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Re: Media Testing for maclife.de
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Re: Media Testing for maclife.de


  • Subject: Re: Media Testing for maclife.de
  • From: "edmund ronald" <email@hidden>
  • Date: Thu, 11 Sep 2008 12:56:07 +0200

I'm not very good on terminology, I'm using the words mostly
intechangeably. Certainly, any operation done on Tiffs and not Raw
should only be called profiling.

Calibration usually refers to a process closer to establishing
characteristics of hardware. In that sense, I'd call measuring a
sensor's reponse a calibration. There are devices out there which will
do this for you.

Of note however, with a modern LCD with LUTs one changes the behavior
of the display by writing in the LUT. That is a certainly a
calibration operation as it has changed the hardware's behavior.

Cameras are a different story. Assuming you're the manufacturer, yes
you will calibrate the unit in that sense too before shipping it :)

Edmund


On Thu, Sep 11, 2008 at 12:18 PM, Bob Frost <email@hidden> wrote:
> Edmund,
>
>> If the CFA is badly matched to human
>> vision or has spikes then a calibration may work on a target  but that
>> camera will make its users unhappy. Has happened.
>> If the CFA matched (is that possible ?) then calibration with almost
>> any patches would be trivial.
>
> I may be showing my ignorance here, so am I wrong, or are the words
> 'calibration' and 'profiling' wrongly being used interchangeably in much of
> this discussion?
>
> I always understood, but am subject to correction, that they are two
> entirely separate processes. When I run iMatch, or BasicColor, or
> ColorNavigator on my monitors, it is my understanding that they first
> 'calibrate' the graphics card or monitor hardware, and then 'profile' the
> resulting color, although I can opt to do just the latter, with no
> 'calibration'.
>
> What I don't fully understand is the 'calibration' of a camera.
>
> Uli's work seems to be just concerned with 'profiling', not 'calibration'?
>
> Bob Frost.
>
>
>
> ----- Original Message ----- From: "edmund ronald" <email@hidden>
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  • Follow-Ups:
    • Re: Media Testing for maclife.de
      • From: Lars Borg <email@hidden>
    • A definition of calibration and profiling
      • From: Marco Ugolini <email@hidden>
    • Re: Media Testing for maclife.de
      • From: Eric Chan <email@hidden>
References: 
 >Re: Media Testing for maclife.de (From: Eric Chan <email@hidden>)
 >Re: Media Testing for maclife.de (From: "edmund ronald" <email@hidden>)
 >Re: Media Testing for maclife.de (From: "Bob Frost" <email@hidden>)

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