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Amiga Plus 1995 #5 & #6
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000287_owner-lightwave-l _Thu Apr 13 00:27:32 1995.msg
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Date: Wed, 12 Apr 95 23:27:41 EST
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In-Reply-To: <Pine.A32.3.91.950412155907.128963A-100000@hopper.acs.ryerson.ca>
(from Adrian Onsen <aonsen@acs.ryerson.ca>)
(at Wed, 12 Apr 1995 16:00:30 -0400 (EDT))
X-Mailer: //\\miga Electronic Mail (AmiElm 4.159)
From: mark@fusion.MV.COM (Mark Thompson)
To: lightwave-l@netcom.com
Subject: Re: artifacting
Sender: owner-lightwave-l@netcom.com
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Adrian Onsen <aonsen@acs.ryerson.ca> writes:
> I have one small question..... What is artifacting?!?
Artifacting is any visible error in an image. It can originate from any
number of sources. Digital under-sampling, image scaling and rotation,
warping, lossy compression, and even antialiasing are all possible sources
of artifacting.
> I heard so much about it and the fact that the PAR produces considerable
> artifacting
Its all relative and some artifacts are more objectionable than others. The
PAR produces more objectional artifacts than digital betacam, but less than
most non-linear editing systems. JPEG type compression (which the PAR uses)
creates little square block-like errors. These types of errors are easily
spotted compared to something like noise. An image could have far greater
errors due to noise and still appear better than a jpeged image, just
because the jpeg "block" artifacts are so easy to spot.
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
* Mark Thompson (603) 424-1829 *
* Fusion Films Inc. mark@fusion.mv.com *
* Radiant Image Productions *
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~