iddi wrote:
>On Sun, 25 Sep 2005 02:39:57 -0700, Moose <olymoose@xxxxxxxxxxxxxxx> wrote:
>
><big snip>
>
>
>
>>The question that I don't know the answer to is why there isn't a JPEG12
>>image format. The amount of extra programming effort to carry 12 bits,
>>rather than 8 or 16, should be trivial.
>>
>>Moose
>>
>>
>
>Does it matter that RAW is 12bit linear while JPG is 8bit log? Some
>photography website had an article about this (no, it wasn't L-L.com, but
>someone else, ken something?)
>
>
I believe the JPEG spec only defines how an image is represented in the
file format. I don't believe it says anything about the mapping of
higher brightness resolution images into its 8 bit space. How the data
is created is the business of the creators, not the file format. No
matter what algorithm/curve is used, mapping 12 to 8 bits loses data.
Moose
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|