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  #1  
08-17-2003, 06:19 AM
Anonymous Anonymous is offline
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My question is:

I'm quite used with Script's Language such as Perl and i have playing around with Kwag Optimized (tuned) Script.... (tryng diff filters and reso.)

And i think Kwag make a hell of A GOOD JOB


But my doubt cames when seeing Bicubic Resize....

I see things like this

Bilinear - smooth
Bicubic - sharpen
Lanczos - Both of the two (middle term)

So why not use Lanczos instead of bicubic, i must confess i haven't made a test but maybe you did and can answer me this.

Thanks.

Sniffer.
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  #2  
08-17-2003, 06:56 AM
jorel jorel is offline
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sniffer

only my opinion after many tests with 320x240
to 480x480 with dvds sources:

Bilinear - "moving ants" and some "mosquitos" around the edges.
Bicubic - my choice, the best using with sharpen, asharp or unfilter.
Lanczos - "strange artefacts" and too much sharp in the edges.

maybe the results can be better with more resolutions....
like 702x480 but my player don't like it, then i never test!


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08-17-2003, 07:52 AM
vmesquita vmesquita is offline
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Snifer,

Avisynth manual says there's little difference when you are shrinking by bilinear or bicubic, unless you use a sharpening factor in bicubic. I generally do my progressive stuff from DVD using bicubic (I use KWAG script) at 720x480. I do my interlaced stuff (musicals, etc) at 352x480 and then I use lanczos since in this res the additional sharpening is needed. I also use lanczos when converting MPEG4 stuff.
Quotes from Avisynth docs:
" if you are shrinking it, you are probably just as well off, or even better off, with BilinearResize"
"LanczosResize is an alternative to BicubicResize with high values of c about 0.6 ... 0.75 which produces quite strong sharpening.
It usually offers better quality (fewer artifacts) and a sharp image."

[]'s
Vmesquita
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  #4  
08-18-2003, 07:44 AM
Holomatrix Holomatrix is offline
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Quote:
Originally Posted by vmesquita
It usually offers better quality (fewer artifacts) and a sharp image."
Are you talking Lanczos or BiCubic?
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  #5  
08-18-2003, 08:17 AM
Dialhot Dialhot is offline
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He was talking about Lanczos. All was in the same quote (see the ").
Or read the avisynth manual where this sentence was extracted
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