I tend to scan in all files, whether b&w or colour, as RGB, and change to sRGB for the web. I find that if I use the "Save As" function in photoshop, the tag remains embedded no matter what. If I use the "Save for Web" function, though, the tag seems to 'disappear" and it becomes an "untagged" file.
So there is....Stargazer,
When you use the "Save for Web" function, there's a box labelled "ICC Profile" that by default is unchecked. When that's checked, the file will be automatically be saved with the embedded profile.
Keith.
sRGB color space is a standard RGB (Red Green Blue) color space created cooperatively by Hewlett-Packard and Microsoft Corporation for use on monitors, printers, and the Internet. It has been endorsed by the W3C, Exif, Intel, Pantone, Corel, and many other industry players, is also well accepted by open-source software such as the GIMP, and is used in proprietary and open graphics file formats such as SVG.
sRGB is intended as a common color space for the creation of images for viewing on the Internet and World Wide Web (WWW), the resultant color space chosen using a gamma of 2.2, the average response to linear voltage levels of CRT displays at that time.
It is important to realize that sRGB was designed to match what current (in 1996) CRT monitors do, not to be an ideal color space. Vast amounts of software, both professional and personal computer software, assumed an 8-bit image file placed unchanged into an 8-bit/channel display buffer will display with these colors and intensities. Modern non-CRT hardware, such as LCD, digital cameras, and printers, although they don't naturally produce an sRGB curve, have been built with compensating circuitry or software so that in the end they also obey this standard (this is somewhat less true for high-end professional equipment). For this reason you can assume (in the absence of embedded profiles or any other information) that any 8-bit image file, and any 8-bit image API or device interface, is in the sRGB color space.
I'm thinking also it's possible that when photoshop converts in the 'save for web' option the default IS sRGB - even though it says it's untagged - which only changes if you check the ICC profile box, (and want to preserve a different profile) but I can't find anything to confirm this at the moment - if anyone knows I'd be grateful otherwise I'll just keep the box checked.
Today's browsers are not colour managed, so they simply display the image in the system's colour space which is usually closest to sRGB. Therefore you will want to convert the image to sRGB just before "Save for Web".
Cheers, Gary
Web browsers ignore profiles anyway.
Some browsers on the Mac as far back as IE 5 have supported ICC profiles. I'm pretty sure Safari does.
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