🚀 go-pugleaf

In <1992Sep10.230306.3798@umr.edu> quandt@mcs213c.cs.umr.edu (Brian Quandt) writes:


>I have a question about MPEG, artifacts, and computer generated images.

>I have seen problems when JPEG is used on a simple scene such as one
>rendered by a computer, apparently, the 'high energy' associated with
>lines and such don't work well when dealing with DCT's etc.

>What about MPEG?  Since MPEG is similar to JPEG in that it uses a DCT
>to obtain a portion of its' compression, do artifacts still present
>a problem? I was thinking that since MPEG deals with mulitiple frames
>that the artifact problem may be less then JPEG, or in the least
>an algorithm could be constructed that would cause the artifacts in
>successive frames to 'cancel each other out'.

>I remember seeing the same discussion about JPEG a while ago.  I'd like
>to see a summary if anyone has kept one.  Also what methods were propsed
>to deal with the problem (smoothing etc).  Who has seen and worked on this
>problem?  Anyone, investigating this problem with MPEG?

>					Brian Quandt


>oh yeah, a non-related question, does anyone know how to forward a
>news article to another person (i.e., in elm the command is 'b' for bounce).
>Pipeing to mail doesn't do it, I'd like to keep the 'subject' line intact.


Hi,
get the birdisba.mpg file in:
ftp 130.231.240.17  in pub/mpeg  and have a look at it.
Use the win3.x MPEGXING.LZH player for display.

I figured out, that the quality of the encoding depends on the
luminace and contrast of the supplied pictures.  If you give the
pictures more brightness and less contrast, they seem to have less
artfacts.

Best regards Stefan Hartmann.
email to: leo@zelator.in-berlin.de


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*  Stefan Hartmann       This is how to contact me:         *
*  EMAIL: leo@zelator.in-berlin.de                          *
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