ptarmigan Posted February 19, 2011 Author Share #21 Posted February 19, 2011 Advertisement (gone after registration) Adan The images are sRGB as PS confirms. The problem is I think that the wide gamut monitor is displaying the image in it's own colour space with firefox and IE and not sRGB as it should. Switching the monitor to sRGB means firefox images look as they should. I don't know if it's a Mac related issue or a Mac and PC issue though. Link to post Share on other sites More sharing options...
Advertisement Posted February 19, 2011 Posted February 19, 2011 Hi ptarmigan, Take a look here Colour rendition issues - different browsers. I'm sure you'll find what you were looking for!
sandymc Posted February 19, 2011 Share #22 Posted February 19, 2011 sandy - possibly. I'll take that under advisement. Are we confusing "color space" with "profile"? Andy, I used "color space" deliberately because on browsers that aren't color managed (or have color management disabled), there are no profiles. All the browser does is to throw up the image data on the screen. Implicitly what that amounts to is the browser assuming that the data is already in whatever color space the display uses. If (a) that data is in an sRGB color space, and ( the monitor's color space is sRGB (or something close to it), then color will be ok, regardless of whether the image is even tagged with a color profile. If either (a) or ( are not true, then you need color management, and profiles for both the image and the monitor to get ok color. Regards, Sandy Link to post Share on other sites More sharing options...
adan Posted February 19, 2011 Share #23 Posted February 19, 2011 I guess I've always heard screens or monitors described in terms of either: "gamut" (the colors they are physically capable of, or limited to, displaying, based on phosphors and other hardware characteristics) or "profiles" (corrective tweaks to the signals sent to the monitor, to get those phosphors to display the color relationships as well as they can, given the hardware limitations) All devices have a gamut and can be profiled, but I've never heard of a printer or scanner - or monitor - having a "color space" in addition. Except as defined by a profile. Now, it happens that the structure of a profile - and color spaces - are similar. Each has a white point, a black point, color primary definitions, and a gamma associated with it. So it is possible to use a color space (e.g. sRGB) as one's monitor profile - - but NOT good practice, because it is using "canned" numbers as defined by the ISO, Adobe, Apple, or Microsoft (sRGB) rather than actually measuring how one's own specific screen renders color. I.E. I can pick an sRGB profile out of my big colorsync list of ICC profiles and tell my Mac to use that as the monitor profile. But by doing so I am NOT give my monitor an "sRGB color space" (and I'm probably totally bolluxing its usefulness for image editing, as well). Adobe RGB is not a Monitor Profile - Photo Tips @ Earthbound Light Link to post Share on other sites More sharing options...
sandymc Posted February 19, 2011 Share #24 Posted February 19, 2011 Andy, Well, I don't like gamut, because gamut isn't a full description - e.g., it doesn't include gamma. And profile - well, to me, that's a characterization of a color space - e.g., we have ICC profiles. So I tend to talk about "color space" when it comes to actual native characteristics of a device. But that's just what I do Regards, Sandy Link to post Share on other sites More sharing options...
adan Posted February 19, 2011 Share #25 Posted February 19, 2011 Gotcha! Link to post Share on other sites More sharing options...
ptarmigan Posted February 21, 2011 Author Share #26 Posted February 21, 2011 Rich Interesting stuff. On my mac, safari passes the test but firefox only supports ICC v2. However your instructions for enabling colour management in Firefox are I think updated as the latest version offer no opportunity to set the value gfx.color_management.enabled as it isn't there. I did try to set it up before as stunsworth gave a useful link earlier in the thread. Link to post Share on other sites More sharing options...
ptarmigan Posted February 21, 2011 Author Share #27 Posted February 21, 2011 Advertisement (gone after registration) Just checked PS CS5 and I see the sRGB profile I typically save in is v2.1 but I haven't been able to check LR3, maybe that is sRGB v4? Does anyone know? I'll see if images from PS CS5 have the same issue in Firefox or not. Link to post Share on other sites More sharing options...
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