Re: Media Testing for maclife.de
Re: Media Testing for maclife.de
- Subject: Re: Media Testing for maclife.de
- From: Chris Cox <email@hidden>
- Date: Wed, 10 Sep 2008 17:18:27 -0700
- Thread-topic: Media Testing for maclife.de
Wait, who said that Adobe used lightbooths with fluorescent lamps?
Isn't that making a rather large assumption?
(especially since the higher quality X-Rite/Gretag-MacBeth booths use
filtered halogen lamps for daylight)
Chris
On 9/10/08 8:26 AM, "email@hidden"
<email@hidden> wrote:
>
> Message: 8
> Date: Wed, 10 Sep 2008 16:10:49 +0200
> From: "edmund ronald" <email@hidden>
> Subject: Re: Media Testing for maclife.de
> To: "Bob Frost" <email@hidden>
> Cc: email@hidden
> Message-ID:
> <email@hidden>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On Wed, Sep 10, 2008 at 11:57 AM, Bob Frost <email@hidden> wrote:
>> Edmund,
>>
>> For those of us who are not color scientists, but photographers, when you've
>> stopped ROTFLing would you explain the joke in a little more detail please.
>>
>> Thanks,
>>
> Here is a pointer to the spectrum of a fluorescent lamp
> http://www.pl.euhou.net/docupload/files/Excersises/WorldAroundUs/Spectroscope/
> Spectra/Fluorescent_lighting_spectrum_labelled.gif
> Taken from
> http://www.euhou.net/index.php?option=com_content&task=view&id=179&Itemid=13
>
> As you can see, the spectrum of a fluorescent lamp is very spiky. The
> color temperature may be 5000K or similar, but the way it is achieved
> is really ugly. A camera caracterisation made with such an illuminant
> is as much a caracterisation of the light as of the camera. Of course,
> the resulting "profile" will work very nicely in fluorescent-lit
> offices, which is where programmers tend to sit. I think that before
> accusing Ulli of being "unscientific", Adobe should take a hard look
> at their own past methods and practices when establishing their
> profiles. Adobe may have had a good model -the DNG 2-matrix approach-,
> but they combined it with bad experimental practice to match it with
> reality.
>
> Edmund
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