One of the most important things that a digital camera can do for you is to
simply provide unclipped data. Clipping is the digital term that corresponds to
overexposure/underexposure. If you have an unclipped image, then you can
post-process it with any profile you like. In fact, for photographers who
digitally process scanned film images, most color filters (that fit to the
lens) are obsolete.
Take any "raw" picture from your digital camera, open it in Photoshop and look
at the histogram. If the values are jammed to the left or to the right (or
both) then unfortunately you have clipped data. The highlights and/or shadows
can never be fully presented using any profile.
The photographer has some control over clipping by setting the camera's
exposure parameters.
This concept applies both to digital and (scanned) film media.
I wrote an article about this (albeit for astrophotographical applications)
that was published in Sky & Telescope. You can see a version of it here:
http://starmatt.com/articles/curves.html
Matt
At 18:24 03-04-03 -0400, Andrew Dacey wrote:
>----- Original Message -----
>From: <petertje@xxxxxxxxxxxxx>
>To: <olympus@xxxxxxxxxxxxxxx>
>Sent: Thursday, April 03, 2003 6:08 PM
>Subject: [OM] Re: [OT] So digital can do it all?
>> But what I really meant, is that any medium can be turned into mostly
>anything else > using post-processing. If you use a film camera with
>Velvia, you don't need any
>> effort to get that result afterwards. Cool ! But if you want something
>that's not
>> available as film of-shelf, then both digital pictures as well as scans
>from print will get
>> you there with post-processing. Having that post-processing in-camera
>would be
>> cool, but I don't know if there are or will be cameras available that
>allow you to
>> download specific "look-like-this-please" algorithms. And that would slow
>down
>> saving the images again, which is another thing I think current digicams
>should be
>> improve upon.
--
Matt BenDaniel
matt@xxxxxxxxxxxx
http://starmatt.com
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