Thursday, April 1, 2010

Jpg profiles a bit funny from Ps CS4

I had posted a pic here

[URL=''http://www.runboard.com/bthedigitalmonochromeforum.f14.t197340''[/URL]



and got this comment from one forum user:



[quote] 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)?[/quote]



I had set the profile to sRGB in photoshop CS4 before saving the jpg and uploading it, so does anyone understand what is going on here?



Is it a problem with CS4 files being read by previous versions of Ps perhaps?

(yes 'maximise compatability' is set)



thanks
Jpg profiles a bit funny from Ps CS4
h,



Please know that for links, you just need to type in the full URL for it to automatically become a link. For quotes, hit ''return'' then preface the quote with a %26gt;.



Are you saying that the file is converted automatically from sRGB? I'm not following you here. What settings do you have as defaults in Edit... --%26gt; Color Settings... ?



Neil
Jpg profiles a bit funny from Ps CS4
Thanks for your advice on links



File was originally a CR2 file, and in ACR was in Prophoto before I changed it to 8 bit and then EDIT%26gt;convert to profile%26gt;sRGB and saved as a jpg before uploading



So file wasnt converted automatically UNLESS the hosting site also did something to it. I converted it myself in CS4



Have I explained it ok - please ask again if not?

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.

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