Sansgrip Filters: New Filter in the Works...

SansGrip · #1 01-24-2003, 07:50 PM

Here's a sample (from Signs) of a new filter I'm developing. This filter's raison d'etre is to increase compressibility, not reduce noise, so it should be used in conjunction with a denoiser.

Here's the script:

Code:

LoadPlugin("Debug\Edge.dll")
Mpeg2Source("G:\signs\signs.d2v")
Crop(96, 16, 528, 256)
Telecide()
Decimate()
FaeryDust()
smoothed = Edge().Subtitle("Filtered")
Subtitle("Unfiltered")
StackVertical(last, smoothed)
Levels(0, 1.5, 255, 16, 255)
ConvertToRGB()

And here's the image:

You might want to save the image to a file and zoom in with your favourite viewer. You should notice that low-detail areas such as the wall behind Mel Gibson are significantly smoother (which means significantly more compressible) than with FaeryDust alone, while his face and other important parts of the frame remain really quite detailed.

It'll be a while before this one is ready to go out the door, but I thought I'd share some preliminary results with you

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hedix · #2 01-24-2003, 08:26 PM

Hello SansGrip,

Yesterday I made a post about something like this in the spanish forum

I knew a filter for virtualdub called Smart Smoother HQ ( a very special spatial smoother)

The avisynth version:

http://cultact-server.novi.dk/kpo/av...th_hiq_as.html

The filter looks like this:
SmoothHiQ(Diameter, Luma Threshold, Chroma threshold, Amount, Maintain Difference).
The recommended settings
SmoothHiQ(7, 20, 25, 200, 5)

I was very impressed with this cleaning MPEG artifacts and blocks, so I thing it could be a great choice for low quality sources (old divx...).

By the way, it's long slower than your great filters.

Do you think it could be useful ?

Best Regards.

SansGrip · #3 01-24-2003, 08:40 PM

Quote:

Originally Posted by hedix

I was very impressed with this cleaning MPEG artifacts and blocks, so I thing it could be a great choice for low quality sources (old divx...).

It's probably quite similar as far as smoothing goes (I imagine Smoother HiQ also detects edges to prevent excessive softening), but Edge will also sharpen details as well as smooth flat areas. The sharpening was quite light in the image I posted above, but -- to my eye, anyway -- it definitely makes a difference to sharpen slightly if you smooth away details.

Oh, and another difference is that Edge will be written in MMX-optimized assembler, so it should be fairly fast

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kwag · #4 01-24-2003, 08:57 PM

I can feel that we're going to have another "Encoding Party" very soon

SansGrip · #5 01-24-2003, 08:59 PM

"Very soon" might be a little optimistic

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