Best resize with ffdshow for DLP projector 720p ?

[ptiJean]

Heya all,

I've been testing all resize algorithms in ffdshow and I'm out of luck.

I'm using ZP + ffdshow (without avisynth which seems to be very destructive) to watch my DVDs on my projector.

ffdshow : YV12
gradual denoise 30
resize : tested all, using Lanczos 2 with luma sharpen 1.0

Sinc seems to be the best resize method but too slow on my AMD 2400+.
But even with Sinc (and more with Lanczos), I can see residual small artifacts and resizing problems.

Exemple : windows in a church
Source : | | | | | |
lanczos2: | || | | ||
which causes some paralellism (or aliasing) problems.

What "is" the best resizing solution ?

I tried to blur those artifacts with some luma gaussian blur (which smoothes a bit the picture) to do like YUV, but all in all, it doesn't look perfect.

868 in YUV does better.
Any help ?
Please, thanks.
ptiJean

[scharfis_brain]

resize withlower sharpening.

[ptiJean]

resize withlower sharpening.

Hi,
Even with luma sharpen 0 it does the same thing : residual small "dirty" artifacts on textures, and some resizing average job.

The image is not smooth and clean like with a good YUV link.

[Mug Funky]

lanczos and sinc are actually very similar, so you can expect to see the same problems... try soft bicubic if you're adding blur anyway. also, lanczos2 might not be precise enough. is there a lanczos3 available?

i assume you're upscaling, not downscaling?

[ptiJean]

Upscaling yes.

Lanczos 1 does better job than Lanczos 2 on the "mires" (black & white, luma and chroma decode, etc.)

And bicubic runs faster cool, but doesn't seem to be precise enough.

I can perhaps try a Denoise 3d in place of the gradual denoise, to eradik residual small (very small) textures artifacts, and to smooth a little bit the images.

Thanks alot

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[ptiJean]

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[Guest]

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