[argyllcms] Re: [argyllcms] Re: OcИ Lightjet - Print or Video RGB?
- From: adam k <aak1946@xxxxxxxxx>
- To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
- Date: Tue, 30 Mar 2010 18:18:01 -0400
Is there another interface for this program other than displcal?
Sent by AAK from iPhone 3Gs
On Mar 30, 2010, at 6:15 PM, Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
wrote:
> Michal Novotny wrote:
>
>> OcО©╫ Lightjet doesn't use any internal RGB->CMYK conversion, so
>> should I
>> use Print RGB or Video RGB targen option?
>
> If the RGB-device do the reflection prints, You need use PrintRGB.
> If device outputs the light (is an emission one) - You should use
> VideoRGB.
>
>> My photolab doesn't provide any profile :-/ I've found few profiles
>> on
>> internet and by trial and error I've found one which visually
>> corresponds to the printed photos, but I didn't do any
>> measurements. I'd
>> like to use this profile as a pre-conditioning profile and the
>> question
>> is what degree of adaptation is reasonable in my case?
>
> If the profile "visually corresponds" the photos, You can use a high
> degree, 0.8 and higher, IMHO.
>
>> I'm probably going to make 6 A4 charts for DTP22 what means 4692
>> patches. Is this amount sufficient for good LUT profile? Or is it
>> uselessly too much?
>
> In general, the photolabs are quite linear, smooth behavior printing
> devices. By my experience, the 828-1200 patches is enough to profile
> the photolab well. The 2-2.5 thousands of patches may be enough for
> the excellent quality.
> I recommend You to ask the photolab operator to print Your targets
> (and photos) right after standard photolab paper-and-chemistry
> calibration procedure (generally one per day or often) and without
> manual corrections, with automatic adjustments off. It may be more
> important, than huge number of patches in the target.
>
> Good Luck!
>
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- » [argyllcms] Re: [argyllcms] Re: OcИ Lightjet - Print or Video RGB? - adam k
