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000301_owner-lightwave-l _Thu Apr 13 12:33:28 1995.msg
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Date: Thu, 13 Apr 95 10:21:30 -0700
From: feli@d2.com (Feliciano di Giorgio)
Message-Id: <9504131721.AA22275@casablanca.d2.com>
Subject: RE:Artifacting
To: lightwave-l@netcom.com
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Jeric@cup.portal.com writes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>Adrian Onson writes:>
>> I have one small question..... What is artifacting?!? I heard so
>>much about it and the fact that the PAR produces considerabls
>>artifacting, but I have no idea what it is... can someone please answer
>>my question?!?!?!
>
>
>This is incorrect. The PAR >>>may<<< produce artifacting on
>specific image types, but generally produces wonderful images.
> To generalize, the more "computerish" the image, the worst the artifacting.>(Yet another reason to try for naturalism in your animations.)
>
>Artifacts are simply errors in the picture, generated by the com-
>ression algorithm.
> <big .sig deleted>
>
>***********************************************************************
>* (OOOOO) Jeric@cup.portal.com | Synergy Graphix & Animation *
>* (OOOOOOO) Welcome to Seattle! | Film and Video Productions *
>* \\\\\\ Have a latte'! |Technical Subjects Our Specialty! *
>* \\\\\\ Or else! | *
>
>
>--
>
Sorry, but as good as the PAR is (and it really is good), there ALWAYS
are compression artifacts present. They are LESS appearent in live
action footage then in straight CG, but they are there. No matter what
subject you are recording, at the very least you will see in a noticeable
increase in grain, in addition to the "checker boarding" (square shaped
noise patterns) along edges, in patterns, and areas of great contrast.
This artifacting is rather objective. I think MPEG movie disks look a hell
of a lot worse then anything I have seen come out of a PAR. The PAR also
looks a lot better than SVHS.You may be able to get away with this depending
on what type of work you are doing and it blends in pretty
well with live action footage, but I would advise againt using a DDR,
that uses compression, as a framestore for source material.
Feli
______________________________________________________________________
"Nothing is written..."
- T.E. Lawrence
_______________________________________________________________________
Feliciano di Giorgio * DIGITAL DOMAIN * (310) 314-2831 * feli@d2.com