Re: Black and White Profiles
Re: Black and White Profiles
- Subject: Re: Black and White Profiles
- From: Steve Kale <email@hidden>
- Date: Mon, 04 Dec 2006 21:13:24 +0000
- Thread-topic: Black and White Profiles
Were you using one of the QTR greyscale strips and related reference file?
If so, it's likely because the greyscale values read were not sufficiently
linear - they just need to smoothly descend.
> From: Marco Ugolini <email@hidden>
> Date: Sun, 03 Dec 2006 11:41:40 -0800
> To: Steve Kale <email@hidden>
> Cc: ColorSync Users Mailing List <email@hidden>
> Subject: Re: Black and White Profiles
>
> In a message dated 12/3/06 1:59 AM, Steve Kale wrote:
>
>> I'm sorry but I am off to catch a flight to Moscow so this is rushed. (I
>> also need to catch up on the Colorburst posts.) In essence, you scan a step
>> wedge with MeasureTool or like software. Then feed the data by dragging and
>> dropping the MT output file onto the QTR Create ICC applet and it generates
>> an ICC profile. Full colour information is stored in the tags used for soft
>> proofing but only luminance data is stored in the tags managing the outbound
>> leg to the printer. Hence you get luminance scaling for whitepoint and
>> blackpoint on the outbound and full colour soft proofing.
>
>
> Thank you very much for taking the time to explain this, Steve.
>
> If, as you suggest, I drag and drop a measurement file (spectral or
> otherwise) created with MT onto the QTR-Create-ICC script, all I get is a
> text file (suffix ".txt") whose name is the same as the original plus "-out"
> at the end, before the suffix. That doesn't look like an ICC profile to me.
>
> What else needs to be done to create a *proper* ICC profile? There's clearly
> something else that I'm missing to make the procedure clear to me.
>
> Thank you, and have a good trip.
>
> Marco
>
>
>
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