Hi,
Keep in mind color transforms are a loosy process--you may loss information
each time you apply a color transform. In this way, it is generally better
to
do the color management at the last stage. I.e., load the image using its
native
representation and do the conversion to monitor space at display time.
That is, unless you plan to edit the image. In this case, you probably want
to
do the image processing in some well-known space. This is the whole point
of workspaces. My recomendation would be to avoid workspaces unless you
really needs that.
For untagged images, you have several options. One would be to let end user
to
select the default colorspace. Many devices (printers, etc) operates in such
way.
Otherwise, you could assume untagged data is in some default colorspace.
Reasonable defaults would be sRGB (cmsCreate_sRGBProfile) for RGB and
SWOP or ISO coated for CMYK.
Regards
Marti Maria
The littleCMS project
http://www.littlecms.com
----- Original Message -----
From: "Paul Miller" <[EMAIL PROTECTED]>
To: <lcms-user@lists.sourceforge.net>
Sent: Sunday, July 30, 2006 7:38 PM
Subject: [Lcms-user] need advice on adding cms to an image viewer
>I am working on an image manipulator/viewer and I want to support ICC
> color profiles so the image will look "right" on the monitor and printers.
>
> I don't have any experience with ICC profiles but I shouldn't have any
> problem integrating the lcms library into my application. But I'm not
> sure where in the process I need to do the color conversion, and what I
> should use as a source profile when loading an image that doesn't have
> one.
>
> Do I need to do a transform on LOAD to get the image into some common
> working space (like sRGB), then another transform at display time to
> integrate the desired output profile? If the image contains an ICC
> profile, should I transform from that profile to the "working" profile?
> What happens if there is no embedded profile?
>
> I appreciate any and all pointers on this matter!
>
>
> --
> Paul Miller | [EMAIL PROTECTED] | www.fxtech.com | Got Tivo?
>
>
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