[Openicc] W3C recommendations for displaying RGB JPEG images with embedded ICC-profiles

[Kai-Uwe Behrmann]

Hello Jan-Peter,

Am 15.08.11, 17:26 +0200 schrieb Jan-Peter Homann:
> Hello Chris, hello list
>
> JPEG image formats allow to embedd ICC-profiles into image files, to give a 
> clear color reference, if the colorspace of an image is not sRGB.
> I have done some research on the W3C site to get an impression, if W3C does 
> any statements, if its forbidden to to use JPEG images with embedded 
> profiles, or if this is allowed.

Forbidding ICC profiles would contradict existing specifications and make 
the W3C spec inconsistent.

> From my point of view, it would make sense, if the W3C would define some 
> levels of Browser conformance for usage on embedded profile JPEG (and PNG) 
> images.

In PNG the iCCP tag for ICC profiles is defined:
http://www.libpng.org/pub/png/spec/iso/index-object.html#11iCCP

There are more references on ColourWiki:
http://www.oyranos.org/wiki/index.php?title=Standards#File_Formats

> It is possible to (and e.g. als available with Firefox), that ICC-profile 
> support is implemented at application (e.g. browser) level.
> We also have a growing number of devices and platforms (e.g. Android and 
> Apple iPad), which currently do not provide an display profile to 
> applications.

> This situation could be solved, if applications (e.g. browsers) are using 
> sRGB as an default internal Display profile, if the platform do not delivers 
> an display-profile. In this case JPEG images with e.g. embedded AdobeRGB 
> ICC-profile would be rendered with application based colormanagement to sRGB 
> and than displayed on a device.