Re: Image without profile gets an sRGB profile on Mavericks
Re: Image without profile gets an sRGB profile on Mavericks
- Subject: Re: Image without profile gets an sRGB profile on Mavericks
- From: edward taffel <email@hidden>
- Date: Sun, 23 Mar 2014 20:29:07 -0400
quartz is color managed—all rasters are tagged: when you import an untagged jpeg, srgb is assigned [a likely/logical candidate to characterize an untagged jpeg]. if your app is color managed [is it?] you should present similar options to what you see when you reopen the file in photoshop [allow the user to assign or convert], otherwise you can just run with it. however note: if you emit the image in a quartz pdf stream it retains the srgb profile, which is not necessarily what you want, i.e. the image is no longer unmanaged.
has anyone discovered a way to emit an unmanaged/untagged image from a quartz pdf context?
On Mar 23, 2014, at 2:14 PM, Leonardo <email@hidden> wrote:
> I create a jpg RGB image with Photoshop "without" any icc profile.
> I import it in my app.
>
> NSBitmapImageRep *srcRep = [NSBitmapImageRep imageRepWithData:imageData];
> NSLog(@"profileName %@", srcRep.colorSpace.localizedName);
>
> On OS X 10.8.5 I properly get "Device RGB".
> On Mavericks 10.9.2 I wrongly get "sRGB IEC61966-2.1".
>
> Therefore I can't understand whether the image:
> 1. has no profile then I have to assign a profile chosen by my user.
> 2. has its own profile then I do not touch it.
>
> I even tried CGColorSpaceCopyName. Same result.
> Did Apple changed its mind on Mavericks giving a profile to all the orphans,
> or am I missing some step?
>
>
> Regards
> -- Leonardo
>
>
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