Jpgs' odd profiles

I SimoniusI Simonius Registered Users Posts: 1,034 Major grins
edited February 5, 2009 in SmugMug Support
I had posted a pic here


and got this comment from one forum user:
I pulled the image into Photoshop and there was a massive shift in tones. To get it back to the same level as on the WWW I had to reduce the brightness by 25%.

As a result we may not be seeing what you see. I suggest you convert the colour profile to sRGB before posting on the web. Why d you use the profile you do (Dot Gain 15)?

I set the profile to sRGB in photoshop CS4 before saving the jpg and uploading it, and I thought smugmugchanged all profiles to sRGB anyway, so does anyone understand what is going on here?:scratch

thanks
Veni-Vidi-Snappii
...pics..

Comments

  • jfriendjfriend Registered Users Posts: 8,097 Major grins
    edited February 4, 2009
    I Simonius wrote:
    I had posted a pic here


    and got this comment from one forum user:



    I set the profile to sRGB in photoshop CS4 before saving the jpg and uploading it, and I thought smugmugchanged all profiles to sRGB anyway, so does anyone understand what is going on here?headscratch.gif

    thanks

    When I load your original size image into CS3, it looks like it's a perfectly fine sRGB. When I load the Large size image (which is what you have displayed in the forum) into CS3, it tells me that it has a damaged ICC profile. Since that is an image that Smugmug generated, I wonder if that's a Smugmug issue.
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  • I SimoniusI Simonius Registered Users Posts: 1,034 Major grins
    edited February 5, 2009
    jfriend wrote:
    When I load your original size image into CS3, it looks like it's a perfectly fine sRGB. When I load the Large size image (which is what you have displayed in the forum) into CS3, it tells me that it has a damaged ICC profile. Since that is an image that Smugmug generated, I wonder if that's a Smugmug issue.

    aha! Thanks, this looks like an interesting working theorymwink.gif

    got this reply from Adobe user forums
    Well, the file is grayscale, but includes an sRGB profile.
    Photoshop recognizes that the profile doesn't match the mode, says it's invalid, and opens the file with the workingspace grayscale profile instead.

    Yes, something changed that image after S4W or Photoshop - other metadata was stripped.
    My guess is the hosting site software did it, and doesn't know how to handle profiles.
    Veni-Vidi-Snappii
    ...pics..
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