "intent" setting).

Did you happen to wipe out your PS settings recently?

Guy

Ed pointed out what's becoming a common complaint with the 'Save for Web' feature in CS3.
Try his advice and see if that does the trick.

Thanks for the advice.. it appears that nothing has changed as far as settings. I did take a file I saved earlier and opened it in photoshop and checked gamut warning. Much was out of gamut. I saved a new file, converting to sRGB and this time selecting perceptual as the intent. It saved and I reopened without anything out of gamut - yet the file still looked the same if I viewed it with windows picture viewer, internet explorere - or publishing it to the web, and looking at it in a web browser - still all the same. When I look at the saved image in PS, it looks fine.. pretty puzzling.

I do save as you mentioned Ed. I have actually never used the save for web function before, and only did this time to test the image, however no matter what manner I do it in, I have the issue..

Its not that big of a deal to me, I guess, it just seems strange...

Hmm...having it view properly only in PS makes it sound like it's still a colorspace issue Ned (i.e. that's the only program you mentioned that's color managed, unless by chance your browser is). Have you changed your monitor settings lately? Do images you've posted prior still look OK (can you open an old image in PS, and look at it on the web)?

Maybe, if all else fails, you should wipe out your PS settings...

My two cents worth--I looked at your Gorge picture on your web site, which seemed to my eye at least to be heavier on the yellow than need be. After playing with it for a bit, the best changes I could come up with were a downshift in red and green of about 7% into cyan and magenta, and an upshift of yellow of about 11% into blue. Of course that is my eye, and subject to my visual preferences.

Granted that my monitor is correctly calibrated (I do it weekly), this is what I would expect in my work of a calibration issue. Coincidentally, I resize and do my final sharpening with smart sharpen (luminosity only). Unsharp mask will sometimes give me a color fade that needs correcting. I also post sRGB with "save to web." I have never had an observable issue such as been talked about here.

Above is your photo with the color shifts mentioned.

Ned, good advice given so far. I'd also suggest reading an article I wrote on this issue. This may or may not be your problem, but there are color issues with the web that create inconsistent results, and your problem sounds exactly what I experienced before I started soft proofing. In my experience, it is the blues and greens that go first.
http://www.naturefocused.com/articles/softproofingforweb.php

I'll give it a try, Greg - thank you. Thanks to everyone else, too... I've tried all of your suggestions, to no avail, though.. but I really appreciate the input - and perhaps it will help on future, (knock on wood), issues...