On 20 Dec 2005 at 14:10, graywolf wrote: > I don't even have to test that to know it is true. We seem to be talking > on different wave lengths. > > All I said in response to your original post was that browsers do not > have to be color management savy because they assume all web images are > sRGB.
I contend that the non-CS aware Browser simply render the images in a linear fashion to the display device, everyone preparing images to post to the web assumes that the standard output devices will exhibit a profile which is similar to sRGB, so the images are prepared using an sRGB colour space reference though the profile may not be embedded. As a viewer we have to assume this was the case, the Browser is dumb in the chain. > I also said that Photoshops "Save For Web" converts images to sRGB by > default. Note however that as far as I know it does not insert a sRGB > color profile. > > The "s" in "sRGB" is short for "standard". The web concept is based upon > images being standardRGB images. Once that assumption is made you do not > need color profile conversion features, or color profiles at all, in the > browsers. If you chose to use something different that is your problem. > sRGB is the lowest common denominator, all color systems (even AnnSan's > <grin>) should be able to display it properly, which is of course why it > was chosen. I agree, however I'd bet even though it's become the defacto net standard not that many monitor manage to render a sRGB image too well, lets face it most monitors have contrast and brightness controls. And since the sRGB colour space calls for a compliant output device to have a white-point illumination of 80 cd/m2 and 6500k, these measures are near impossible to gauge using the naked eye, however set two monitors up in adjacent rooms that look fine to the eye then set them next to each other and I'll bet they are visibly different. The supplied monitor profile can only be effective at linearizing gamma, it can't control the white-point or contrast or absolute illumination of the monitor. This is why there is often so much discussion about an image being dark on x persons monitor but perfect on y's. http://www.w3.org/Graphics/Color/sRGB I'm not out to appear adversarial, I just think that photographers will all benefit given a better general understanding of how colour management actually works. I'm happy to be proven wrong too of course :-) Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
