Re: Black and White Profiles
Re: Black and White Profiles
- Subject: Re: Black and White Profiles
- From: "edmund ronald" <email@hidden>
- Date: Wed, 6 Dec 2006 17:41:13 +0100
Maybe someone should bounce this question to Adobe - I thought there
would be a tool for integrating sensitometric readings into PS, and
that transfer curves were that - or else how did printers do it in the
olden days ?
Edmund
On 12/6/06, Jim Rich <email@hidden> wrote:
Hmmm.
That might be assuming a lot... by GUESSING... that the Transfer Curves will
allow you to EASILY do printer linearization.
There might be a method to do this and this would be one good place to find
it. And if it was easy, my guess is that it would have been done by now.
Maybe it has? And if there is then great, but I have never heard or have
seen a methodology to do this and I have been looking for it since 1990. But
then I am only one person.
Now you can use the Photoshop Transfer Curves to do some type of adjustments
to try and optimize the output, but using the Transfer Curves is more of a
trial and error approach that does not use a solid scientific based
linearization method and it would not be easily repeatable.
Jim Rich
On 12/3/06 6:03 AM, "edmund ronald" <email@hidden> wrote:
> This is exactly the sort of information I was looking for.
>
> There is also the Transfer Curves hidden in the output options of
> Photoshop's Print with Preview dialog - my guess is one should be able
> to do printer linearisation with this, thereby improving output
> quality - does anybody know how to ?
>
>
> Edmund
>
> On 12/3/06, Steve Kale <email@hidden> 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. So you can
>> profile any B&W print flow. For example, let's say you want to print a warm
>> toned print with Epson Adv B&W. You print a target with the tint settings
>> you like (I leave all the luminance oriented settings at their default),
>> measure the target and create a profile for those settings. You can then
>> soft proof your image for those tint settings. You'll also get proper
>> management of the luminance differences between the file colour space and
>> the output of the Adv B&W driver with those settings. An added benefit is
>> that if you want to display your image on the web with those exact same hues
>> then you can simply convert the file to that ICC profile and voila the image
>> on screen looks the same as the image in print (black and white points
>> adjusted).
>>
>> http://www.quadtonerip.com/html/QTRoverview.html
>>
>> The RIP itself is fantastic for B&W work - complete and individual control
>> over most Epson printers. And all for a mere $50.
>>
>>
>>> From: Marco Ugolini <email@hidden>
>>> Date: Sat, 02 Dec 2006 18:50:21 -0800
>>> To: Steve Kale <email@hidden>
>>> Cc: ColorSync Users Mailing List <email@hidden>
>>> Subject: Re: Black and White Profiles
>>>
>>> In a message dated 12/2/06 12:29 PM, Steve Kale wrote:
>>>
>>>> I find that QTR Create ICC greatly improves the Adv B&W output from my
>>>> 4800.
>>>> It¹s luminance management packaged into an ICC profile envelope.
>>>
>>> Please explain more in detail: how do you go about doing this?
>>>
>>> Thank you.
>>>
>>> --------------
>>> Marco Ugolini
>>> Mill Valley, CA
>>>
>>>
>>
>>
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