[argyllcms] Re: Camera profiling?

Ben,

perhaps you should have a look at http://www.qpcard.se/BizPart.aspx?tabId=28

I am using a QPcard 201 and Bibble (http://www.bibblelabs.com) together with a
plugin (Claire: http://www.nexi.com/239)

Andreas

Am Di, 27.05.2008, 18:37, schrieb Ben Goren:
> On 2008 May 27, at 8:43 AM, Graeme Gill wrote:
>
>> None of this is to say that a profile won't help, just that it
>> cannot be perfect, and in general photographs are always going
>> to require some level of subjective adjustment, unless they are
>> all shot under identical conditions.
>
> That was the idea -- one profile per lighting setup. For example,
> there're a half-dozen wooden discs about 26" in diameter. Once I get
> what I want for one, I'll just swap out the art works and keep
> everything else identical.
>
> Some of the larger, more abstract works will need individualized
> lighting...but I'm willing to do one profile per shot if it's worth
> it. It's not /that/ much of a hassle, compared to everything else
> involved.
>
>> Note that a scanner is a much more controlled situation in that
>> the illuminant is fixed, and the characteristics of the test chart
>> can be adjusted to be similar to the type of media that will be
>> scanned.
>>
>>> I have both  a ColorChecker and the scanner chart  that comes with
>>> the i1 Pro. Will either (or both) of those suffice?
>>
>> Sure, but you may have to take particular care about the illumination
>> evenness, and may also have to manually get rid of any perspective
>> distortion (at least until the next release of scanin, which should
>> then take care of this aspect automatically).
>
> I can take extra care in making the test chart perpendicular...and
> there's always Photoshop if I'm off too far.
>
> Will scanin give a recognizable warning, or should it just be the
> first thing I assume is worng if it complains?
>
>> Don't be surprised
>> if they give different results though, since I think that the
>> ColorChecker (DC or SG ?)
>
> It's the regular 24-patch kind
>
>> are composed of individual colorants,
>> while (I presume) the i1 pro scanner chart is some sort of print
>> process.
>
> That was my first guess, but I can't see any hints of a halftone
> screen or dithering, even with an 8x loupe. It's printed on glossy
> photographic paper. (I'll have to be extra careful to avoid glare, I
> guess.) Dye sub, perhaps?
>
> I'll try an experiment in a bit....
>
> Cheers,
>
> b&

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