W3C home > Mailing lists > Public > www-style@w3.org > August 2005

[CSS21] Gamut Mapping

From: Craig Northway <craign@cisra.canon.com.au>
Date: Thu, 25 Aug 2005 14:30:40 +0200
Message-ID: <430DB9F0.7080409@cisra.canon.com.au>
To: www-style@w3.org

Section 4.3.6

Could you specify that users agents may perform higher quality mapping
of colours from one gamut to another? Specifying that they should be
clipped will produce poor results when the output colour space is not
'close' to sRGB, such as a CMYK printer.

For example User Agents may use a process that provides mapping of the
gamut to the device gamut in other ways, such as perceptual or
photometric gamut mapping. This may involve compressing the full gamut
of colours to fit inside the gamut of the output device, rather than
simply clipping those outside the gamut so as to provide a better visual
output. Please allow conformant UA's to perform higher quality gamut 

Also please specify late clipping of colours as per CSS 2.0. Thus 
preserving colours
until the final rendering step. This will also facilitate better colour

Craig Northway
Received on Thursday, 25 August 2005 12:30:53 UTC

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