Date: Tue, 19 Jun 2007 13:53:13 +0100 (BST)
From: Matthew Hodgson <matthew@arasphere.net>
To: colorsync-users@lists.apple.com
Subject: Non-embedded sRGB colorspace query
Hi,
I'm developing a photo gallery/database web app, and have the problem of wanting to display a couple of hundred color-correct sRGB thumbnails on a page without having to embed an sRGB ICC profile
in each one. Given each thumbnail is around 5Kb (without profile), and the HP sRGB ICC is around 3Kb, I'm trying to avoid spending almost half my bandwidth transferring redundant information
around.
My main reason for specifying a profile for the thumbnails in the first place is to ensure that Safari displays them correctly - as otherwise on a default 1.8 gamma OS X install the images are
noticeably and disappointingly bleached out. I was hoping that I'd be able to work around this by setting the EXIF ColorSpace tag to 1 (and InteroperabilityIndex to R98, and
InteroperabilityVersion to 0100) - but it seems that Safari does not appear to honour this, and instead requires an explicit sRGB ICC profile to be embedded.
The guys on #webkit suggest that color management in safari is all magically done by ColorSync, and so I'm asking here if anyone can suggest how to persuade Safari to interpret the JPEG as
expressed in sRGB - without having to waste bandwidth by embedding the profile? Or is there a way to simply specify a blunt desired display gamma in a JPEG which Safari will uphold?
thanks hopefully,
Matthew.